UK FLIGHT DELAY INDEX

derived from CAA punctuality statistics for UK reporting airports

How often are these flights late or cancelled?

Emirates

In the twelve months from July 2025 to June 2026, 31.4% of 6,737 movements arriving into the UK were disrupted — more than fifteen minutes late or cancelled at short notice.

Put the other way round, 68.6% of 6,737 movements met the fifteen-minute convention. These are historical observations, not a forecast.

Definitions, denominators and limits

Arrivals into UK reporting airports only unless labelled departures. Denominator: operated movements plus short-notice cancellations (M+C). A movement is not a scheduled flight. Unmatched records are data quality, not outcomes. Cells below twenty movements are suppressed; twenty to forty-nine are descriptive and not ranked.

Source: CAA punctuality statistics · snapshot 17/08/2026 10:24 · method route-record-v2.1 · Versioned claims, formulas and entity mapping.

0 operations (0.00%) excluded because their published percentages could not be reconciled to whole numbers. Excluded operations enter neither the numerator nor the denominator. Outcome figures and comparisons are unavailable when the excluded share exceeds fifteen percent.

The four numbers at a glance

31.4% of 6,737 movements were disrupted over July 2025 to June 2026.

Average delay covers delayed movements only. Its range reflects rounded source means and the unknown count of exactly punctual movements.

DisruptionShort-notice cancellationsDelay among delayed movementsOver three hours
31.4% of 6,737 movements3.7% of 6,737 movements23.9–51.7 minutes; delayed denominator 1,864–3,7610.5% of 6,737 movements
Definitions, denominators and limits

Arrivals into UK reporting airports only unless labelled departures. Denominator: operated movements plus short-notice cancellations (M+C). A movement is not a scheduled flight. Unmatched records are data quality, not outcomes. Cells below twenty movements are suppressed; twenty to forty-nine are descriptive and not ranked.

When late, how late?

0.5% of 6,737 movements passed the three-hour mark.

The ladder shows how many movements crossed each threshold. Cancellations are separate: 3.7% of 6,737 movements.

DelayShare and sampleOne event per movements
More than 15 minutes27.7% of 6,737 movements3.6
More than 30 minutes12.9% of 6,737 movements7.8
More than 60 minutes3.7% of 6,737 movements26.8
More than 120 minutes1.1% of 6,737 movements92.3
More than 180 minutes0.5% of 6,737 movements198.1
More than 360 minutes0.1% of 6,737 movements673.7
Definitions, denominators and limits

Arrivals into UK reporting airports only unless labelled departures. Denominator: operated movements plus short-notice cancellations (M+C). A movement is not a scheduled flight. Unmatched records are data quality, not outcomes. Cells below twenty movements are suppressed; twenty to forty-nine are descriptive and not ranked.

Slightly late or occasionally a disaster?

1.1% of 6,737 movements passed two hours.

The histogram shows the published delay bands. Bucket shares use all reported operations, including unmatched records; cancellations are reported separately.

Nine delay buckets, minutes; share of all recorded operations>15 early92413.7%15–1 early1,80026.7%0–15 late1,89728.2%16–3099814.8%31–606159.1%61…1201782.6%121…180390.6%181…360240.4%>360100.1%D=6,737
Definitions, denominators and limits

Arrivals into UK reporting airports only unless labelled departures. Denominator: operated movements plus short-notice cancellations (M+C). A movement is not a scheduled flight. Unmatched records are data quality, not outcomes. Cells below twenty movements are suppressed; twenty to forty-nine are descriptive and not ranked.

Better or worse since the start of the archive?

Best month: Jun 2020, no events in 51 movements. Worst month: Mar 2026, 78.8% of 594 movements.

The line traces every month. Lower disruption is better; gaps are never zeros. Pandemic readings describe a different operating regime.

