CHI Airline Comparison
Every Airline Improved the Airplane.The Argument Is About the Ticket.
Delta, Emirates, Singapore Airlines and United — four separately researched CHI assessments, set beside one another for the first time.
Read this part first. This page does not rank these four airlines by quality, safety, comfort, network or price. It does not argue that charging for a seat, a bag or a lounge is hostile, that fare tiering is illegitimate, or that the airline with the highest hostility score is the worst airline to fly. None of those propositions appears anywhere below. No airline is re-scored here, and no new score is assigned.
What it examines is narrower. All four carriers spent the same decade making the aircraft better. Over the same decade, all four moved parts of what a ticket used to include behind some condition — a fare tier, a credential, a credit card, a spend threshold, a clock. The question this page asks is: which condition did each airline choose, how much of the product went behind it, and does what still arrives outweigh what was taken?
Each airline above holds its own independently researched CHI assessment, and this page treats those assessments as frozen evidence. Three of the four carry a published CHI. Delta's does not: its assessment withholds a number until its own reserved comparison module is populated, and this page publishes that reservation rather than filling it in. Where an airline lacks evidence for a comparison dimension, the cell says so instead of guessing.
Four airlines, four different answers to one question. What do you have to be, or hold, or buy, before the ticket you already bought works properly?
Published scores
Four airlines, three numbers each — except one.
CHI measures what the commercial relationship takes and restricts. CVI measures what the product actually delivers. CFS is simply CVI − CHI. The two indices are never netted during scoring; they reconcile only through CFS. Every figure below is lifted from the airline's own frozen assessment, and the publication status of each differs.
Delta Air Lines
Attribute-atomized
CFS Not calculableMixed: score reserved
The assessment supports a moderate-to-strong CHI classification but withholds a number until its reserved comparison module is populated.A1
Publication score reserved
Emirates
Label-gated
CFS +37Concerning · Exceptional · Customer-Friendly
The highest CVI in the set. Independently blind-audited and confirmed without revision — and still not publication-locked.A2
Working scores · not publication-locked
Singapore Airlines
Clock- and contract-gated
CFS +37Concerning · Strong-to-Exceptional · Strongly Customer-Favorable
The lowest CHI in the set and the only frozen score — attached to the sharpest recorded deterioration in 2026.A3
Scores frozen 23 August 2026
United Airlines
Affiliation-gated
CFS +11Concerning · Strong · Finely Balanced
The highest published CHI and the narrowest margin: a strong value delivery almost entirely consumed by what sits on top of it.A4
Scores provisional · 26 August 2026
Three cautions before anyone reads these as a league table. First, the four figures do not share a publication status: Singapore's are frozen, United's are provisional, Emirates' are working and unlocked, and Delta's are reserved — they are not interchangeable. Second, the labels attached to the two identical +37 scores differ between their pages: Emirates' assessment calls +37 Customer-Friendly while Singapore's calls the same figure Strongly Customer-Favorable; the methodology band for CFS ≥ 35 is strongly customer-favorable, and each page's own wording is reproduced here rather than harmonised.A5 Third, and most important: a lower CHI is not a recommendation and a higher CHI is not a warning about the flight. The section below explains why the CHI column alone tells you almost nothing about how the exchange actually resolves.
Executive comparison
The hostility did not stay in one place. It moved to whatever each airline found cheapest to gate.
Read the four assessments end to end and the same sentence appears in all of them: the aircraft got better and the ticket got narrower. That is not the finding. The finding is that the four airlines narrowed the ticket along four different axes, and the axis each chose is legible from its market rather than from its temperament.
The ticket became a lattice.
A single cabin stopped being one purchase. Seat location, advance assignment, baggage, boarding position, mileage earning, refundability, same-day movement, upgrade eligibility, lounge access and premium check-in are now independently priced or credential-dependent — and the Basic/Classic/Extra split now runs into every cabin, Delta One included.A1
The financial overlay is explicit: Main Basic earns zero SkyMiles and zero MQDs, while eligible cards can generate up to $10,000 of annual status-qualification without flying at all.A1
The cabin name stopped describing the bundle.
Business Special can exclude advance seat selection, lounge access and chauffeur service, and can carry weaker mileage and upgrade treatment — while the customer has still purchased Business Class.A2A80 Economy divides into Special, Saver, Flex and Flex Plus, with advance seat selection charged across four categories reaching USD 260 per passenger per sector.A2A79
Its own assessment records the fare conditions as disclosed during booking. This is scored as an expectation and complexity problem, not as proven concealment.A2
The product is generous. The promise is not.
Singapore Airlines keeps more inside the fare than any comparator floor product — and attaches the set's only hard mileage clock: 36 months from the month of earning, reset by nothing, with one paid extension and an exemption priced at S$25,000 a year of premium-cabin spend.A3A59A60A61
Underneath sits the sharper fact. Singapore has no passenger-rights statute; the Conditions of Carriage leave the remedy for an airline-caused cancellation to the carrier's election, define denied-boarding compensation only by reference to laws that do not exist at Changi, and are silent on downgrades.A3A51A69A70
The unit of customer changed.
United redefined the customer from a passenger holding a ticket to a member holding a wallet relationship. Earning rate, award price, award availability, baggage, boarding and Wi-Fi all read affiliation status before deciding how to treat the passenger.A4
The measured exhibit: on 19 August 2026, saver business award flights to Europe visible to a cardholder numbered 848; to a non-cardholder, five. Same airline, same programme, same seats.A4A10
All four airlines improved the aircraft. What separates them is the condition each one attached to it — and whether the customer is told.
Why the CHI column does not decide the outcome
Sixteen points of hostility, twenty-six points of outcome.
United and Singapore are 16 CHI points apart. The customer outcome is 26 points apart.
United 63 against Singapore 47 is a real gap in extraction. But CFS +11 against +37 is a much larger gap in outcome, because Singapore's extraction sits on a CVI of 84 and United's on a CVI of 74. Roughly two-fifths of the difference in how the exchange resolves is a difference in what the airline delivers, not in what it takes.A3A4
Emirates and Singapore are one CHI point apart and identical on CFS — from opposite directions.
Emirates 48 / 85 / +37 and Singapore 47 / 84 / +37 look like the same airline twice. They are not. Emirates extracts slightly more through segmentation and is broadly holding position; Singapore extracts slightly less and is deteriorating faster, with four unannounced restrictions inside sixteen weeks of 2026. The identical CFS is arithmetic, not equivalence.A3
The airline with the worst reputation is not the airline with the highest hostility — and the highest is not established.
United holds the highest published CHI in the set. Its own scorecard records that on this assessment's independent evidence United sits below Delta on hostility, and that the pair cannot be reconciled numerically because the live Delta card publishes its CHI as reserved.A4A1 The most hostile airline in this set is therefore not determined, and this page does not name one.
This is the load-bearing point of the whole comparison. CHI is a measure of extraction, not a verdict on the exchange, and not a verdict on the flight. Every airline here is CFS-positive — the airline cohort contains no negative CFS at all, unlike the dating cohort, where three of five companies extract more than they deliver.A5 The useful question is never which number is lowest. It is what is being taken, from whom, and what still arrives regardless.
The brief
Eight findings, in the order they matter.
This is the self-contained comparison. Every claim below is evidenced in the FULL view, where each finding opens its own exhibit and its own numbered sources.
- 01 · The shared move
One mechanism, four local optima.
All four carriers took the same step over the same decade — moving elements of what a ticket used to include behind a condition. Each chose the condition its market made cheapest: the attribute at Delta, the fare label at Emirates, the calendar and the contract at Singapore Airlines, the credit card at United. Reading them together, this is not four different problems. It is one mechanism finding four different local optima.
- 02 · The discriminating test
The floor fare separates these airlines more cleanly than any score does.
Singapore's Economy Lite still carries a hot meal, free alcohol, seatback entertainment, member Wi-Fi, a carry-on and a 25kg checked allowance outside US routes. Emirates' cheapest fares pay for every seat. Delta's Main Basic earns zero SkyMiles and zero MQDs. United's Basic Economy bans the full-size carry-on domestically — the last US major to do so — and earns zero miles without a United card. No comparator floor fare matches Singapore's.
- 03 · The pattern that recurs everywhere
Access Downgrading is the only pattern strongly supported at all four.
It is Delta's primary pattern and Emirates' primary pattern, a strongly supported pattern at Singapore Airlines, and a confirmed pattern at United. Nothing else in the CHI Lexicon appears at that strength across the whole set. Loyalty Penalty is strongly supported at three of four and expressly not matched at United, whose discrimination axis is card ownership rather than tenure.
- 04 · The loyalty trade nobody offers
A permanent balance or a published price. Never both.
Delta and United never expire miles — and abolished their award charts in 2015 and 2019. Singapore Airlines still publishes full award charts and levies no carrier surcharge on any redemption — and runs the set's harshest expiry clock. Of the three programmes where both facts are established, not one gives the customer a balance that keeps and a price that can be checked. Emirates' chart position is not established in the frozen materials and is not asserted here.
- 05 · Basic Economy reached the front of the aircraft
Three of four have installed floor-fare logic in a premium cabin.
Delta extended Basic/Classic/Extra into every cabin including Delta One. Emirates' Business Special strips lounge access, chauffeur service and advance seat selection from a purchased Business Class ticket. United split Polaris and Premium Plus into Base, Standard and Flexible in April 2026, with Polaris Base buying the lie-flat seat and losing the second bag, the lounge, the advance seat assignment, changeability and refundability. Singapore Airlines is the exception in kind — its premium problem is five different business seats under one label — and it took the first step in the same direction in May–June 2026.
- 06 · Operational competence is orthogonal to hostility
The best operator in the set is not the least hostile, and the least hostile is not the best operator.
Delta was Cirium's most-on-time North American airline five consecutive years through 2025 — and owns the set's worst single tail event. United posts the worst mishandled-baggage position of 2025 and the worst Big-4 complaint rate in the last full per-airline series — and shipped the only algorithm in the set that holds departing aircraft for late connecting passengers. Singapore Airlines lost one departing flight at Changi to the CrowdStrike outage. These facts do not line up with the CHI column, and CHI does not ask them to.
- 07 · The strongest shared negative finding
Individualized or AI-driven pricing is not established at any of the four.
Every one of the four assessments tested it. Every one of the four scored it at zero and said so in public. Sophisticated revenue management, continuous pricing and dynamic award pricing are documented across the set; customer-specific behavioural fare-setting is not documented at any carrier here. The precondition is assembled at United — identity-gated sessions, a loyalty identity graph, continuous-pricing pipes — and CHI does not score infrastructure as conduct.
- 08 · The judgment
Better conduct and weaker rights sit on the same side of this table.
The two non-US carriers deliver more and promise less. The two US carriers are bound by compelled refund, disclosure and family-seating regimes their own conduct did not produce — and one of those obligations was cut back by a court in February 2026. The airline closest to a balanced exchange in the methodology's own sense is United, at CFS +11, and that is not a compliment: it describes one of the strongest customer-value systems on this index sitting almost exactly on top of one of its most sophisticated extraction architectures. The customers who come out furthest ahead fly Emirates and Singapore Airlines, at +37 each, for opposite reasons.
The brief ends here. Open the full comparison architecture →
Primary comparison matrix
Twenty-six dimensions, four airlines, qualitative values only.
