UK FLIGHT DELAY INDEX

derived from CAA punctuality statistics for UK reporting airports

How often are these flights late or cancelled?

Aurigny Air Services

In the twelve months from July 2025 to June 2026, 25.6% of 5,891 movements arriving into the UK were disrupted — more than fifteen minutes late or cancelled at short notice.

Put the other way round, 74.4% of 5,891 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

25.6% of 5,891 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
25.6% of 5,891 movements4.7% of 5,891 movements32.0–71.9 minutes; delayed denominator 1,234–2,6001.0% of 5,891 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?

1.0% of 5,891 movements passed the three-hour mark.

The ladder shows how many movements crossed each threshold. Cancellations are separate: 4.7% of 5,891 movements.

DelayShare and sampleOne event per movements
More than 15 minutes20.9% of 5,891 movements4.8
More than 30 minutes13.3% of 5,891 movements7.5
More than 60 minutes6.6% of 5,891 movements15.3
More than 120 minutes2.9% of 5,891 movements34.2
More than 180 minutes1.0% of 5,891 movements96.6
More than 360 minutes0.1% of 5,891 movements841.6
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?

2.9% of 5,891 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 early5849.9%15–1 early2,43041.2%0–15 late1,36623.2%16–304487.6%31–604006.8%61…1202143.6%121…1801111.9%181…360540.9%>36070.1%D=5,896
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: Oct 2020, 3.1% of 64 movements. Worst month: Dec 2024, 51.0% of 482 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: 19.2%; sample: 3082018Feb 2018: 31.3%; sample: 326Mar 2018: 25.4%; sample: 389Apr 2018: 27.6%; sample: 464May 2018: 22.7%; sample: 436Jun 2018: 22.1%; sample: 420Jul 2018: 23.9%; sample: 452Aug 2018: 19.6%; sample: 494Sep 2018: 11.0%; sample: 391Oct 2018: 14.9%; sample: 363Nov 2018: 22.3%; sample: 332Dec 2018: 25.7%; sample: 374Jan 2019: 18.9%; sample: 3172019Feb 2019: 21.1%; sample: 323Mar 2019: 17.2%; sample: 367Apr 2019: 11.6%; sample: 370May 2019: 16.1%; sample: 436Jun 2019: 21.3%; sample: 507Jul 2019: 24.7%; sample: 558Aug 2019: 27.9%; sample: 594Sep 2019: 26.7%; sample: 517Oct 2019: 16.3%; sample: 472Nov 2019: 10.3%; sample: 448Dec 2019: 21.4%; sample: 434Jan 2020: 22.0%; sample: 4232020Feb 2020: 21.6%; sample: 412Mar 2020: 21.6%; sample: 222Apr 2020: 21.2%; sample: 33May 2020: 4.8%; sample: 21Jun 2020: 20.0%; sample: 25Jul 2020: 12.9%; sample: 31Aug 2020: 19.6%; sample: 56Sep 2020: 20.3%; sample: 59Oct 2020: 3.1%; sample: 64Nov 2020: 2.6%; sample: 39Dec 2020: 12.5%; sample: 48Jan 2021: 10.0%; sample: 302021Feb 2021: suppressed: fewer than twenty movements×Mar 2021: suppressed: fewer than twenty movements×Apr 2021: 4.5%; sample: 22May 2021: 10.9%; sample: 46Jun 2021: 14.1%; sample: 85Jul 2021: 14.9%; sample: 281Aug 2021: 12.7%; sample: 306Sep 2021: 11.2%; sample: 320Oct 2021: 16.3%; sample: 349Nov 2021: 8.1%; sample: 309Dec 2021: 16.0%; sample: 318Jan 2022: 12.2%; sample: 3032022Feb 2022: 24.0%; sample: 267Mar 2022: 10.0%; sample: 311Apr 2022: 16.3%; sample: 387May 2022: 12.1%; sample: 420Jun 2022: 17.7%; sample: 419Jul 2022: 22.0%; sample: 437Aug 2022: 26.9%; sample: 438Sep 2022: 23.9%; sample: 415Oct 2022: 19.2%; sample: 426Nov 2022: 14.3%; sample: 398Dec 2022: 32.0%; sample: 384Jan 2023: 18.0%; sample: 3782023Feb 2023: 16.6%; sample: 361Mar 2023: 21.8%; sample: 409Apr 2023: 16.0%; sample: 405May 2023: 17.2%; sample: 419Jun 2023: 26.8%; sample: 421Jul 2023: 28.0%; sample: 447Aug 2023: 34.2%; sample: 448Sep 2023: 29.9%; sample: 412Oct 2023: 21.5%; sample: 409Nov 2023: 16.7%; sample: 390Dec 2023: 43.9%; sample: 394Jan 2024: 21.1%; sample: 3792024Feb 2024: 38.5%; sample: 