Monthly disruption share; gaps mean no published dataJan 2018: 37.8%; sample: 5372018Feb 2018: 24.5%; sample: 478Mar 2018: 31.5%; sample: 534Apr 2018: 20.6%; sample: 504May 2018: 9.3%; sample: 506Jun 2018: 3.9%; sample: 534Jul 2018: 12.8%; sample: 563Aug 2018: 19.8%; sample: 562Sep 2018: 23.3%; sample: 540Oct 2018: 17.0%; sample: 587Nov 2018: 7.8%; sample: 563Dec 2018: 21.7%; sample: 595Jan 2019: 32.1%; sample: 5892019Feb 2019: 26.0%; sample: 527Mar 2019: 39.1%; sample: 581Apr 2019: 24.1%; sample: 477May 2019: 11.2%; sample: 401Jun 2019: 11.4%; sample: 570Jul 2019: 16.3%; sample: 625Aug 2019: 21.4%; sample: 632Sep 2019: 25.5%; sample: 601Oct 2019: 21.8%; sample: 616Nov 2019: 9.3%; sample: 600Dec 2019: 15.7%; sample: 619Jan 2020: 33.2%; sample: 6202020Feb 2020: 33.8%; sample: 583Mar 2020: 12.3%; sample: 438Apr 2020: suppressed: fewer than twenty movements×May 2020: suppressed: fewer than twenty movements×Jun 2020: 0.0%; sample: 51Jul 2020: 10.4%; sample: 115Aug 2020: 7.7%; sample: 142Sep 2020: 3.2%; sample: 154Oct 2020: 2.1%; sample: 191Nov 2020: 5.4%; sample: 168Dec 2020: 7.9%; sample: 242Jan 2021: 15.5%; sample: 2262021Feb 2021: suppressed: fewer than twenty movements×Mar 2021: suppressed: fewer than twenty movements×Apr 2021: suppressed: fewer than twenty movements×May 2021: suppressed: fewer than twenty movements×Jun 2021: 6.9%; sample: 58Jul 2021: 4.3%; sample: 94Aug 2021: 20.7%; sample: 140Sep 2021: 13.3%; sample: 203Oct 2021: 18.4%; sample: 332Nov 2021: 13.8%; sample: 333Dec 2021: 29.0%; sample: 369Jan 2022: 23.9%; sample: 3762022Feb 2022: 38.2%; sample: 359Mar 2022: 26.9%; sample: 405Apr 2022: 29.9%; sample: 408May 2022: 19.9%; sample: 422Jun 2022: 10.8%; sample: 407Jul 2022: 20.8%; sample: 432Aug 2022: 17.6%; sample: 459Sep 2022: 30.6%; sample: 441Oct 2022: 31.6%; sample: 503Nov 2022: 11.7%; sample: 472Dec 2022: 31.7%; sample: 526Jan 2023: 34.5%; sample: 5312023Feb 2023: 27.3%; sample: 477Mar 2023: 28.3%; sample: 530Apr 2023: 23.1%; sample: 510May 2023: 21.3%; sample: 558Jun 2023: 15.3%; sample: 542Jul 2023: 32.4%; sample: 559Aug 2023: 21.5%; sample: 558Sep 2023: 23.5%; sample: 540Oct 2023: 38.0%; sample: 560Nov 2023: 35.1%; sample: 562Dec 2023: 43.7%; sample: 581Jan 2024: 42.9%; sample: 5852024Feb 2024: 47.6%; sample: 544Mar 2024: 22.9%; sample: 581Apr 2024: 54.6%; sample: 573May 2024: 27.0%; sample: 589Jun 2024: 26.4%; sample: 572Jul 2024: 25.6%; sample: 589Aug 2024: 30.1%; sample: 589Sep 2024: 25.3%; sample: 570Oct 2024: 52.9%; sample: 586Nov 2024: 14.6%; sample: 569Dec 2024: 19.9%; sample: 588Jan 2025: 21.9%; sample: 5942025Feb 2025: 20.3%; sample: 532Mar 2025: 10.6%; sample: 592Apr 2025: 16.0%; sample: 570May 2025: 21.1%; sample: 589Jun 2025: 34.9%; sample: 571Jul 2025: 18.8%; sample: 592Aug 2025: 26.0%; sample: 589Sep 2025: 38.2%; sample: 570Oct 2025: 30.4%; sample: 595Nov 2025: 13.9%; sample: 596Dec 2025: 25.2%; sample: 615Jan 2026: 40.6%; sample: 6162026Feb 2026: 25.4%; sample: 579Mar 2026: 78.8%; sample: 594Apr 2026: 52.6%; sample: 409May 2026: 20.2%; sample: 515Jun 2026: 6.6%; sample: 467Pandemic regime Jun 2020Summer 2022 breakdown Jul 2022NATS system failure Aug 2023Heathrow fire closure Mar 2025100%0%
Every monthly observation
MonthDisruption on arrivals
Jan 201837.8% of 537 movements