No dimension below is scored numerically and no airline is re-scored on this page. Values are deliberately coarse, because the underlying evidence does not support finer resolution. Columns run in the order the airlines were assessed, not in any ranking order.
| Dimension | Delta Air LinesAttribute-atomized | EmiratesLabel-gated | Singapore AirlinesClock- and contract-gated | United AirlinesAffiliation-gated |
|---|---|---|---|---|
| Published CHI | DeltaReservedNo number is published. The assessment supports a moderate-to-strong classification and withholds the figure until its reserved comparison module exists.A1 | Emirates48 / 100Concerning. Revenue Extraction 14/25 is the largest component; Behavioral Manipulation 5/25 the smallest.A2 | Singapore47 / 100Concerning, and the lowest in the set. Revenue Extraction 14/25 — the same figure as Emirates, different composition.A3 | United63 / 100Concerning, and the highest published figure here. Revenue Extraction 18/25 and Behavioral Manipulation 13/25.A4 |
| Published CVI | DeltaNot scoredNo CVI is published on the Delta assessment.A1 | Emirates85 / 100Exceptional — the highest in the set. Core Product Value 27/30, Features 22/25, Technology 17/20.A2 | Singapore84 / 100Strong-to-Exceptional. Core Product Value 27/30 and Trust, Safety & Reliability 13/15 — the highest trust sub-score here.A3 | United74 / 100Strong. Core Product Value 23/30 and Trust, Safety & Reliability 9/15 — the lowest trust sub-score here.A4 |
| CFS (CVI − CHI) | DeltaNot calculableRequires both indices; only one side is assessed.A1 | Emirates+37Labelled Customer-Friendly on its own page.A2 | Singapore+37Labelled Strongly Customer-Favorable on its own page. Same arithmetic, different label, different route.A3 | United+11Finely Balanced — inside the methodology band where value and hostility are close enough that small changes could alter the relationship.A4A5 |
| Publication status | DeltaReservedPublication score withheld pending its own comparison module.A1 | EmiratesWorkingIndependently blind-audited and confirmed without revision; explicitly not publication-locked.A2 | SingaporeFrozenFrozen 23 August 2026 — the only frozen figures in the set.A3 | UnitedProvisionalProvisional as at 26 August 2026, pending the cross-company freeze pass.A4 |
| Gating axis — what the airline reads first | DeltaThe attributeFare-Attribute Atomization (provisional): seat, bag, boarding, earning, refundability, same-day movement, upgrade eligibility, lounge and check-in priced or credentialed separately.A1 | EmiratesThe fare labelDeceptive Simplicity (provisional): the cabin name no longer fully describes the bundle a given ticket includes.A2 | SingaporeThe clock and the contractDeceptive Simplicity (provisional): an honest point-of-sale grid over a ratcheting fee schedule and a carrier-elective contract.A3 | UnitedThe credit cardAffiliation sorting: earning, award price, award inventory, baggage, boarding and Wi-Fi all read affiliation status.A4 |
| Primary CHI pattern | DeltaAccess DowngradingBasic restrictions, Sky Club card-visit caps, fare-based lounge exclusion, and Delta One ground benefits separated from the onboard product.A1 | EmiratesAccess DowngradingBusiness Special exclusions; paid lounge access; 2025 First Class Classic Rewards gated to Silver, Gold and Platinum.A2A83 | SingaporeLoyalty PenaltyThe 36-month hard expiry is the type exhibit for this pattern in the whole set.A3A59 | UnitedLoyalty FinancializationMarked provisional, and nominated by its own assessment as the recommended type specimen for the concept.A4 |
| Floor fare — what it still includes | DeltaZero loyalty earningMain Basic earns no SkyMiles and no MQDs, for everyone.A1A87 | EmiratesNo free seat selectionAdvance Economy seat selection is charged on the cheapest fares across four categories, to USD 260 per passenger per sector at the top band. Several standard categories become free once online check-in opens.A2A79 | SingaporeA full-service productEconomy Lite carries a hot meal, free alcohol, seatback entertainment, member Wi-Fi, a carry-on and a 25kg checked allowance outside US routes.A3A43A44A45 | UnitedNo full-size carry-onThe last US major banning it domestically; gate enforcement runs to roughly $75. Zero miles without a United card since 2 April 2026. Cardholders and elites are carved out.A4A6A11A90 |
| Economy hard product | DeltaNot comparably measuredThe assessment records seatback entertainment retained and expanded while some US competitors moved to bring-your-own-device; it publishes no pitch or width figure.A1 | Emirates3-4-3 at 17″ on the 777The narrowest economy width of the four on the recorded measurement.A86 | Singapore3-3-3 at 18–19″ on the 777-300ER32″ pitch across widebody economy and seatback entertainment on every aircraft — the best ordinary economy hard product in the set.A3A41A42 | United30″ standard pitchStandardised down from a mixed 30–31 under United Next, alongside ten-inch seatback screens returning to every economy seat and 1:1 bins.A4 |
| Checked baggage | Delta$45 / $55 domesticFirst bag $15 in 2008 to $45 in 2026, in an industry-wide April 2026 round.A1A88 | EmiratesRoute-variableAllowances vary by route and fare; the assessment records baggage reductions on lower fares from 2015–19 and meaningful baggage inclusion as part of its Core Product Value credit.A2 | SingaporeNo core-network bag-fee creep25–30kg allowances including on the cheapest fare outside US routes; status-tiered excess-baggage discounts introduced October 2025.A3A45 | United$45 prepaid / $50 airportUp from $15 in 2008 — a 233% rise against roughly 50% inflation — waived for the cardholder and a companion.A4A29 |
| Change & cancellation rights | DeltaNo change fees on most faresPermanently eliminated for most non-Basic US and Canada-origin tickets, outlasting the pandemic emergency that prompted them.A1 | EmiratesRestored by fare tierSpecial is the most restrictive; Flex and Flex Plus restore change and refund flexibility at a materially higher fare.A2 | SingaporeRepriced hardest in 2026Cancellation fees up 28–100% for tickets issued from 28 April 2026, with the two largest increases — both a clean doubling — on Economy Flexi and on First and Suites.A3A56 | UnitedFree to change, fee unpublished at the floorChange fees eliminated August 2020, the first legacy carrier to move. The Basic Economy cancellation fee is reported at $74.50 one-way domestic and is no longer published.A4A19A34 |
| Premium-cabin unbundling | DeltaPresent, into every cabinBasic/Classic/Extra now extends into every cabin including Delta One: the same lie-flat seat can come without seat choice, bag allowance, lounge access, check-in or flexibility.A1 | EmiratesPresent — Business SpecialA purchased Business Class ticket that can exclude advance seat selection, lounge access and chauffeur service, with weaker mileage and upgrade treatment.A2A80 | SingaporeFirst step takenNo premium fare-tier unbundling of the Delta or United kind. Complimentary Business seat selection was withdrawn from Lite fares and most Saver and Advantage awards in May–June 2026, against a prior published promise.A3A50 | UnitedPresent — Polaris BasePolaris and Premium Plus split into Base, Standard and Flexible in April 2026; Polaris Base buys the lie-flat seat and loses the second bag, the Polaris Lounge, advance seat assignment, changeability and refundability.A4A33A32 |
| Premium-product consistency | DeltaRecorded as an investment strengthFlat beds fleet-wide, Delta One suites with doors, Premium Select and dedicated Delta One Lounges.A1 | EmiratesTwo-generation split, under correctionOlder 2-3-2 angled-flat 777 Business against A380 and refurbished 777 product; a USD 5 billion retrofit is scored as substantial corrective reinvestment, past its 100th aircraft.A2A85 | SingaporeFive products, one labelFive materially different business seats marketed under one cabin name and one price band; the frontline long-haul seat reaches roughly fourteen years of service before replacement slips to 2027.A3A48A49A50 | UnitedFairly consistentPolaris is consistent; the segmentation is in the fare tiers rather than in the hardware.A4 |
| Mileage expiry | DeltaNoneSkyMiles have not expired for inactivity since 2011.A1A62 | Emirates~3 years to birthday-month endUp to about 47 months in practice; not reset by activity, but paused repeatedly, most recently to 30 June 2026. Elite members and certain co-branded cardholders are exempt. The rule flattens to a strict 36 months for earnings from 1 June 2027.A2A62A63 | SingaporeHard 36 months, no resetNothing resets it — not flying, not redeeming. One paid extension only. The exemption is a spend threshold, not a loyalty threshold: S$25,000 a year in premium cabins.A3A59A60A61 | UnitedNoneMiles have not expired since August 2019.A4A24A89 |
| Award price transparency | DeltaChart abolished 2015Award prices float with route, date and demand with no chart to check them against. The assessment declines to assert a single devaluation percentage.A1 | EmiratesNot establishedAward-chart publication is not addressed in the frozen Emirates materials and no position is asserted here. What is recorded is heavy carrier surcharging on its own awards and a May 2026 devaluation of about 15%.A2A81A82 | SingaporeFull charts publishedSaver, Advantage and Star Alliance partner charts retained; the November 2025 devaluation arrived with two months’ notice. A dynamic “Access” tier was introduced alongside the charts, which the assessment scores as disclosure decay rather than abolition.A3A64 | UnitedChart abolished 2019“No minimum or maximum price.” Since roughly August 2025, even searching for award space requires a member login.A4A25 |
| Award access gating | DeltaFinancial, not inventoryStatus-qualification “Headstarts” of up to $10,000 a year are generated by card spend without flying, while a frequent Basic-fare flyer earns nothing.A1 | EmiratesElite-gated at the topFirst Class Classic Rewards restricted to Silver, Gold and Platinum members in 2025. Skywards status itself remains substantially flight-based.A2A83 | SingaporeMembers-only at the top; a search tollLong-haul First and Suites awards are closed to every partner programme, and from July 2026 accounts holding under about 1,000 miles cannot search award availability at all.A3A65 | UnitedCard-gated inventorySaver business award availability visible to cardholders versus non-cardholders: 848 flights to Europe against five, measured 19 August 2026 on the same seats. Plus a standing 10% cardholder and 15% Premier-cardholder award discount.A4A10A11A40 |
| Award surcharges | DeltaNot assessedNot addressed in the frozen Delta materials.A1 | EmiratesHeavy, on own metalRecorded as heavy carrier surcharging on Emirates’ own awards.A2A81 | SingaporeNone since March 2017No carrier surcharge on any award, own metal or partner. The 2025 sustainable-fuel levy is a Singapore government tax, not a carrier charge.A3A66 | UnitedCleanest fee layer in US aviationNo close-in booking fees, free award changes, cancellations and redeposits at every tier, free pooling for five members. The one residual award fee is a $125 no-show charge.A4A24 |
| Lounge access model | DeltaCommercially overrideableSky Club overcrowding is real and documented, not manufactured — but $75,000 in annual eligible card spend unlocks unlimited access, overriding the visit cap. Membership repriced 27.5–76.9% in a single 2023 round.A1 | EmiratesSold, and fare-conditionalPaid lounge access exists; Business Special can exclude it. Its introduction is expressly not counted as inherently hostile — it initially broadened access for some customers.A2A80 | SingaporeNever sold at any priceAccess is by cabin and status only. Guest rules tightened in 2022.A3A58 | UnitedCard-mediatedA 2025 club restructure that the assessment downgrades to context: Delta’s regime is equal or worse, and United’s own $695 card now beats its cash membership.A4 |
| Connectivity | DeltaFree to members since Feb 2023Converted from a paid ancillary to a free SkyMiles-member benefit.A1 | EmiratesFree Starlink rolling outAcross 232 aircraft to mid-2027 — the fastest connectivity trajectory in the set on the recorded evidence.A2A84 | SingaporeFree but slowUnlimited and free in every cabin since July 2023 — a deliberate de-monetization — at 5–8 Mbps, visibly behind Starlink-equipped rivals, and conditioned on KrisFlyer enrolment in economy and premium economy.A3A46A47 | UnitedBest hardware, narrowest free coverageStarlink at 40–250 Mbps and the largest deployment agreement in commercial aviation — installed on roughly 17% of the mainline fleet. Most mainline flights still charge $8–10. Access runs through MileagePlus enrolment.A4A20A31 |