403Mar 2024: 30.1%; sample: 428Apr 2024: 20.2%; sample: 485May 2024: 35.2%; sample: 511Jun 2024: 33.7%; sample: 484Jul 2024: 33.4%; sample: 527Aug 2024: 47.0%; sample: 525Sep 2024: 45.1%; sample: 505Oct 2024: 22.6%; sample: 504Nov 2024: 31.8%; sample: 468Dec 2024: 51.0%; sample: 482Jan 2025: 31.8%; sample: 4212025Feb 2025: 16.3%; sample: 405Mar 2025: 19.3%; sample: 472Apr 2025: 18.0%; sample: 451May 2025: 24.4%; sample: 471Jun 2025: 23.5%; sample: 459Jul 2025: 28.7%; sample: 488Aug 2025: 23.3%; sample: 480Sep 2025: 23.9%; sample: 468Oct 2025: 18.4%; sample: 472Nov 2025: 14.7%; sample: 442Dec 2025: 33.1%; sample: 510Jan 2026: 32.4%; sample: 4512026Feb 2026: 32.6%; sample: 432Mar 2026: 20.5%; sample: 512Apr 2026: 9.9%; sample: 527May 2026: 26.4%; sample: 546Jun 2026: 42.3%; sample: 563Pandemic regime Jun 2020Summer 2022 breakdown Jul 2022NATS system failure Aug 2023Heathrow fire closure Mar 2025100%0%
Every monthly observation
MonthDisruption on arrivals
Jan 201819.2% of 308 movements
Feb 201831.3% of 326 movements
Mar 201825.4% of 389 movements
Apr 201827.6% of 464 movements
May 201822.7% of 436 movements
Jun 201822.1% of 420 movements
Jul 201823.9% of 452 movements
Aug 201819.6% of 494 movements
Sep 201811.0% of 391 movements
Oct 201814.9% of 363 movements
Nov 201822.3% of 332 movements
Dec 201825.7% of 374 movements
Jan 201918.9% of 317 movements
Feb 201921.1% of 323 movements
Mar 201917.2% of 367 movements
Apr 201911.6% of 370 movements
May 201916.1% of 436 movements
Jun 201921.3% of 507 movements
Jul 201924.7% of 558 movements
Aug 201927.9% of 594 movements
Sep 201926.7% of 517 movements
Oct 201916.3% of 472 movements
Nov 201910.3% of 448 movements
Dec 201921.4% of 434 movements
Jan 202022.0% of 423 movements
Feb 202021.6% of 412 movements
Mar 202021.6% of 222 movements
Apr 202021.2% of 33 movements — small sample, not ranked
May 20204.8% of 21 movements — small sample, not ranked
Jun 202020.0% of 25 movements — small sample, not ranked
Jul 202012.9% of 31 movements — small sample, not ranked
Aug 202019.6% of 56 movements
Sep 202020.3% of 59 movements
Oct 20203.1% of 64 movements
Nov 20202.6% of 39 movements — small sample, not ranked
Dec 202012.5% of 48 movements — small sample, not ranked
Jan 202110.0% of 30 movements — small sample, not ranked
Feb 2021suppressed: fewer than twenty movements
Mar 2021suppressed: fewer than twenty movements
Apr 20214.5% of 22 movements — small sample, not ranked
May 202110.9% of 46 movements — small sample, not ranked
Jun 202114.1% of 85 movements
Jul 202114.9% of 281 movements
Aug 202112.7% of 306 movements
Sep 202111.2% of 320 movements
Oct 202116.3% of 349 movements
Nov 20218.1% of 309 movements
Dec 202116.0% of 318 movements
Jan 202212.2% of 303 movements
Feb 202224.0% of 267 movements
Mar 202210.0% of 311 movements
Apr 202216.3% of 387 movements
May 202212.1% of 420 movements
Jun 202217.7% of 419 movements
Jul 202222.0% of 437 movements
Aug 202226.9% of 438 movements
Sep 202223.9% of 415 movements
Oct 202219.2% of 426 movements
Nov 202214.3% of 398 movements
Dec 202232.0% of 384 movements
Jan 202318.0% of 378 movements
Feb 202316.6% of 361 movements
Mar 202321.8% of 409 movements
Apr 202316.0% of 405 movements
May 202317.2% of 419 movements
Jun 202326.8% of 421 movements
Jul 202328.0% of 447 movements
Aug 202334.2% of 448 movements
Sep 202329.9% of 412 movements
Oct 202321.5% of 409 movements
Nov 202316.7% of 390 movements
Dec 202343.9% of 394 movements
Jan 202421.1% of 379 movements
Feb 202438.5% of 403 movements
Mar 202430.1% of 428 movements
Apr 202420.2% of 485 movements
May 202435.2% of 511 movements
Jun 202433.7% of 484 movements
Jul 202433.4% of 527 movements
Aug 202447.0% of 525 movements