Feb 201824.5% of 478 movements
Mar 201831.5% of 534 movements
Apr 201820.6% of 504 movements
May 20189.3% of 506 movements
Jun 20183.9% of 534 movements
Jul 201812.8% of 563 movements
Aug 201819.8% of 562 movements
Sep 201823.3% of 540 movements
Oct 201817.0% of 587 movements
Nov 20187.8% of 563 movements
Dec 201821.7% of 595 movements
Jan 201932.1% of 589 movements
Feb 201926.0% of 527 movements
Mar 201939.1% of 581 movements
Apr 201924.1% of 477 movements
May 201911.2% of 401 movements
Jun 201911.4% of 570 movements
Jul 201916.3% of 625 movements
Aug 201921.4% of 632 movements
Sep 201925.5% of 601 movements
Oct 201921.8% of 616 movements
Nov 20199.3% of 600 movements
Dec 201915.7% of 619 movements
Jan 202033.2% of 620 movements
Feb 202033.8% of 583 movements
Mar 202012.3% of 438 movements
Apr 2020suppressed: fewer than twenty movements
May 2020suppressed: fewer than twenty movements
Jun 2020no events in 51 movements
Jul 202010.4% of 115 movements
Aug 20207.7% of 142 movements
Sep 20203.2% of 154 movements
Oct 20202.1% of 191 movements
Nov 20205.4% of 168 movements
Dec 20207.9% of 242 movements
Jan 202115.5% of 226 movements
Feb 2021suppressed: fewer than twenty movements
Mar 2021suppressed: fewer than twenty movements
Apr 2021suppressed: fewer than twenty movements
May 2021suppressed: fewer than twenty movements
Jun 20216.9% of 58 movements
Jul 20214.3% of 94 movements
Aug 202120.7% of 140 movements
Sep 202113.3% of 203 movements
Oct 202118.4% of 332 movements
Nov 202113.8% of 333 movements
Dec 202129.0% of 369 movements
Jan 202223.9% of 376 movements
Feb 202238.2% of 359 movements
Mar 202226.9% of 405 movements
Apr 202229.9% of 408 movements
May 202219.9% of 422 movements
Jun 202210.8% of 407 movements
Jul 202220.8% of 432 movements
Aug 202217.6% of 459 movements
Sep 202230.6% of 441 movements
Oct 202231.6% of 503 movements
Nov 202211.7% of 472 movements
Dec 202231.7% of 526 movements
Jan 202334.5% of 531 movements
Feb 202327.3% of 477 movements
Mar 202328.3% of 530 movements
Apr 202323.1% of 510 movements
May 202321.3% of 558 movements
Jun 202315.3% of 542 movements
Jul 202332.4% of 559 movements
Aug 202321.5% of 558 movements
Sep 202323.5% of 540 movements
Oct 202338.0% of 560 movements
Nov 202335.1% of 562 movements
Dec 202343.7% of 581 movements
Jan 202442.9% of 585 movements
Feb 202447.6% of 544 movements
Mar 202422.9% of 581 movements
Apr 202454.6% of 573 movements
May 202427.0% of 589 movements
Jun 202426.4% of 572 movements
Jul 202425.6% of 589 movements
Aug 202430.1% of 589 movements
Sep 202425.3% of 570 movements
Oct 202452.9% of 586 movements
Nov 202414.6% of 569 movements
Dec 202419.9% of 588 movements
Jan 202521.9% of 594 movements
Feb 202520.3% of 532 movements
Mar 202510.6% of 592 movements
Apr 202516.0% of 570 movements
May 202521.1% of 589 movements
Jun 202534.9% of 571 movements
Jul 202518.8% of 592 movements
Aug 202526.0% of 589 movements
Sep 202538.2% of 570 movements
Oct 202530.4% of 595 movements
Nov 202513.9% of 596 movements
Dec 202525.2% of 615 movements
Jan 202640.6% of 616 movements
Feb 202625.4% of 579 movements
Mar 202678.8% of 594 movements
Apr 202652.6% of 409 movements
May 202620.2% of 515 movements
Jun 20266.6% of 467 movements
Definitions, denominators and limits