| Operational delivery | DeltaMost on-time in North AmericaCirium’s most-on-time North American airline five consecutive years through 2025 — with the set’s worst single tail event against it.A1 | EmiratesInsufficient evidenceThe frozen Emirates materials record no independent punctuality or reliability ranking comparable to the figures published for the other three. No comparison is made.A2 | SingaporeTop-five Asia-PacificCirium top-five Asia-Pacific punctuality in 2024 and 2025, on a 7.8-year average mainline fleet.A3A73A77 | UnitedMid-pack, worst-tier bags76.9% on-time and 1.36% cancellations in FY2025; the worst mishandled-baggage position of the roughly ten reporting carriers in 2025.A4A39 |
| Disruption & crisis record | DeltaSevere event, clearedThe July 2024 CrowdStrike recovery was an exceptionally prolonged operational failure; DOT’s June 2026 review closed without penalty, finding refund and disability-assistance handling generally adequate. Expressly not counted as deliberate hostility.A1 | EmiratesCredited, not systematisedCOVID-era flexibility, mass refunds, and flood accommodation and meal support are credited as real customer-risk absorption inside Trust, Safety & Reliability 11/15.A2 | SingaporePaid before it had toFull cash refunds from April 2020 with bonuses for voluntarily taking credits; one departing cancellation at Changi through CrowdStrike; a CEO apology within 24 hours after SQ321, S$1,000 cash in Bangkok, refunds to all 211 passengers, and advance offers above the immediate legal floor.A3A71A72A75A76 | UnitedWorst sequence, fullest reversionThe March 2020 refund-threshold manipulation is the worst documented sequence in the United file; the June 2020 reversion was the fullest of the majors and DOT dismissed the consolidated complaints with prejudice. Set against ConnectionSaver and auto-issued disruption vouchers.A4A18A15 |
| Complaint volume, December 2024 | Delta673 US DOT submissionsRecorded in the Singapore assessment’s comparator series for the same month.A74 | Emirates39 US DOT submissionsSame month, same series. The Department publishes no per-passenger rate for foreign carriers, so this normalizes imperfectly.A74 | Singapore7 US DOT submissionsSame month, same series — the lowest of the four by two orders of magnitude against the US pair.A3A74 | United701 US DOT submissionsSame month, same series. Separately, the last full per-airline rate series — 2023 — put United worst of the Big 4 at 7.47 per 100,000. That figure is 2023 and must not be read as current.A74A28 |
| Accessibility & family seating | DeltaRegulated floor; no guarantee heldThe assessment records DOT’s June 2026 review finding disability-assistance handling generally adequate. Delta does not hold the DOT family-seating guarantee.A1A17 | EmiratesNot assessedAccessibility is not assessed on the frozen Emirates page and no comparison is drawn.A2 | SingaporeFree family seating on every fareFree advance seat selection for children aged 2–11 and for infants on every fare, Lite included — a commitment neither US comparator has made.A3A78 | UnitedBetter mechanism, no guaranteeA dynamic seat-map algorithm opens adjacent seats free for under-12s, including on Basic Economy — and United does not hold the DOT family-seating green check, which it declined. Its assessment also records a documented accessibility arc: a $2M wheelchair-assistance fine in 2016, a first-of-its-kind DOT accessibility agreement in 2023 including a flight-search filter that prioritises aircraft whose cargo door fits the customer’s wheelchair, and best-tier wheelchair handling by 2025.A4A17A22A26A27A91 |
| Customer-data monetization | DeltaModerate supportBroad device, app, transaction and loyalty data use for analytics and advertising, and expanded biometric identity infrastructure. Recorded at moderate support.A1 | EmiratesInformation & Privacy 8/15Voluntary biometric travel options are credited inside Technology & Performance; no advertising business inside the paid relationship is scored.A2 | SingaporeInformation & Privacy 6/15Free economy Wi-Fi requires KrisFlyer enrolment — a data-capture condition on a genuine benefit — and the Kris+ commerce ecosystem extends the data relationship beyond flying.A3A46 | UnitedInformation & Privacy 10/15Kinective Media, launched June 2024, inserts a targeted-advertising business into a paid travel relationship across roughly 100M monthly app sessions and about 100,000 seatback screens. Member data is pledged inside the loan collateral package.A4A21A7 |
| Individualized / AI pricing | DeltaNot establishedDeliberately shown at zero support. Dynamic and AI-assisted revenue management is documented; customer-specific behavioural fare-setting is not, as of August 2026.A1 | EmiratesNot establishedSecret individualized base-fare discrimination by browsing history, device, urgency or vulnerability was tested and not established.A2 | SingaporeNot establishedDynamic award pricing and ordinary revenue management are documented; customer-specific behavioural pricing is not evidenced. Scored at zero, as on the Delta assessment.A3 | UnitedNot establishedInfrastructure observed and assembled — identity-gated sessions, a loyalty identity graph, continuous-pricing pipes. CHI does not score infrastructure as conduct. A congressional inquiry into airline surveillance pricing is open, with letters sent to eight carriers including United on 11–12 August 2026; no United response had surfaced as at that assessment’s publication.A4A35 |
| Enforceable customer floor | DeltaUS DOT regimeBound by the DOT automatic-refund rule of April 2024; the 2024 airline fee-disclosure rule was vacated by the Fifth Circuit on 3 February 2026 and the 2011 framework restored.A1A15A30 | EmiratesNot assessedThe frozen Emirates materials do not assess its home regulatory floor, and no comparison is made.A2 | SingaporeAlmost none at the hubNo comprehensive passenger-rights statute; the government declined to create one in February 2019 and again in October 2024. Timings are not part of the contract, the cancellation remedy is the carrier’s election, denied-boarding compensation is defined only by reference to laws that do not exist at Changi, and downgrades are unaddressed. EU, UK, US and Montreal Convention protections still apply where they reach.A3A51A69A70 | UnitedUS DOT regime, litigatedThe same federal floor — and United was a petitioner in the challenge that produced the 3 February 2026 vacatur of the fee-disclosure rule. It did not litigate the automatic-refund rule.A4A30A15 |
| Direction of travel | DeltaFragmenting, with reversalsCommercial architecture more fragmented and conditional after 2012 and more pronounced 2022–2026, alongside a materially softened 2023 status and lounge retrenchment after customer backlash.A1 | EmiratesLargely staticStructural rather than accelerating hostility, with a May 2026 devaluation of about 15%.A2A82 | SingaporeWorsening fastestA fee ratchet running since 2018, a devaluation cadence compressed from about five years to three, and four unannounced restrictions inside sixteen weeks of 2026.A3A52A53A54A56A65 | UnitedMore precise, not more hostileIts own assessment’s formulation: United did not become more hostile, it became more precise — better technology and product for the affiliated, a quietly thinner floor for everyone else.A4 |
Six cells in this matrix say “not assessed” or “insufficient evidence”, and four of them are Emirates. That is a real asymmetry in the evidence base, and it is shown rather than smoothed over: the Emirates assessment is the shortest of the four and does not address award-chart publication, operational reliability, accessibility, or its home regulatory floor. Delta is missing both indices entirely. Where a row could only be completed by inference, it is left incomplete.
↩ Return to the briefPattern comparison
Which patterns recur, and which belong to one airline only.
Only patterns actually recorded in the four frozen assessments appear below. No pattern is assigned to an airline to complete a row, and where an assessment did not test a pattern the cell says so rather than implying absence. Tested-and-not-supported is a finding; not-assessed is not.
| Pattern | Delta | Emirates | Singapore | United |
|---|---|---|---|---|
| Access Downgrading | Primary pattern. Strong support.A1 | Primary pattern. Strong support.A2 | Strong support.A3 | Confirmed.A4 |
| Loyalty Penalty | Strong support.A1 | Strong support.A2 | Primary pattern and the set’s type exhibit.A3 | Tested and not matched. No evidence loyal customers pay more than new ones; the discrimination axis is card ownership, not tenure.A4 |
| Paywall Creep | Strong support.A1 | Strong support.A2 | Moderate. Partly contradicted by the 2023 Wi-Fi reversal from paid to free and by seats becoming free at online check-in.A3A46A55 | Not separately assessed under this label.A4 |
| Price Creep | Supported. First bag $15 (2008) to $45 (2026); Sky Club membership up 27.5–76.9% in a single 2023 repricing.A1 | Not separately assessed under this label.A2 | Strong support. Seat fees roughly doubled at the floor since 2018 across three unannounced rounds; cancellation fees up 28–100% in April 2026.A3A52A53A54A56 | Supported. Bags $15 to $50; Economy Plus subscription $499 to $599+; United Club $650 to $750 with benefits stripped. Levels and cadence industry-standard; the design is United’s.A4 |
| Reference-Price Erasure Provisional | A named core mechanism. The public award chart was removed in February 2015; the assessment declines to assert a devaluation percentage, because removing the detection tool is the finding.A1 | Not addressed in the frozen materials.A2 | Supported as disclosure decay rather than chart abolition — and strongly counterweighted, because the published award charts are the single best anti-erasure fact in the set.A3A64 | Confirmed. Charts abolished November 2019 with “no minimum or maximum price”; an unpublished Basic Economy cancellation fee; a tenfold internal price range on Economy Plus.A4A25A34 |
| Promise Reversal | Recorded in the customer’s favour: the 2023 status and lounge retrenchment was materially softened after backlash — a genuine partial reversal, not a full restoration.A1 | Moderate support.A2 | Narrow. The published promise of complimentary Business seat selection “at any time” was reversed in May 2026. The 2023 meal reversal runs the other way and is credited as a correction.A3A50 | Present, and expressly distinguished from Quiet Rescission — which is defined by silence, not by announcement.A4 |
| Artificial Scarcity | Not counted as fabricated. Sky Club overcrowding is real; the finding is the commercial allocation mechanism. Refined into the provisional concept Commercially Overrideable Scarcity.A1 | Weak support.A2 | Not established. Roughly 72 Suites across twelve A380s is a genuine production constraint, not a manufactured shortage; Spontaneous Escapes releases discounted space monthly.A3A67 | Present only as the provisional Commercially Overrideable Scarcity: unsold preferred seats release free at check-in, which is the proof that the charge is for queue position rather than capacity.A4 |
| Advertising Creep | Data and tracking creep recorded at moderate support, including data use for advertising.A1 | Not assessed.A2 | Not assessed.A3 | Supported. Kinective Media inserts a targeted-advertising business into a paid travel relationship. Scored inside Revenue Extraction, and recorded as industry-parallel rather than unique.A4A21 |
| Rentalization | Not assessed.A1 | Not assessed.A2 | Not assessed.A3 | Confirmed, and airline-specific: United was first in the US, in June 2013, to sell annual subscriptions for checked bags and Economy Plus. The fare ladder now rents back changeability, the carry-on and legroom.A4 |
| Convenience Tax | Secondary. A $50 agent-handling fee, waivable through self-service; paid same-day confirmation for non-elite members.A1 | Not assessed.A2 | Narrow but real: a US$50 offline booking and service fee, a higher offline award redeposit charge, and card surcharges in five markets.A3 | Not assessed under this label.A4 |
| Individualized / AI-driven pricing | Not established. Shown at zero support.A1 | Not established.A2 | Not established. Scored at zero, as on the Delta assessment.A3 | Not established, and not asserted anywhere on that page.A4 |
One pattern is strongly supported at all four: Access Downgrading. Nothing else in the Lexicon reaches that strength across the whole set. It is the primary pattern at Delta and at Emirates, a strongly supported pattern at Singapore Airlines, and confirmed at United — four different mechanisms producing the same customer experience, which is a ticket that no longer reaches the thing it used to reach.