Sep 202445.1% of 505 movements
Oct 202422.6% of 504 movements
Nov 202431.8% of 468 movements
Dec 202451.0% of 482 movements
Jan 202531.8% of 421 movements
Feb 202516.3% of 405 movements
Mar 202519.3% of 472 movements
Apr 202518.0% of 451 movements
May 202524.4% of 471 movements
Jun 202523.5% of 459 movements
Jul 202528.7% of 488 movements
Aug 202523.3% of 480 movements
Sep 202523.9% of 468 movements
Oct 202518.4% of 472 movements
Nov 202514.7% of 442 movements
Dec 202533.1% of 510 movements
Jan 202632.4% of 451 movements
Feb 202632.6% of 432 movements
Mar 202620.5% of 512 movements
Apr 20269.9% of 527 movements
May 202626.4% of 546 movements
Jun 202642.3% of 563 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 2020Arrivals20.0% of 25 movements — small sample, not ranked20.0% across 4,641 flightsreturned the next month
Pandemic regime · Jun 2020Departures64.0% of 25 movements — small sample, not ranked26.0% across 4,652 flightsreturned after 4 months
Summer 2022 breakdown · Jul 2022Arrivals22.0% of 437 movements14.3% across 3,990 flightsstill above it 8 months later
Summer 2022 breakdown · Jul 2022Departures35.2% of 438 movements20.5% across 3,999 flightsreturned after 4 months
NATS system failure · Aug 2023Arrivals34.2% of 448 movements21.7% across 4,901 flightsreturned after 2 months
NATS system failure · Aug 2023Departures47.2% of 447 movements29.1% across 4,917 flightsreturned after 2 months
Heathrow fire closure · Mar 2025Arrivals19.3% of 472 movements33.2% across 5,745 flightsreturned the next month
Heathrow fire closure · Mar 2025Departures21.6% of 473 movements41.2% across 5,782 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: Dec, 32.6% across 6 months. Lowest median: Nov, 15.7% across 6 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 nJanFebMarAprMayJunJulAugSepOctNovDec201918.9% of 317 movements21.1% of 323 movements17.2% of 367 movements11.6% of 370 movements16.1% of 436 movements21.3% of 507 movements24.7% of 558 movements27.9% of 594 movements26.7% of 517 movements16.3% of 472 movements10.3% of 448 movements21.4% of 434 movements202022.0% of 423 movements21.6% of 412 movements21.6% of 222 movements21.2% of 33 movements †4.8% of 21 movements †20.0% of 25 movements †12.9% of 31 movements †19.6% of 56 movements20.3% of 59 movements3.1% of 64 movements2.6% of 39 movements †12.5% of 48 movements †202110.0% of 30 movements †suppressed: fewer than twenty movementssuppressed: fewer than twenty movements4.5% of 22 movements †10.9% of 46 movements †14.1% of 85 movements14.9% of 281 movements12.7% of 306 movements11.2% of 320 movements16.3% of 349 movements8.1% of 309 movements16.0% of 318 movements202212.2% of 303 movements24.0% of 267 movements10.0% of 311 movements16.3% of 387 movements12.1% of 420 movements17.7% of 419 movements22.0% of 437 movements26.9% of 438 movements23.9% of 415 movements19.2% of 426 movements14.3% of 398 movements32.0% of 384 movements202318.0% of 378 movements16.6% of 361 movements21.8% of 409 movements16.0% of 405 movements17.2% of 419 movements26.8% of 421 movements28.0% of 447 movements34.2% of 448 movements29.9% of 412 movements21.5% of 409 movements16.7% of 390 movements43.9% of 394 movements202421.1% of 379 movements38.5% of 403 movements30.1% of 428 movements20.2% of 485 movements35.2% of 511 movements33.7% of 484 movements33.4% of 527 movements47.0% of 525 movements45.1% of 505 movements22.6% of 504 movements31.8% of 468 movements51.0% of 482 movements202531.8% of 421 movements16.3% of 405 movements19.3% of 472 movements18.0% of 451 movements24.4% of 471 movements23.5% of 459 movements28.7% of 488 movements23.3% of 480 movements23.9% of 468 movements18.4% of 472 movements14.7% of 442 movements33.1% of 510 movements202632.4% of 451 movements32.6% of 432 movements20.5% of 512 movements9.9% of 527 movements26.4% of 546 movements42.3% of 563 movementsno datano datano datano datano datano data