Arrivals into UK reporting airports only unless labelled departures. Denominator: operated movements plus short-notice cancellations (M+C). A movement is not a scheduled flight. Unmatched records are data quality, not outcomes. Cells below twenty movements are suppressed; twenty to forty-nine are descriptive and not ranked.

What did the big disruptions do here?

Each event is compared with the twelve preceding calendar months and the first later return to baseline.

A worse month is not proof the named event caused it. The open data carry no delay-cause field. Recovery is observed for at most eight subsequent months.

EventDirectionDisruption that monthBaseline beforeReturn to baseline
Pandemic regime · Jun 2020Arrivalsno events in 51 movementsno complete baselinenot enough data: needs a complete baseline and a publishable event month
Pandemic regime · Jun 2020Departures9.8% of 51 movementsno complete baselinenot enough data: needs a complete baseline and a publishable event month
Summer 2022 breakdown · Jul 2022Arrivals20.8% of 432 movements20.8% across 3,848 flightsreturned the next month
Summer 2022 breakdown · Jul 2022Departures62.3% of 432 movements30.1% across 3,862 flightsreturned after 4 months
NATS system failure · Aug 2023Arrivals21.5% of 558 movements25.5% across 6,108 flightsreturned the next month
NATS system failure · Aug 2023Departures43.1% of 561 movements42.0% across 6,110 flightsreturned the next month
Heathrow fire closure · Mar 2025Arrivals10.6% of 592 movements28.5% across 6,932 flightsreturned the next month
Heathrow fire closure · Mar 2025Departures13.7% of 592 movements38.7% across 6,934 flightsreturned the next month
Definitions, denominators and limits

Arrivals into UK reporting airports only unless labelled departures. Denominator: operated movements plus short-notice cancellations (M+C). A movement is not a scheduled flight. Unmatched records are data quality, not outcomes. Cells below twenty movements are suppressed; twenty to forty-nine are descriptive and not ranked.

Which time of year has been hardest?

Highest median: Jan, 34.5% across 7 months. Lowest median: Jun, 11.4% across 7 months.

Even the same calendar month differs across years. This is a record, not a forecast; pandemic years are excluded from the summaries.

Each cell is one calendar month of one year; the number is the share of that month’s arrivals that were disrupted. Darker means worse. A blank cell means no published data, not zero.

Seasonality: calendar month by year; share and nJanFebMarAprMayJunJulAugSepOctNovDec201932.1% of 589 movements26.0% of 527 movements39.1% of 581 movements24.1% of 477 movements11.2% of 401 movements11.4% of 570 movements16.3% of 625 movements21.4% of 632 movements25.5% of 601 movements21.8% of 616 movements9.3% of 600 movements15.7% of 619 movements202033.2% of 620 movements33.8% of 583 movements12.3% of 438 movementssuppressed: fewer than twenty movementssuppressed: fewer than twenty movementsno events in 51 movements10.4% of 115 movements7.7% of 142 movements3.2% of 154 movements2.1% of 191 movements5.4% of 168 movements7.9% of 242 movements202115.5% of 226 movementssuppressed: fewer than twenty movementssuppressed: fewer than twenty movementssuppressed: fewer than twenty movementssuppressed: fewer than twenty movements6.9% of 58 movements4.3% of 94 movements20.7% of 140 movements13.3% of 203 movements18.4% of 332 movements13.8% of 333 movements29.0% of 369 movements202223.9% of 376 movements38.2% of 359 movements26.9% of 405 movements29.9% of 408 movements19.9% of 422 movements10.8% of 407 movements20.8% of 432 movements17.6% of 459 movements30.6% of 441 movements31.6% of 503 movements11.7% of 472 movements31.7% of 526 movements202334.5% of 531 movements27.3% of 477 movements28.3% of 530 movements23.1% of 510 movements21.3% of 558 movements15.3% of 542 movements32.4% of 559 movements21.5% of 558 movements23.5% of 540 movements38.0% of 560 movements35.1% of 562 movements43.7% of 581 movements202442.9% of 585 movements47.6% of 544 movements22.9% of 581 movements54.6% of 573 movements27.0% of 589 movements26.4% of 572 movements25.6% of 589 movements30.1% of 589 movements25.3% of 570 movements52.9% of 586 movements14.6% of 569 movements19.9% of 588 movements202521.9% of 594 movements20.3% of 532 movements10.6% of 592 movements16.0% of 570 movements21.1% of 589 movements34.9% of 571 movements18.8% of 592 movements26.0% of 589 movements38.2% of 570 movements30.4% of 595 movements13.9% of 596 movements25.2% of 615 movements202640.6% of 616 movements25.4% of 579 movements78.8% of 594 movements52.6% of 409 movements20.2% of 515 movements6.6% of 467 movementsno datano datano datano datano datano data
Month-by-month table: median, observed range and sample
MonthMedianObserved rangeSample
Jan34.5%21.9–42.9%7 months, 3,828 flights
Feb26.0%20.3–47.6%7 months, 3,496 flights
Mar28.3%10.6–78.8%7 months, 3,817 flights
Apr24.1%16.0–54.6%7 months, 3,451 flights
May20.2%9.3–27.0%7 months, 3,580 flights
Jun11.4%3.9–34.9%7 months, 3,663 flights
Jul19.8%12.8–32.4%6 months, 3,360 flights
Aug21.4%17.6–30.1%6 months, 3,389 flights
Sep25.4%23.3–38.2%6 months, 3,262 flights
Oct31.0%17.0–52.9%6 months, 3,447 flights
Nov12.8%7.8–35.1%6 months, 3,362 flights
Dec23.4%15.7–43.7%6 months, 3,524 flights
Definitions, denominators and limits