Airline-specific concepts
Five provisional concepts, and one proposed pattern. None is canonical yet.
These are research-level concepts nominated by individual assessments. They are marked Provisional or Proposed on their own pages and are not formal entries in the sitewide Lexicon; whether any should be added is a taxonomy decision reserved for cross-company normalization.A1A3A4
Fare-Attribute Atomization
A single cabin ceases to be one purchase and becomes a bundle of independently priced or credential-dependent attributes. Airline-specific to Delta in this set — the other three fragment by fare tier, label or affiliation rather than by attribute.A1
Loyalty Financialization
Rewards tied to financial-product participation rather than to flying. Delta records American Express remuneration rising from $6.8bn in 2023 to $7.4bn in 2024 to $8.2bn in 2025 — about 20.6% over two years.A1 United’s assessment nominates itself as the recommended type specimen, on the strength of the full loop: programme appraised at roughly $21.9bn against a smaller market capitalisation, $6.8bn raised against it, member data and brand inside the collateral package, and a written reservation to “limit redemptions or devalue”.A4A7A8
Commercially Overrideable Scarcity
Real capacity limits, commercial allocation. Delta: Sky Club crowding is genuine, but $75,000 of annual eligible card spend removes the visit cap entirely.A1 United: unsold preferred seats release free at check-in, which proves the charge is for queue position rather than for a product.A4 A refinement of Artificial Scarcity, not a replacement for it.
Deceptive Simplicity
The headline label stops describing the bundle. At Emirates it is the cabin name over Business Special.A2A80 At Singapore Airlines it is one “world class” label over five business hard products, a fourteen-year-old frontline seat and a carrier-elective contract — with an honest fare grid at the point of sale and the trajectory of the terms narrated nowhere.A3A44A48A51 Neither US carrier is scored under it.
Quiet Rescission Proposed
A company makes a visible, reputationally load-bearing reform during a crisis, receives public credit for it, and later removes or weakens it without equivalent disclosure — while the public record goes on crediting the dead promise. Type specimen: the post-2017 voluntary denied-boarding ceiling of $10,000, cut to $2,500 on 1 May 2020 with no announcement, alongside an involuntary downgrade ceiling cut from $10,000 to $1,500.A4A13A14 Nominated on no other page in this set. It becomes canonical only when it is added to the Lexicon.
Dependency Creation
Bag waivers, boarding, earning, award prices, award inventory and Wi-Fi all routing through a single airline-issued financial product. Its ceiling is set by aviation’s genuinely low exit costs — a customer can simply fly a competitor next week — which is why the concept is carried at provisional weight rather than as a lock-in finding.A4
Tested and refused
What the four assessments looked for and did not find.
- Individualized or AI-driven pricing — not established at any of the four. Every assessment tested it, every assessment scored it at zero, and three say so in an explicit exclusions section. The 2025 AI-pricing controversy involved a different carrier and a different vendor; the widely circulated “bait and switch” condemnation was not United’s chief executive. United’s assessment retires that misattribution by name.A1A2A3A4
- Operational failure as deliberate hostility — refused twice. Delta’s July 2024 CrowdStrike recovery is not counted as hostility: it was a severe operational failure with an exceptionally prolonged recovery, and DOT’s June 2026 review closed without penalty.A1 United’s 2023 Newark meltdown is not counted as manufactured: the trigger was weather and air-traffic control, and what is scored is the internal crew-scheduling collapse and the response.A4
- Manufactured scarcity — refused at three carriers. Delta’s lounge crowding is real; Singapore’s flagship-cabin scarcity is a genuine production constraint; United’s Economy Plus is investment-backed segmentation that earns its price. What is scored in each case is the allocation mechanism, not the shortage.A1A3A4
- Concealment — refused at two. Emirates’ fare conditions are disclosed during booking; the finding is expectation and complexity, not proven concealment.A2 United’s own-channel disclosure was repeatedly found better than average, and Intellectual Disrespect was tested and not supported: the hostility operates through complexity and gating, not by insulting the customer’s intelligence.A4
- Automation replacing humans — refused at United. Algorithmic Replacement was tested and not supported as hostile: the automation mostly resolves, auto-issuing the vouchers customers previously had to queue and argue for. The narrower residue — a thinner staffed fallback and self-service steering — survives and is recorded separately.A4A23
Loyalty-program economics
The clearest four-way divergence in the whole comparison.
Four programmes, four different theories of what a mile is. One treats it as a marketing liability to be managed on a schedule; one treats it as a currency with a published price; one sells it to a bank at scale and lets the bank decide who may spend it; one keeps it flight-earned and gates the redemption instead. These are not degrees of the same thing.
| Programme mechanic | SkyMiles | Skywards | KrisFlyer | MileagePlus |
|---|---|---|---|---|
| Balance permanence | No expiry since 2011.A1A62 | About three years to the end of the member’s birthday month — up to roughly 47 months in practice — not reset by activity but repeatedly paused, most recently to 30 June 2026. Flattens to a strict 36 months for earnings from 1 June 2027.A2A62A63 | Hard 36 months from the month of earning. Nothing resets it. One paid extension only; the exemption is S$25,000 a year of premium-cabin fare spend, which economy, premium economy and award travel cannot reach.A3A59A60A61 | No expiry since August 2019.A4A24A89 |
| Published award price | Chart abolished February 2015.A1 | Not established in the frozen materials.A2 | Full Saver, Advantage and partner charts retained; the November 2025 devaluation arrived with two months’ notice.A3A64 | Chart abolished November 2019 — “no minimum or maximum price.”A4A25 |
| Carrier surcharges on awards | Not addressed.A1 | Heavy, on its own metal.A2A81 | None since March 2017, own metal or partner. The 2025 sustainable-fuel levy is a government tax, not a carrier charge.A3A66 | None. No close-in fees, free changes, cancellations and redeposits at every tier.A4A24 |
| Who can reach the best inventory | Members, with status and card spend shaping qualification rather than inventory.A1 | Skywards Silver, Gold and Platinum only for First Class Classic Rewards since 2025.A2A83 | Members only at the top: long-haul First and Suites awards are closed to every partner programme. From July 2026 an account under about 1,000 miles cannot search availability at all.A3A65 | Cardholders. Saver business award availability visible to cardholders versus non-cardholders on flights to Europe ran 848 against five on 19 August 2026 — inventory a non-cardholder cannot buy at any number of miles.A4A10A40 |
| Banking relationship | American Express remuneration to Delta rose from $6.8bn (2023) to $7.4bn (2024) to $8.2bn (2025), about 20.6% over two years. Eligible cards can generate up to $10,000 of annual status-qualification without flying.A1 | Status remains substantially flight-based rather than directly purchasable through ordinary transferred credit-card points.A2 | No card-gated award inventory and no card-purchasable status tier is recorded; mid-tier status is distance-based.A3 | Co-brand remuneration up 12% in 2025, with more than a million new cards for the third consecutive year. Card spend generates qualifying points, so the elite ladder is climbable by swipe.A4A11A36 |
| Programme financialization | Named as a provisional core mechanism: rewards increasingly track financial-product participation rather than flying.A1 | Not assessed.A2 | Not assessed under this concept.A3 | The complete loop, and the nominated type specimen: appraised at roughly $21.9bn, $6.8bn raised against it, brand, member data and programme IP inside the collateral package, and a written reservation to “limit redemptions or devalue their proprietary currency as-needed.”A4A7A8A9 |
| Independent per-mile valuation | Not published on that assessment.A1 | Not published on that assessment.A2 | The highest of the four on the recorded valuation — about 1.4¢ against 1.1–1.2¢.A3A68 | Not published on that assessment.A4 |
| Devaluation conduct | Serial repricing with no chart to measure it against; the assessment declines to assert a percentage because the data does not support one.A1 | A devaluation of about 15% in May 2026.A2A82 | A cadence compressed from about five years to three — delivered with notice, and with some economy Saver zones cut rather than raised in 2025.A3A64 | At least seven rounds, all without notice after 2019, against a liability that is collateral for the airline’s debt.A4A7A25 |
On the 71% figure, stated precisely, because it is routinely mangled. United’s 2020 financing documents disclose that in 2019, 71% of cash flow from mileage sales came from miles purchased by third-party partners — primarily Chase. The figure describes the composition of that year’s mileage-sales cash flow. It is not a statement about the share of miles issued, nor about the share of miles going to third parties. What it establishes is narrower and still decisive: the bank is the programme’s largest counterparty.A4A8
Delta and United will keep your balance forever and will not tell you what it is worth. Singapore Airlines will tell you exactly what it is worth and take it away on a schedule. Of the three programmes where both facts are established, not one offers both.
That trade is the comparison-only finding in this section, and it is not visible from any single assessment. Emirates is excluded from it because its award-chart position is not established in the frozen materials; the exclusion is stated rather than resolved by inference. The two US programmes carry the cleanest fee layers in the set and the least legible prices; KrisFlyer carries the most legible price in the set and the only confiscation clock. A permanent balance and a published price have not, in this set, been offered together.
↩ Return to the briefOperational delivery and customer treatment
Operational competence and commercial hostility are orthogonal, and this set proves it.
CHI scores how a company treats customers, not how well it runs an airline. The two come apart hard here: the most punctual carrier in the set owns its worst single failure, the carrier with the highest published hostility ships the best disruption automation, and the carrier with the lowest hostility performs best in a crisis while owing the least.
Delta
Baseline: Cirium’s most-on-time North American airline five consecutive years through 2025.A1
Tail event: the July 2024 CrowdStrike recovery was severe and exceptionally prolonged. DOT’s June 2026 review closed without penalty, finding refund and disability-assistance handling generally adequate. Not counted as hostility.A1
Involuntary denied boarding: effectively zero, and already near zero before the industry's 2017 reforms, via its bidding system — the best position of the majors on the recorded series.A4A38
Complaints: 673 US DOT consumer submissions in December 2024.A74
Emirates
Baseline: Insufficient evidence The frozen materials record no independent punctuality or reliability ranking. No comparison is made and none is inferred.A2
Crisis conduct: COVID-era flexibility, mass refunds, and flood accommodation and meal support are credited inside Trust, Safety & Reliability 11/15 — the lowest CVI trust sub-score of the three carriers that have one.A2
Complaints: 39 US DOT consumer submissions in December 2024, on a US operation a few times larger than Singapore’s.A74
Singapore Airlines
Baseline: Cirium top-five Asia-Pacific punctuality in 2024 and 2025, on a 7.8-year average mainline fleet.A3A73A77
Crisis conduct: one departing cancellation at Changi through CrowdStrike; full cash refunds from April 2020 with bonuses paid to customers who voluntarily took credits instead; after SQ321, a CEO apology within about 24 hours, S$1,000 cash in passengers’ hands in Bangkok, refunds to all 211 passengers and advance offers above the immediate legal floor.A3A71A72A75A76
Complaints: 7 US DOT consumer submissions in December 2024.A74
United
Baseline: 76.9% on-time and 1.36% cancellations in FY2025; the worst mishandled-baggage position of the roughly ten reporting carriers in 2025, partly structural given hub and connecting mix.A4A39
Automation: ConnectionSaver has held departing flights for late connecting passengers since 2019 — roughly 3.3 million connections saved by United’s own count, about six years before a comparable major-carrier programme, with zero customer burden. Since June 2023 the app auto-issues meal and hotel vouchers.A4A18A23
Involuntary denied boarding: collapsed from roughly 3,765 passengers in 2016 to a rate of 0.01–0.03 per 10,000 passengers, held for nine straight years — second only to Delta.A4A38
Complaints: 701 US DOT consumer submissions in December 2024; the last full per-airline rate series, from 2023, put United worst of the Big 4. That figure is 2023 and is not a current measurement.A74A28
The best-behaved carriers here owe the least, and that is not a coincidence.