Month-by-month table: median, observed range and sample
MonthMedianObserved rangeSample
Jan19.2%12.2–32.4%7 months, 2,557 flights
Feb24.0%16.3–38.5%7 months, 2,517 flights
Mar20.5%10.0–30.1%7 months, 2,888 flights
Apr16.3%9.9–27.6%7 months, 3,089 flights
May22.7%12.1–35.2%7 months, 3,239 flights
Jun23.5%17.7–42.3%7 months, 3,273 flights
Jul26.3%22.0–33.4%6 months, 2,909 flights
Aug27.4%19.6–47.0%6 months, 2,979 flights
Sep25.3%11.0–45.1%6 months, 2,708 flights
Oct18.8%14.9–22.6%6 months, 2,646 flights
Nov15.7%10.3–31.8%6 months, 2,478 flights
Dec32.6%21.4–51.0%6 months, 2,578 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: BHX ↔ GUERNSEY, 16.5% of 328 movements. Highest disruption: EXT ↔ GUERNSEY, 44.2% of 231 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 optionBhx ↔ Guernsey16.5% of 328 flightsLcy ↔ Guernsey20.4% of 506 flightsMan ↔ Guernsey21.5% of 615 flightsBrs ↔ Guernsey30.0% of 343 flightsSou ↔ Alderney36.3% of 443 flightsExt ↔ Guernsey44.2% of 231 flights
All route comparisons and sample flags
RouteDisruptionCancellationsSample flag
BHX ↔ GUERNSEY16.5% of 328 movements2.1% of 328 movementsdescriptive comparison
London City ↔ Guernsey20.4% of 506 movements6.1% of 506 movementsdescriptive comparison
Manchester ↔ Guernsey21.5% of 615 movements2.8% of 615 movementsdescriptive comparison
Southampton ↔ Guernsey22.8% of 705 movements6.5% of 705 movementsdescriptive comparison
Jersey ↔ Guernsey23.5% of 446 movements2.7% of 446 movementsdescriptive comparison
Gatwick ↔ Guernsey26.0% of 2,169 movements2.4% of 2,169 movementsdescriptive comparison
BRS ↔ GUERNSEY30.0% of 343 movements5.2% of 343 movementsdescriptive comparison
Southampton ↔ Alderney36.3% of 443 movements17.2% of 443 movementsdescriptive comparison
EXT ↔ GUERNSEY44.2% of 231 movements5.2% of 231 movementsdescriptive comparison
EDI ↔ GUERNSEY26.7% of 45 movements — small sample, not ranked8.9% of 45 movements — small sample, not rankedsmall sample; not ranked
LBA ↔ GUERNSEY11.1% of 36 movements — small sample, not ranked2.8% of 36 movements — small sample, not rankedsmall sample; not ranked
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?

10 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
Birmingham16.5% of 328 movementsdescriptive comparison
Bristol30.0% of 343 movementsdescriptive comparison
Edinburgh26.7% of 45 movements — small sample, not rankedsmall sample; not ranked
Exeter44.0% of 232 movementsdescriptive comparison
Jersey24.3% of 457 movementsdescriptive comparison
Leeds Bradford11.1% of 36 movements — small sample, not rankedsmall sample; not ranked
London City20.4% of 506 movementsdescriptive comparison
Gatwick26.0% of 2,169 movementsdescriptive comparison
Manchester21.5% of 615 movementsdescriptive comparison
Southampton28.1% of 1,152 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

25.6% of 5,891 movements arrivals were disrupted, against 31.5% of 5,910 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

1.0% of 5,891 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

Aurigny Air Services appears from Jan 2018 to Jun 2026 with 37,388 arrivals.

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

Archive route pairs: 92.

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?

25.6% of 5,891 movements over July 2025 to June 2026.

How often are they cancelled?

4.7% of 5,891 movements at short notice.

How late is late?

32.0–71.9 minutes; delayed denominator 1,234–2,600

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.