Arrivals into UK reporting airports only unless labelled departures. Denominator: operated movements plus short-notice cancellations (M+C). A movement is not a scheduled flight. Unmatched records are data quality, not outcomes. Cells below twenty movements are suppressed; twenty to forty-nine are descriptive and not ranked.

Which routes have the best and worst record?

Lowest disruption: EDI ↔ DUBAI, 20.3% of 340 movements. Highest disruption: MAN ↔ DUBAI, 35.9% of 1,063 movements.

The airline table uses this carrier on each route; airport and country tables combine carriers. Each figure is arrivals into its UK airport. Only sufficiently large exact samples enter the ordered comparison.

Observed disruption share by optionEdi ↔ Dubai20.3% of 340 flightsNcl ↔ Dubai21.1% of 341 flightsStn ↔ Dubai24.4% of 630 flightsLgw ↔ Dubai32.4% of 1,100 flightsLhr ↔ Dubai35.6% of 2,252 flightsMan ↔ Dubai35.9% of 1,063 flights
All route comparisons and sample flags
RouteDisruptionCancellationsSample flag
EDI ↔ DUBAI20.3% of 340 movements2.9% of 340 movementsdescriptive comparison
NCL ↔ DUBAI21.1% of 341 movements2.6% of 341 movementsdescriptive comparison
Stansted ↔ Dubai24.4% of 630 movements5.6% of 630 movementsdescriptive comparison
Birmingham ↔ Dubai26.4% of 644 movements6.2% of 644 movementsdescriptive comparison
GLA ↔ DUBAI30.1% of 365 movements2.2% of 365 movementsdescriptive comparison
Gatwick ↔ Dubai32.4% of 1,100 movements5.7% of 1,100 movementsdescriptive comparison
Heathrow ↔ Dubai35.6% of 2,252 movements2.4% of 2,252 movementsdescriptive comparison
Manchester ↔ Dubai35.9% of 1,063 movements3.1% of 1,063 movementsdescriptive comparison
Definitions, denominators and limits

Arrivals into UK reporting airports only unless labelled departures. Denominator: operated movements plus short-notice cancellations (M+C). A movement is not a scheduled flight. Unmatched records are data quality, not outcomes. Cells below twenty movements are suppressed; twenty to forty-nine are descriptive and not ranked.

Which UK airports appear in this record?

8 published groups have enough arrivals to describe.

These operations are not matched for season, aircraft or time of day. The table makes no causal comparison.

UK airportDisruptionSample flag
Birmingham26.4% of 644 movementsdescriptive comparison
Edinburgh20.3% of 340 movementsdescriptive comparison
Glasgow30.1% of 365 movementsdescriptive comparison
Gatwick32.4% of 1,100 movementsdescriptive comparison
Heathrow35.6% of 2,252 movementsdescriptive comparison
Manchester36.0% of 1,064 movementsdescriptive comparison
Newcastle21.1% of 342 movementsdescriptive comparison
Stansted24.4% of 630 movementsdescriptive comparison
Definitions, denominators and limits

Arrivals into UK reporting airports only unless labelled departures. Denominator: operated movements plus short-notice cancellations (M+C). A movement is not a scheduled flight. Unmatched records are data quality, not outcomes. Cells below twenty movements are suppressed; twenty to forty-nine are descriptive and not ranked.