Singapore Airlines’ conduct record is the strongest in the set on the three cleanest natural experiments of the period — and its enforceable floor is the weakest. Singapore has no comprehensive passenger-rights statute; its government declined to create one in February 2019 and again in October 2024. The Conditions of Carriage state that scheduled times do not form part of the contract, leave the remedy for an airline-caused cancellation to the carrier’s election, define denied-boarding compensation only by reference to laws that do not exist at Changi, and are silent on involuntary downgrades.A3A51A69A70
Delta and United perform under compulsion: the DOT automatic-refund rule requires cash, automatically, to the original payment method, with the definitions written into federal law and voucher substitution banned without the customer’s affirmative choice.A1A4A15 The US pair’s better rules and worse conduct are partly a regulatory artefact rather than a preference — and so is the reverse.A3
One of those obligations was cut back by a court in February.
The 2024 airline ancillary-fee disclosure rule was vacated by the Fifth Circuit on 3 February 2026 in Airlines for America v. DOT, on Administrative Procedure Act grounds, restoring the 2011 framework. United was a petitioner alongside A4A and five other majors.A4A30
The distinction the comparison holds open: United did not litigate the automatic-refund rule; its petitions targeted fee disclosure and the wheelchair rule.A4 A carrier improving its conduct while narrowing the rule that would compel the conduct is a Trust & Transparency finding, not a refund finding, and the two are scored separately.
Two carriers assessed in depth, one at the regulatory floor, one not assessed at all.
Singapore Airlines gives free advance seat selection to children aged 2–11 and to infants on every fare including Lite — a family-seating commitment neither US comparator has made.A3A78 United built a dynamic seat-map algorithm that opens adjacent seats free for under-12s, including on Basic Economy, and separately holds a documented accessibility arc: a $2 million wheelchair-assistance consent order in 2016, a first-of-its-kind DOT accessibility agreement in 2023 that included a flight-search filter prioritising aircraft whose cargo door fits the customer’s wheelchair, and best-tier wheelchair handling by 2025.A4A22A26A27
Neither United nor Delta holds the DOT family-seating guarantee. United’s policy covers under-12s where the DOT standard is 13-and-under, and a United spokesperson said the carrier would not modify the policy to meet that threshold.A4A17A91 Emirates’ accessibility position is not assessed in the frozen materials.A2
All four assessments credit fixes in full. Three of the four have one.
The methodology’s FIXED UNDER PRESSURE principle credits a correction in full where customers receive the benefit today, and records the pressure that produced it separately.A3A5 Delta materially softened its 2023 status and lounge retrenchment after customer backlash — a genuine partial reversal, not a full restoration.A1 Singapore Airlines killed a March 2023 economy catering downgrade within three months, with a public apology from its chief executive.A3 United’s post-2017 operational reforms held for nine years and were in places federalized, and its June 2020 refund reversion was the fullest of the majors.A4
The asymmetry worth noting is that United is the only carrier here with a documented correction that was itself quietly reversed — the compensation ceiling, cut by three quarters on 1 May 2020 with no announcement, while consumer coverage went on citing the dead figure for six years.A4A13A14
Evolution
Four chronologies that are not on the same clock.
These columns are not a synchronised timeline and must not be read across. The four assessments cover different periods, at different resolutions, from different baselines: Delta plots 2000–2026, Emirates plots pre-2015 to 2026 in named eras rather than years, Singapore Airlines plots 2015–2026, and United plots 2005–2026. Each column below shows only that airline’s own recorded sequence. CHI finding The comparable thing is the shape — and the shapes differ.
Delta Air Lines
Assessment window 2000–2026- 2008–2010First and second bag fees in effect after the fuel shock; change penalties of roughly $150–200. Not a Delta invention — an industry-wide response.A1
- Feb 2015Public SkyMiles award chart eliminated; Basic Economy expanding; revenue-based earning aligns rewards to spend.A1
- 2020Change fees permanently eliminated for most non-Basic US-origin tickets.A1
- 2022Basic stops earning any SkyMiles or status credit.A1
- 2023Wi-Fi converted from a paid ancillary to a free member benefit; the year’s status and lounge retrenchment is materially softened after backlash.A1
- 2026Basic/Classic/Extra now extends into every cabin including Delta One; Sky Club access requires resolving a fare, status, card and spend decision tree.A1
Emirates
Assessment window pre-2015 to 2026 · named eras- 2015–19Formal fare families introduced; advance Economy seat charges, paid lounge access and baggage reductions on lower fares begin.A2
- 2019Business Special launches, expanding Business Class price accessibility — and making advance seat selection, lounge access and chauffeur service fare-conditional inside Business Class itself.A2
- 2022–23Premium Economy introduced; the USD 5 billion cabin retrofit begins correcting the old 777 product gap.A2
- 2025First Class Classic Rewards restricted to Silver, Gold and Platinum members.A2A83
- Nov 2025Free Starlink announced across 232 aircraft to mid-2027.A84
- 2026Extra Legroom seating reaches up to USD 260 per sector; a Skywards devaluation of about 15% in May.A2A82
Singapore Airlines
Assessment window 2015–2026- 2018First-ever seat-selection fees introduced; Economy Flexi accrual cut from 100% to 75%; award change and cancellation fees raised by up to five times — alongside a real customer gain, deep-discount accrual floors raised from 10% to 50%.A3A52
- 2021–22Economy Lite baggage cut from 30kg to 25kg; seat fees raised up to 88% without announcement; COVID-era unlimited free changes ended.A3A53
- Jul 2023Free unlimited Wi-Fi in every cabin — a deliberate de-monetization. The March 2023 economy catering downgrade is reversed within three months with a CEO apology.A3A46
- 2024Seat-selection fees raised again by up to 75%, again unannounced.A3A54
- Nov 2025KrisFlyer devaluation delivered with two months’ notice; a dynamic “Access” award tier introduced alongside the published charts.A3A64
- Apr–Jul 2026Four restrictions in sixteen weeks, none announced: cancellation fees up 28–100%; no-show fees removed from the booking-page comparison grid in the same change; Business seat selection stripped from Lite fares and most awards; award search gated at a 1,000-mile balance.A3A56A50A65
United Airlines
Assessment window 2005–2026- Jun 2013Annual subscriptions for checked bags and Economy Plus — a US first, and the earliest Rentalization exhibit in the airline file.A4
- 2017–2019Basic Economy launches in 2017, the harshest of the Big 3; preferred seating monetizes row position in 2018; award charts abolished November 2019.A4A6A25
- 2020The contradiction year: change fees permanently eliminated in August, first mover — and, in March, the refund threshold moved three times in a week, and in May the compensation ceiling was cut by three quarters with no announcement.A4A19A13A14
- 2019–2024ConnectionSaver; free same-day standby for everyone; auto-issued disruption vouchers; the family-seating algorithm; radar-map delay texts; the Starlink agreement.A4A18A19A20A22A23
- Aug–Nov 2025Excursionist Perk terminated on 21 August 2025, announced 22 May 2025; instant upgrades ended the same day; published upgrade charts converted to dynamic in November. Polaris saver inventory moved into the card- and status-gated bucket.A4A40
- Feb–Apr 2026Cardholder award discounts of 10–15% disclosed in February; base earning cut roughly 40% for members without a United card on 2 April; checked bags to $45/$50; Polaris split into Base, Standard and Flexible on 3 April.A4A11A12A29A33
What is comparable, and what is not. The four windows do not align, so no year-on-year cross-reading is offered. What the shapes support is narrower: Delta’s and Emirates’ sequences step down and then flatten; United’s runs down and up simultaneously through the same years, which is why its CVI and CHI both land high; and Singapore Airlines’ is the only one of the four whose steepest recorded descent is its most recent one. That last observation is a statement about each assessment’s own record, not a forecast.
↩ Return to the briefWhat the comparison reveals
Six things that are not visible from any single assessment.
Everything below required all four files open at once. None of it is a re-scoring, and none of it changes a published figure.
01 · It is one mechanism, not four problems.
Read alone, each assessment reads as a company-specific story: Delta atomized the ticket, Emirates unbundled the cabin label, Singapore Airlines runs a clock, United sells the airline through a bank. Read together, the four are variations on a single move — take something the ticket used to include, attach a condition to it, and price the restoration.
What differs is only which condition each market made cheapest. In the US, co-brand economics make affiliation the cheapest gate, and both US carriers gate on financial relationship — Delta through card spend and status qualification, United through card ownership itself.A1A4 In a jurisdiction with no passenger-rights statute, the cheapest gate is the contract and the calendar, and Singapore Airlines uses both.A3A51 In a hub carrier selling a glamour product, the cheapest gate is the fare label, because the label is what the customer is buying.A2 The behaviour tracks the market, not the temperament. CHI finding
02 · The floor fare discriminates better than the score does.
The CHI column separates these airlines by sixteen points. The cheapest ticket each one sells separates them far more sharply, and in a way any customer can check before booking.
Singapore’s Economy Lite still carries a hot meal, free alcohol, seatback entertainment, member Wi-Fi, a carry-on and a 25kg checked allowance outside US routes.A3A43A44A45 Emirates’ cheapest fares pay for every advance seat.A2A79 Delta’s Main Basic earns zero SkyMiles and zero MQDs, for everyone.A1A87 United’s Basic Economy bans the full-size carry-on domestically and earns zero miles without a United card.A4A6A11 No comparator floor fare matches Singapore’s — and that single test predicts the CVI ordering better than any pattern list does. CHI finding
03 · Nobody sells a balance that keeps and a price you can check.
Delta and United never expire miles — and abolished their award charts in 2015 and 2019.A1A4A24A25 Singapore Airlines publishes full charts, levies no carrier surcharge, and carries the highest independent per-mile valuation of the four — and runs the only hard confiscation clock in the set.A3A64A66A68A59
Of the three programmes where both facts are established, not one offers permanence and legibility together. Emirates is excluded because its chart position is not established in the frozen materials; that exclusion is stated rather than resolved by inference.A2 This is the clearest example on the page of a finding that is invisible from any one file and unmissable from four. CHI finding
04 · Floor-fare logic has reached the premium cabin at three of four.
Delta extended Basic/Classic/Extra into every cabin including Delta One.A1 Emirates’ Business Special strips lounge access, chauffeur service and advance seat selection from a purchased Business Class ticket.A2A80 United split Polaris and Premium Plus into Base, Standard and Flexible on 3 April 2026, with Polaris Base buying the lie-flat seat and losing the second bag, the lounge, the advance seat assignment, changeability and refundability.A4A33A32
Singapore Airlines is the exception, and it is an exception in kind rather than in degree: its premium problem is five different business seats under one label, not a fare ladder inside the cabin.A3A48 Its May–June 2026 withdrawal of complimentary Business seat selection is the first step in the other direction, and it was taken against a prior published promise.A3A50 CHI finding
05 · Better conduct and weaker rights sit on the same side.
The two carriers with the strongest documented conduct are the two with the weakest enforceable floors, and the two with the strongest enforceable floors have the worse conduct records. Singapore Airlines treats customers better than it is obliged to, in a jurisdiction whose government twice declined to create the obligation.A3A69A70 Delta and United perform under a federal refund rule that writes the definitions into law.A1A4A15
The Singapore assessment states the consequence directly: the US pair’s better rules and worse conduct are partly a regulatory artefact rather than a preference.A3 And the floor moved in 2026 — the fee-disclosure rule was vacated by the Fifth Circuit on 3 February 2026, with United among the petitioners.A4A30 A comparison that ranked these four on conduct alone would rank the least-obligated carriers highest, which is exactly the error CHI exists to avoid. CHI finding
06 · The sector’s worst-documented behaviour is not what anyone expects.
Individualized or AI-driven pricing is the accusation the public attaches to airlines, and it is not established at any of the four. All four assessments tested it and all four scored it at zero.A1A2A3A4 What is documented instead is duller and more consequential: reference prices being removed, disclosure quietly narrowing, and access being conditioned on a financial relationship.
The one place where infrastructure is visibly assembled — identity-gated award sessions, a loyalty identity graph, continuous-pricing pipes — is United, and its assessment declines to score infrastructure as conduct while recording that a congressional inquiry is open and unanswered.A4A35 The comparison’s strongest shared negative finding is that the loudest allegation in the sector is, on this evidence, the least supported. CHI finding
The four questions, answered directly
Where the exchange lands.
- Which airline imposes the greatest documented customer hostility? Not determined, and this page does not name one. United holds the highest published CHI at 63. But United’s own scorecard records that, on that assessment’s independent evidence, United sits below Delta on hostility — and that the pair cannot be reconciled numerically, because the live Delta card publishes its CHI as reserved pending its own comparison module.A4A1 Naming a most-hostile carrier here would require completing Delta’s assessment, which is not this page’s job.
- Which delivers the strongest customer value? On the published figures, Emirates at CVI 85 — a working score, not publication-locked — ahead of Singapore Airlines at 84, which is frozen, and United at 74. The one-point gap between the top two is not a ranking: Singapore leads on the ordinary economy proposition and on award economics, Emirates on premium-hardware scale, the ground bundle, retrofit coverage and connectivity rollout.A2A3A84A85 Delta publishes no CVI at all.A1
- Where does delivered value offset extraction, and where does it fail to? It offsets substantially at Emirates and Singapore Airlines, both at CFS +37. It very nearly fails to at United, at +11 — one of the strongest customer-value systems on this index sitting almost exactly on top of one of its most sophisticated extraction architectures.A4 At Delta the question cannot be answered, because only one side of the exchange is scored. No airline in this set is CFS-negative, which distinguishes the cohort sharply from the dating cohort, where three of five extract more than they deliver.A5
- Which most closely approaches a balanced exchange? In the methodology’s own terms, United, at +11 — inside the band the site defines as finely balanced, and the only carrier here whose own page uses that verdict.A4A5 That is a description, not a compliment: a balanced exchange at this level means the extraction is large enough to consume a strong value delivery almost entirely. The customers who come out furthest ahead fly Emirates and Singapore Airlines.
- Which creates the widest gap between extraction and delivered value? Measured as value exceeding extraction, Emirates and Singapore Airlines are tied at +37, from opposite directions — Emirates extracting more and holding position, Singapore extracting less and deteriorating faster.A2A3 Measured as extraction exceeding value, no airline in this set qualifies. The widest gap in the direction the phrase usually implies does not exist here, and inventing one would misdescribe the evidence.
Four airlines spent a decade making the aircraft better and the ticket narrower. The only real disagreement between them is about what you have to be before the ticket works.
Evidence treatment
What this page refuses to collapse.
Every statement above is drawn from the four published CHI assessments and the source ledgers behind two of them. A comparison page is the easiest place in an index to lose precision, because compression rewards the strong sentence over the accurate one. These are the compressions this page declined to make.
Distinctions carried forward from the assessments
- Not establishedCustomer hostility is not weak customer value, and this page never trades one for the other. Emirates and Singapore Airlines both carry Concerning CHI scores alongside the two highest CVI scores in the set. United carries the highest published hostility here and a Strong CVI. The two indices are scored separately by design and reconcile only through CFS; nothing above nets them during scoring.A2A3A4A5
- Not establishedExtraction is not operational failure. Delta’s July 2024 CrowdStrike recovery is expressly not counted as hostility on its own page, and it is not counted as hostility here.A1 United’s 2023 Newark meltdown is scored for the internal crew-scheduling collapse and the response, not for the weather and air-traffic control that triggered it.A4 A bad week is not an extraction finding.
- CHI findingDeliberate monetization is not genuine scarcity. Sky Club overcrowding is real and documented, not manufactured — the finding is that $75,000 of annual card spend overrides the visit cap.A1 Singapore’s flagship-cabin scarcity is a genuine production constraint and was tested and not established as artificial.A3 United’s Economy Plus earns its price; its preferred seating does not, because unsold preferred inventory releases free at check-in.A4 Three different answers, and the page keeps all three.
- Announced ≠ implementedAnnouncements are not delivery, in either direction. United’s Starlink agreement is the largest of its kind and its installed coverage is roughly 17% of the mainline fleet; the 1,000-aircraft figure is a target, not a status.A4A20A31 Emirates’ free Starlink is a rollout running to mid-2027.A84 Singapore Airlines’ S$1.1bn retrofit slipped to the first quarter of 2027.A3A49A50 Each is recorded at the stage it has actually reached.
- Historical, not currentDated evidence is labelled as dated. United’s worst-of-the-Big-4 complaint rate is 2023 data — the last full per-airline series — and must not be read as current; its own page says so.A4A28 The 2017 Dao incident is one of the things United demonstrably fixed, and its assessment treats the anecdote as one of the weakest arguments against the modern airline.A4 Delta’s 2008 bag fee is a baseline, not a finding.
- Not establishedThe United “848 versus 5” figure is award availability, and nothing else. It is the count of saver business award flights to Europe visible to a cardholder versus visible to a non-cardholder on a single measured day. It is not a count of card acquisitions, and it is not a count of redemptions. It is a single-day snapshot of a live inventory system taken by a specialist award-search tool, not an audited longitudinal series, and its own page says so.A4A10
- FactThe MileagePlus 71% figure measures the composition of 2019 mileage-sales cash flow. In 2019, 71% of cash flow from mileage sales came from miles purchased by third-party partners, primarily Chase. It is not a statement about the share of miles issued, nor about the share of miles going to third parties, and this page uses no formulation that changes that denominator or scope.A4A8
- Not establishedUnited is not given the monopolist label that circulates about Newark. The Department of Justice alleged in November 2015 that United’s control of 73% of Newark slots gave it monopoly power, and United abandoned the transaction in April 2016. The shorthand label widely attributed to the Department appears nowhere in the release, the complaint or the Assistant Attorney General’s remarks; the United assessment describes the allegation rather than quoting it, and so does this page.A4
- FactThe Excursionist Perk was announced on 22 May 2025 and terminated on 21 August 2025. The termination date is the one used wherever the Access Downgrading finding is discussed. It is not a live benefit and is not credited to United anywhere on this page.A4
- FactThe Fifth Circuit vacated the 2024 fee-disclosure rule on 3 February 2026. That is the disposition used throughout. This page does not date the matter to the earlier remand posture; where an older comparator source carries that earlier framing, the later disposition recorded on the United assessment governs.A4A30
- ProvisionalPolaris Base, Standard and Flexible is used as a live United fare structure, on United’s own 3 April 2026 release and supporting coverage. A comparator research stream could not independently verify the tiering and flagged it for reconciliation before use in any four-airline table; the primary announcement resolves it, and it is used here on that basis.A4A33A32
- CHI findingDelta is not assigned a comparative CHI value on this page. The frozen Delta assessment publishes its CHI as reserved.A1 A working comparator figure for Delta appears inside the Singapore assessment’s internal ordering, expressly flagged there as a working comparator rather than a published scoreA3; the United assessment records the same reconciliation and states that the live Delta card publishes its CHI as reserved.A4 This page follows the frozen page and the later correction, and adopts no number.
- Recorded, not resolvedThe disputed United premium comparator is preserved, not silently replaced. The United assessment uses only the full-year 2025 premium-revenue figure, because the fourth-quarter figure in the earnings release differs from the one carried in the controlling research dossier. This page uses the full-year figure and reproduces the distinction rather than substituting the conflicting quarterly value.A4A36
- Standing itemThe congressional surveillance-pricing inquiry is open and unanswered. Letters went to eight carriers including United on 11–12 August 2026, with responses requested by 25 August 2026. No United response had surfaced as at that assessment’s publication, and this page does not speculate that one exists.A4A35 It is a future-update item for the United file; it does not qualify or block anything in this comparison.
- FactUnited’s wheelchair-fit finding is reproduced as its page records it. The 2023 DOT accessibility agreement included a flight-search filter that prioritises aircraft whose cargo door fits the customer’s wheelchair. That is the source-supported description, and the page’s wider evidence caveat — that current united.com policy pages could not be read directly and current-rule claims are triangulated from specialist sources and United’s static press archive — travels with it.A4A26
- Not establishedScored evidence is not contextual evidence. Singapore Airlines’ air-cargo cartel record is recorded on its page as a governance and trust datapoint and expressly not as evidence about passenger treatment; it is not used here as a customer-hostility finding.A3 The personal-experience note on the United page is excluded by its own label and contributes nothing to either score; it contributes nothing here either.A4
Methodology and limitations
What the three numbers are, and what this page could not do with them.
CHI — Customer Hostility Index
What the commercial relationship takes and restricts, scored across five dimensions to 100 points: Revenue Extraction 25, Behavioral Manipulation 25, Customer Restriction 20, Information & Privacy 15, Trust & Transparency 15. Patterns describe behaviour; the dimensions score harm.A5
CVI — Customer Value Index
What the product actually delivers, scored across five dimensions to 100 points: Core Product Value 30, Feature & Capability Improvements 25, Technology & Performance 20, Trust, Safety & Reliability 15, Innovation 10.A5
CFS — Customer Fairness Score
CFS = CVI − CHI. It measures whether the company or the customer benefits more from the overall relationship. The two indices are never netted during scoring; they reconcile only here. Bands: ≥ 35 strongly customer-favorable · 15 to 34 value exceeds hostility · −14 to +14 finely balanced · −35 to −15 extraction exceeds delivered value · ≤ −35 severely customer-hostile.A5
Every score on this page is a frozen output of an individual company investigation. No airline is re-scored here, no dimension is recomputed, and no new number is assigned. Where the four assessments disagree with one another, the disagreement is shown rather than arbitrated. Two anti-inflation rules from the methodology apply throughout the underlying assessments and are carried here unaltered: anti-double-counting, under which one action is scored in one primary dimension however many sections it illustrates; and FIXED UNDER PRESSURE, under which a correction is credited in full where customers receive the benefit today, with the pressure that produced it recorded separately.A3A4A5
Material limits.