Arrivals vs departures

31.4% of 6,737 movements arrivals were disrupted, against 31.9% of 6,730 movements departures.

The directions have separate denominators. A departure delay does not establish late arrival at the final destination; legal conditions differ by direction and carrier.

Definitions, denominators and limits

Arrivals into UK reporting airports only unless labelled departures. Denominator: operated movements plus short-notice cancellations (M+C). A movement is not a scheduled flight. Unmatched records are data quality, not outcomes. Cells below twenty movements are suppressed; twenty to forty-nine are descriptive and not ranked.

Movements past the three-hour mark

0.5% of 6,737 movements were more than three hours late over July 2025 to June 2026.

Cancellation is counted separately and is not a three-hour delay. Monthly counts cannot establish a passenger claim.

Definitions, denominators and limits

Arrivals into UK reporting airports only unless labelled departures. Denominator: operated movements plus short-notice cancellations (M+C). A movement is not a scheduled flight. Unmatched records are data quality, not outcomes. Cells below twenty movements are suppressed; twenty to forty-nine are descriptive and not ranked.

Facts about this record

Emirates appears from Jan 2018 to Jun 2026 with 46,678 arrivals.

The bounds describe the published record, not every commercial service. Final point is not necessarily a nonstop destination.

Archive route pairs: 43.

Definitions, denominators and limits

Arrivals into UK reporting airports only unless labelled departures. Denominator: operated movements plus short-notice cancellations (M+C). A movement is not a scheduled flight. Unmatched records are data quality, not outcomes. Cells below twenty movements are suppressed; twenty to forty-nine are descriptive and not ranked.

What this data cannot tell you

Delay cause, individual passenger experience, commercial decisions and future performance are not established here.

Also absent are aircraft type, within-month time-of-day splits and cancellations made ahead of the short-notice reporting window.

0 operations (0.00%) excluded because their published percentages could not be reconciled to whole numbers. Excluded operations enter neither the numerator nor the denominator. Outcome figures and comparisons are unavailable when the excluded share exceeds fifteen percent.

Definitions, denominators and limits

Arrivals into UK reporting airports only unless labelled departures. Denominator: operated movements plus short-notice cancellations (M+C). A movement is not a scheduled flight. Unmatched records are data quality, not outcomes. Cells below twenty movements are suppressed; twenty to forty-nine are descriptive and not ranked.

Quick answers

These answers use the same populations and window as the tables above.

Every percentage retains its denominator.

How disrupted are these arrivals?

31.4% of 6,737 movements over July 2025 to June 2026.

How often are they cancelled?

3.7% of 6,737 movements at short notice.

How late is late?

23.9–51.7 minutes; delayed denominator 1,864–3,761

Are services improving?

The monthly line records past changes; it is not a forecast or a causal comparison.

Which routes are compared?

The route table uses separately identified UK airport and final-point pairs, with small samples flagged.

Does this cover my flight?

Only published aggregate movements; the circumstances of any individual flight are unknown.

Definitions, denominators and limits

Arrivals into UK reporting airports only unless labelled departures. Denominator: operated movements plus short-notice cancellations (M+C). A movement is not a scheduled flight. Unmatched records are data quality, not outcomes. Cells below twenty movements are suppressed; twenty to forty-nine are descriptive and not ranked.

How this was calculated

Source: CAA punctuality statistics · snapshot 17/08/2026 10:24 · method route-record-v2.1 · Versioned claims, formulas and entity mapping.

Integer bucket counts are recovered from rounding intervals over D=M+C+U with their sum constrained to M. Ambiguous counts remain ranges; failed reconciliation is quarantined.

Definitions, denominators and limits

Arrivals into UK reporting airports only unless labelled departures. Denominator: operated movements plus short-notice cancellations (M+C). A movement is not a scheduled flight. Unmatched records are data quality, not outcomes. Cells below twenty movements are suppressed; twenty to forty-nine are descriptive and not ranked.

Your trip has already gone wrong

The monthly line and events table show whether your month was typical or unusual in the published record.

Nothing here decides an individual case or what a passenger may be owed.

CAA: the official route to complain
Definitions, denominators and limits

Arrivals into UK reporting airports only unless labelled departures. Denominator: operated movements plus short-notice cancellations (M+C). A movement is not a scheduled flight. Unmatched records are data quality, not outcomes. Cells below twenty movements are suppressed; twenty to forty-nine are descriptive and not ranked.