- The four scores do not share a publication status, and are not interchangeable. Singapore Airlines’ figures are frozen as at 23 August 2026. United’s are provisional as at 26 August 2026, pending a cross-company freeze pass. Emirates’ are working scores, independently blind-audited and confirmed without revision but explicitly not publication-locked. Delta’s CHI is reserved and no CVI exists. A four-way numeric ranking would imply a comparability that the statuses do not support, and none is offered.A1A2A3A4
- Delta is a one-sided file. Only the hostility side of Delta has been assessed, so no CFS is calculable and Delta cannot enter any value or outcome comparison. Its assessment withholds a number deliberately, on the stated ground that publishing one would imply a completed comparative judgement its page does not make.A1
- Emirates is the thinnest evidence base of the four. Four matrix cells are marked not assessed for Emirates — award-chart publication, operational reliability, accessibility, and its home regulatory floor. Those are gaps in the frozen materials, not clearances, and no inference is drawn from them in either direction.A2
- The identical +37 scores carry different labels on their own pages. Emirates’ page calls it Customer-Friendly; Singapore’s calls it Strongly Customer-Favorable; the methodology band for CFS ≥ 35 is strongly customer-favorable. Each page’s own wording is reproduced rather than harmonised, because harmonising it would edit a frozen output.A2A3A5
- Route length, network shape and jurisdiction are not normalized. Comparing Emirates or Singapore long-haul inclusions mechanically against a short US domestic fare is analytically invalid, and both non-US assessments say so. A matched-route panel does not exist, and this page does not simulate one: fare-architecture comparisons here are structural, not price-for-price.A2A3
- Dimension composition is not read across. Emirates and Singapore Airlines both score Revenue Extraction 14/25 from materially different behaviour. Headline totals are comparable; a dimension-by-dimension reading across four carriers is coarser than the numbers make it look.A2A3
- Two of the four underlying files carry their own evidence caveats, and they travel with every claim taken from them. The United assessment records that united.com’s current policy pages are JavaScript-rendered and could not be read directly, so its current-rule claims are triangulated from 2025–2026 specialist sources and United’s static press archive.A4 The Singapore assessment records that its own realized customer-service harm is unresolved rather than excluded, and that several litigation matters are filed and pending with allegations only.A3
- Airline pricing, fare rules, programme terms and connectivity coverage change frequently. Every figure here is dated to the position recorded in the frozen assessments at August 2026 and should be reconfirmed before republication.
Source ledger
Every material claim on this page is traceable.
CHI = a published CHI assessment on this site, treated here as frozen evidence · P = primary (company, government, court, regulator or programme terms) · S = secondary (press and specialist outlets) · T = tertiary or aggregator. Entries A6 onward are carried unchanged from the numbered source ledgers of the United and Singapore Airlines assessments, with their original identifiers preserved so that citations remain comparable across the CHI airline set. No new source is introduced by this page, and no claim here rests on evidence that is not already published on one of the four company pages.
delta.html
The frozen Delta assessment. Every Delta claim on this page resolves here; the Delta page carries no separate numbered ledger.↩
emirates.html
The frozen Emirates assessment, including the CHI dimension breakdown and the CVI sub-scores quoted on this page.↩
singapore-airlines.html
The frozen Singapore Airlines assessment and its 106-entry source ledger.↩
united.html
The frozen United assessment and its 56-entry source ledger.↩
methodology.html
Dimension weights, the anti-double-counting rule, and the CFS classification bands used throughout this page.↩
https://united.mediaroom.com/2017-02-21-United-Airlines-Launches-New-Basic-Economy-Fare-for-Twin-Cities-Travel
Basic Economy launch terms; the domestic full-size carry-on restriction. Carried from the United assessment source ledger (U3).↩
https://www.sec.gov/Archives/edgar/data/100517/000110465920073190/tm2022354d3_8k.htm
MileagePlus appraisal and the “limit redemptions or devalue” language. Carried from the United assessment source ledger (U4).↩
https://www.sec.gov/Archives/edgar/data/100517/000110465920073190/tm2022354d3_ex99-1.htm
The 2019 mileage-sales cash-flow composition figure. Carried from the United assessment source ledger (U5).↩
https://united.mediaroom.com/2020-07-21-United-Airlines-Took-Industry-Leading-Steps-to-Manage-Historic-Impact-of-COVID-19-in-Q2
The $6.8 billion raised against the MileagePlus programme. Carried from the United assessment source ledger (U6).↩
https://frequentmiler.com/uniteds-amazing-cardholder-award-availability/
The single-day saver-award inventory measurement, cardholder versus non-cardholder. Carried from the United assessment source ledger (U7).↩
https://united.mediaroom.com/2026-02-19-United-Gives-MileagePlus-Credit-Cardholders-More-Miles,-Exclusive-Flight-Discounts
February 2026 cardholder award discounts and earning changes. Carried from the United assessment source ledger (U8).↩
https://viewfromthewing.com/united-airlines-slashes-mileageplus-earnings-up-to-40-and-hikes-award-prices-if-you-dont-have-their-credit-card/
The April 2026 earning cut for members without a United card. Carried from the United assessment source ledger (U9).↩
https://united.mediaroom.com/2017-04-27-United-Airlines-Announces-Changes-to-Improve-Customer-Experience
The 27 April 2017 post-Dao reform package, including the $10,000 ceiling. Carried from the United assessment source ledger (U11).↩
https://liveandletsfly.com/united-compensation-limits/
Contemporaneous record of the 1 May 2020 reduction. Carried from the United assessment source ledger (U12).↩
https://www.federalregister.gov/documents/2024/04/26/2024-07177/refunds-and-other-consumer-protections
The DOT automatic-refund rule, April 2024. Carried from the United assessment source ledger (U16).↩
https://www.hsgac.senate.gov/wp-content/uploads/2024.11.25-Majority-Staff-Report-The-Skys-the-Limit-The-Rise-of-Junk-Fees-in-American-Travel-1.pdf
Senate junk-fee report: seat-fee revenue and excise-tax labelling. Carried from the United assessment source ledger (U17).↩
https://www.transportation.gov/airconsumer/airline-family-seating-dashboard
DOT family-seating dashboard: which carriers hold the guarantee. Carried from the United assessment source ledger (U19).↩
https://united.mediaroom.com/2019-06-10-United-Airlines-Makes-Connecting-the-World-Easier-Than-Ever-with-ConnectionSaver
ConnectionSaver. Carried from the United assessment source ledger (U21).↩
https://united.mediaroom.com/2020-08-30-United-Airlines-Permanently-Eliminates-Change-Fees
Permanent change-fee elimination, August 2020. Carried from the United assessment source ledger (U23).↩
https://united.mediaroom.com/2024-09-13-The-Inflight-Wi-Fi-Revolution-Now-Arriving-United-Signs-Starlink-Deal-to-Provide-Industry-Leading-Connectivity-in-the-Sky-For-Free
The Starlink agreement and its scale. Carried from the United assessment source ledger (U25).↩
https://united.mediaroom.com/2024-06-07-United-Launches-Airline-Industrys-First-Media-Network
Kinective Media: advertising inside the paid travel relationship. Carried from the United assessment source ledger (U26).↩
https://united.mediaroom.com/2023-02-20-United-Makes-It-Easier-for-Families-to-Sit-Together
The family-seating seat-map mechanism, including on Basic Economy. Carried from the United assessment source ledger (U27).↩
https://united.mediaroom.com/2023-06-22-Uniteds-New-App-Feature-Helps-Customers-Re-book-and-Receive-Meal-and-Hotel-Vouchers-Automatically
App-issued rebooking options and automatic meal and hotel vouchers. Carried from the United assessment source ledger (U28).↩
https://united.mediaroom.com/2019-08-28-United-Airlines-Announces-MileagePlus-Miles-Never-Expire
MileagePlus miles never expire. Carried from the United assessment source ledger (U30).↩
https://viewfromthewing.com/united-eliminating-award-charts-and-close-in-booking-fees/
Award-chart abolition, November 2019. Carried from the United assessment source ledger (U31).↩
https://united.mediaroom.com/2023-09-28-United-Improves-Travel-Experience-For-Customers-Who-Use-Personal-Wheelchairs
The 2023 DOT accessibility agreement and the wheelchair-fit flight-search filter. Carried from the United assessment source ledger (U32).↩
https://downloads.regulations.gov/DOT-OST-2016-0002-0002/attachment_1.pdf
The 2016 $2 million wheelchair and boarding-assistance consent order. Carried from the United assessment source ledger (U35).↩
https://pirg.org/edfund/resources/plane-truth-2024/
Per-airline complaint rates, 2023 — the last full per-airline series. Carried from the United assessment source ledger (U37).↩
https://thepointsguy.com/news/united-airlines-raises-checked-bag-fees
The April 2026 United checked-bag increase. Carried from the United assessment source ledger (U40).↩
https://www.federalregister.gov/documents/2026/07/02/2026-13450/increasing-flexibility-on-disclosure-of-airline-ancillary-fees
The Fifth Circuit’s 3 February 2026 vacatur of the 2024 fee-disclosure rule. Carried from the United assessment source ledger (U41).↩
https://unitedstarlinktracker.com/
Starlink installed-fleet coverage snapshot. Carried from the United assessment source ledger (U44).↩
https://www.afar.com/magazine/united-just-announced-new-fare-tiers-in-business-class
What Polaris Base strips. Carried from the United assessment source ledger (U48).↩
https://united.mediaroom.com/2026-04-03-United-to-Introduce-Tiered-Fare-Categories,-Giving-Customers-More-Options-Across-Every-Type-of-Ticket
United’s 3 April 2026 tiered-fare announcement. Carried from the United assessment source ledger (U49).↩
https://onemileatatime.com/guides/united-airlines-basic-economy/
The unpublished Basic Economy cancellation fee. Carried from the United assessment source ledger (U50).↩
https://democrats-energycommerce.house.gov/media/press-releases/pallone-presses-us-airlines-answers-surveillance-pricing
The Pallone surveillance-pricing letters, 11–12 August 2026. Carried from the United assessment source ledger (U51).↩
https://ir.united.com/news-releases/news-release-details/united-airlines-q4-and-full-year-eps-beat-wall-street
Full-year 2025 premium revenue and co-brand remuneration. Carried from the United assessment source ledger (U52).↩
https://www.fool.com/earnings/call-transcripts/2026/04/21/united-airlines-ual-q4-2025-earnings-transcript/
Q4 2025 earnings call: premium revenue against standard and Basic Economy revenue. Carried from the United assessment source ledger (U53).↩
https://www.transportation.gov/airconsumer/air-travel-consumer-report-archive
DOT oversales tables behind the involuntary-denied-boarding series. Carried from the United assessment source ledger (U54).↩
https://www.transportation.gov/resources/individuals/aviation-consumer-protection/air-travel-consumer-reports-2025
2025 mishandled-baggage position. Carried from the United assessment source ledger (U55).↩
https://aviationa2z.com/index.php/2025/12/07/united-restricts-polaris-saver-awards-to-elites-and-cobranded-cardholders/
Polaris saver award space moved into the card- and status-gated bucket. Carried from the United assessment source ledger (U56).↩
https://www.aerolopa.com/sq-77w
777-300ER cabin layout: 3-3-3 economy. Carried from the Singapore Airlines assessment source ledger (S12).↩
https://mainlymiles.com/fleet-a350-900/
Pitch and width by aircraft type. Carried from the Singapore Airlines assessment source ledger (S13).↩
https://www.singaporeair.com/en_UK/us/flying-withus/dining/economy-class-meals-for-short-haul-flights/
Hot meals and free alcohol on every economy fare. Carried from the Singapore Airlines assessment source ledger (S19).↩
https://www.singaporeair.com/en_UK/us/flying-withus/fare-types/
Fare types and the pre-purchase fare-comparison grid. Carried from the Singapore Airlines assessment source ledger (S23).↩
https://www.singaporeair.com/en_UK/us/travel-info/baggage/checked-baggage/
Checked-baggage allowances by fare. Carried from the Singapore Airlines assessment source ledger (S24).↩
https://www.singaporeair.com/en_UK/us/corporate/newsroom/press-release/2023/April-June/ne0523-230531/
Free all-cabin Wi-Fi from July 2023, conditioned on KrisFlyer enrolment. Carried from the Singapore Airlines assessment source ledger (S26).↩
https://milelion.com/2025/11/12/singapore-airlines-inflight-connectivity-wi-fi-guide/
Measured connectivity speeds. Carried from the Singapore Airlines assessment source ledger (S27).↩
https://www.executivetraveller.com/news/best-singapore-airlines-business-class-seats
Five business-class products under one cabin label. Carried from the Singapore Airlines assessment source ledger (S28).↩
https://www.singaporeair.com/en_UK/sg/corporate/newsroom/press-release/2024/October-December/ne1124-241104/
The S$1.1bn A350 cabin retrofit. Carried from the Singapore Airlines assessment source ledger (S29).↩
https://milelion.com/2026/05/05/confirmed-singapore-airlines-new-first-and-business-class-seats-delayed-to-2027/
The retrofit slipping to 2027; Business seat-selection withdrawal. Carried from the Singapore Airlines assessment source ledger (S30).↩
https://www.singaporeair.com/en_UK/us/global_footer/conditions-carriage/
Conditions of Carriage: carrier-elective remedies, denied boarding, downgrades. Carried from the Singapore Airlines assessment source ledger (S32).↩
https://milelion.com/2017/12/15/breaking-major-changes-singapore-airlines-announced-today/
The 2018 introduction of seat-selection fees. Carried from the Singapore Airlines assessment source ledger (S42).↩
https://mainlymiles.com/2021/11/15/singapore-airlines-quietly-increases-seat-selection-fees/
The 2021 unannounced seat-fee increase. Carried from the Singapore Airlines assessment source ledger (S43).↩
https://mainlymiles.com/2024/07/01/singapore-airlines-hikes-seat-selection-fees/
The 2024 unannounced seat-fee increase. Carried from the Singapore Airlines assessment source ledger (S44).↩
https://milelion.com/2025/12/22/guide-singapore-airlines-seat-selection-fees/
Seat-selection fee bands; seats free at online check-in. Carried from the Singapore Airlines assessment source ledger (S45).↩
https://milelion.com/2026/05/19/singapore-airlines-hikes-ticket-cancellation-fees-by-up-to-100/
The 28 April 2026 cancellation-fee increases and the no-show disclosure change. Carried from the Singapore Airlines assessment source ledger (S47).↩
https://milelion.com/2026/06/12/how-do-singapore-airlines-no-show-fees-work/
No-show fees and most-restrictive-rule inheritance. Carried from the Singapore Airlines assessment source ledger (S48).↩
https://www.singaporeair.com/saar5/pdf/flying-withus/lounge/SilverKris-Lounge-and-KrisFlyer-Gold-Lounge-Access.pdf
Lounge access rules — no paid lounge product at any price. Carried from the Singapore Airlines assessment source ledger (S51).↩
https://mainlymiles.com/what-to-do-with-expiring-krisflyer-miles/
KrisFlyer 36-month expiry mechanics. Carried from the Singapore Airlines assessment source ledger (S56).↩
https://milelion.com/2025/12/29/what-to-do-with-expiring-krisflyer-miles/
The once-only paid extension and its price. Carried from the Singapore Airlines assessment source ledger (S57).↩
https://mainlymiles.com/2026/04/17/complete-guide-to-the-pps-club-and-solitaire-pps-club-2/
PPS Club qualification: the S$25,000 premium-cabin spend threshold. Carried from the Singapore Airlines assessment source ledger (S58).↩
https://onemileatatime.com/guides/airline-miles-expire/
Expiry positions across the four programmes. Carried from the Singapore Airlines assessment source ledger (S59).↩
https://loyaltylobby.com/2026/08/23/emirates-skywards-shortens-miles-expiry-by-1-to-12-months-for-miles-earned-from-june-1-2027/
Emirates Skywards birthday-month mechanics and the June 2027 change. Carried from the Singapore Airlines assessment source ledger (S60).↩
https://milelion.com/2025/08/25/singapore-airlines-krisflyer-devaluation-coming-on-1-november-2025/
The November 2025 KrisFlyer devaluation, notice period and the “Access” tier. Carried from the Singapore Airlines assessment source ledger (S64).↩
https://onemileatatime.com/news/singapore-airlines-krisflyer-limits-award-searches-members-without-miles/
The July 2026 zero-balance award-search block. Carried from the Singapore Airlines assessment source ledger (S67).↩
https://viewfromthewing.com/partner-award-redemptions-singapore-airlines-will-no-longer-fuel-surcharges-either/
No carrier surcharges on any KrisFlyer award since March 2017. Carried from the Singapore Airlines assessment source ledger (S71).↩
https://mainlymiles.com/2026/08/14/krisflyer-spontaneous-escapes-september-2026/
Spontaneous Escapes: the permanent monthly 30%-off Saver sale. Carried from the Singapore Airlines assessment source ledger (S73).↩
https://onemileatatime.com/guides/value-miles-points/
Independent per-mile valuations of the four programmes. Carried from the Singapore Airlines assessment source ledger (S74).↩
https://www.mot.gov.sg/news-resources/newsroom/written-reply-by-minister-for-transport-khaw-boon-wan-to-parliamentary-question-on-facilitating-hassle-free-compensation-by-singapore-based-airlines-to-travellers-for-significant-flight-delays/
Singapore MOT declining a passenger-rights statute, February 2019. Carried from the Singapore Airlines assessment source ledger (S75).↩
https://www.mot.gov.sg/news-resources/newsroom/written-reply-to-parliamentary-question-on-introducing-regulations-for-seamless-refunds-for-significant-flight-delays-based-on-international-norms/
Singapore MOT declining again, October 2024. Carried from the Singapore Airlines assessment source ledger (S76).↩
https://milelion.com/2020/04/20/am-i-eligible-for-a-refund-a-guide-to-singapore-airlines-covid-19-travel-waiver-policy/
The April 2020 refund posture and credit bonuses. Carried from the Singapore Airlines assessment source ledger (S80).↩
https://www.mot.gov.sg/news/details/written-reply-to-parliamentary-question-on-flights-affected-by-crowdstrike-outage-and-enhancing-resilience-of-singapore's-air-hub-status-in-face-of-such-threats
Changi flight impact during the July 2024 CrowdStrike outage. Carried from the Singapore Airlines assessment source ledger (S85).↩
https://www.asiaone.com/singapore/singapore-airlines-fourth-asia-pacific-punctuality-cirium-2025
Cirium Asia-Pacific punctuality rankings, 2024 and 2025. Carried from the Singapore Airlines assessment source ledger (S87).↩
https://www.transportation.gov/sites/dot.gov/files/2025-04/December%202024%20Consumer%20Submission%20Data.pdf
US DOT consumer submissions, December 2024, by carrier. Carried from the Singapore Airlines assessment source ledger (S94).↩
https://feeds.bbci.co.uk/news/articles/ce99yy216l1o
The SQ321 response within 24 hours. Carried from the Singapore Airlines assessment source ledger (S106).↩
https://www.malaymail.com/amp/news/singapore/2024/06/11/singapore-airlines-offers-us10000-in-compensation-to-turbulence-flight-passengers/139141
The SQ321 compensation offers of 11 June 2024. Carried from the Singapore Airlines assessment source ledger (S107).↩
https://mainlymiles.com/2025/06/30/singapore-airlines-fleet-june-2025/
Singapore Airlines fleet age. Carried from the Singapore Airlines assessment source ledger (S132).↩
https://www.singaporeair.com/en_UK/us/travel-info/special-assistance/travelling-with-children/
Free advance seat selection for children on every Singapore Airlines fare. Carried from the Singapore Airlines assessment source ledger (S146).↩
https://www.emirates.com/us/english/book/about-booking-online/emirates-seat-selection/
Emirates seat-selection charges, including on the cheapest fares. Carried from the Singapore Airlines assessment source ledger (S150).↩
https://onemileatatime.com/emirates-business-class-special-fare/
Emirates Business Special: what the fare excludes. Carried from the Singapore Airlines assessment source ledger (S152).↩
https://onemileatatime.com/news/emirates-increases-fuel-surcharges/
Emirates carrier surcharges on its own awards. Carried from the Singapore Airlines assessment source ledger (S153).↩
https://onemileatatime.com/news/emirates-skywards-devalues-miles/
The May 2026 Skywards devaluation. Carried from the Singapore Airlines assessment source ledger (S154).↩
https://loyaltylobby.com/2025/05/10/emirates-restricts-first-class-awards-only-to-skywards-elite-members-from-may-12-2025/
First Class Classic Rewards restricted to Skywards elite tiers, May 2025. Carried from the Singapore Airlines assessment source ledger (S155).↩
https://www.emirates.com/media-centre/gaining-speed-at-40000-feet-emirates-set-to-operate-the-worlds-largest-starlink-enabled-international-wide-body-fleet-bringing-ultra-fast-connectivity-on-232-boeing-777-and-a380-aircraft/
The Emirates Starlink rollout across 232 aircraft to mid-2027. Carried from the Singapore Airlines assessment source ledger (S156).↩
https://www.emirates.com/media-centre/100-aircraft-44-months-and-44-million-man-hours-emirates-retrofit-programme-marks-major-milestone/
The Emirates retrofit programme past its 100th aircraft. Carried from the Singapore Airlines assessment source ledger (S157).↩
https://seatmaps.com/airlines/ek-emirates/boeing-777-300er/
Emirates 777-300ER economy seat dimensions. Carried from the Singapore Airlines assessment source ledger (S158).↩
https://onemileatatime.com/guides/delta-basic-economy/
Delta Basic Economy terms. Carried from the Singapore Airlines assessment source ledger (S159).↩
https://onemileatatime.com/news/delta-increases-checked-bag-fees/
The April 2026 Delta checked-bag increase and the industry-wide round. Carried from the Singapore Airlines assessment source ledger (S161).↩
https://frequentmiler.com/united-mileageplus-complete-guide/
MileagePlus programme mechanics, including the no-expiry position. Carried from the Singapore Airlines assessment source ledger (S165).↩
https://onemileatatime.com/guides/united-airlines-basic-economy/
United Basic Economy terms. Carried from the Singapore Airlines assessment source ledger (S166).↩
https://www.transportation.gov/airconsumer/airline-family-seating-dashboard
DOT family-seating dashboard (used here only for the family-seating guarantee). Carried from the Singapore Airlines assessment source ledger (S168).↩
Delta and Emirates claims resolve to their own frozen assessments (A1 and A2), which do not carry separate numbered ledgers; the comparator entries in the Singapore ledger supply the dated external evidence for the Delta and Emirates facts used in cross-carrier rows. Where an older comparator entry and a later assessment disagree on the disposition of the same regulatory matter, the later disposition governs and is cited accordingly.
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