UK FLIGHT DELAY INDEX

derived from CAA punctuality statistics for UK reporting airports

How often are these flights late or cancelled?

Iceland

In the twelve months from July 2025 to June 2026, 18.4% of 3,621 movements arriving into the UK were disrupted — more than fifteen minutes late or cancelled at short notice.

Put the other way round, 81.6% of 3,621 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

18.4% of 3,621 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
18.4% of 3,621 movements1.4% of 3,621 movements25.2–69.8 minutes; delayed denominator 613–1,5570.9% of 3,621 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?

0.9% of 3,621 movements passed the three-hour mark.

The ladder shows how many movements crossed each threshold. Cancellations are separate: 1.4% of 3,621 movements.

DelayShare and sampleOne event per movements
More than 15 minutes16.9% of 3,621 movements5.9
More than 30 minutes9.0% of 3,621 movements11.1
More than 60 minutes4.2% of 3,621 movements23.7
More than 120 minutes1.6% of 3,621 movements62.4
More than 180 minutes0.9% of 3,621 movements113.2
More than 360 minutes0.2% of 3,621 movements402.3
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?

1.6% of 3,621 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 early66418.3%15–1 early1,34837.2%0–15 late94426.1%16–302888.0%31–601724.8%61…120952.6%121…180260.7%181…360230.6%>36090.2%D=3,621
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: Aug 2021, 4.4% of 114 movements. Worst month: Jun 2018, 50.4% of 345 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: 35.3%; sample: 5192018Feb 2018: 34.9%; sample: 502Mar 2018: 25.7%; sample: 526Apr 2018: 18.8%; sample: 416May 2018: 23.9%; sample: 376Jun 2018: 50.4%; sample: 345Jul 2018: 42.3%; sample: 359Aug 2018: 33.7%; sample: 365Sep 2018: 25.5%; sample: 369Oct 2018: 25.9%; sample: 397Nov 2018: 26.7%; sample: 460Dec 2018: 29.5%; sample: 478Jan 2019: 18.8%; sample: 4732019Feb 2019: 19.7%; sample: 462Mar 2019: 21.5%; sample: 497Apr 2019: 26.4%; sample: 242May 2019: 22.2%; sample: 239Jun 2019: 33.2%; sample: 241Jul 2019: 31.0%; sample: 242Aug 2019: 28.4%; sample: 243Sep 2019: 21.3%; sample: 239Oct 2019: 22.4%; sample: 303Nov 2019: 9.9%; sample: 364Dec 2019: 19.3%; sample: 384Jan 2020: 36.0%; sample: 3812020Feb 2020: 34.8%; sample: 385Mar 2020: 18.5%; sample: 298Apr 2020: 34.8%; sample: 23May 2020: suppressed: fewer than twenty movements×Jun 2020: suppressed: fewer than twenty movements×Jul 2020: 12.3%; sample: 65Aug 2020: 8.3%; sample: 84Sep 2020: 6.4%; sample: 47Oct 2020: 8.6%; sample: 58Nov 2020: suppressed: fewer than twenty movements×Dec 2020: 17.4%; sample: 23Jan 2021: suppressed: fewer than twenty movements×2021Feb 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: 6.2%; sample: 65Jul 2021: 12.0%; sample: 83Aug 2021: 4.4%; sample: 114Sep 2021: 6.0%; sample: 149Oct 2021: 9.1%; sample: 176Nov 2021: 9.0%; sample: 211Dec 2021: 13.3%; sample: 240Jan 2022: 23.2%; sample: 2072022Feb 2022: 34.5%; sample: 275Mar 2022: 22.0%; sample: 282Apr 2022: 14.0%; sample: 257May 2022: 19.6%; sample: 235Jun 2022: 37.7%; sample: 231Jul 2022: 37.9%; sample: 240Aug 2022: 33.2%; sample: 232Sep 2022: 29.5%; sample: 237Oct 2022: 25.0%; sample: 320Nov 2022: 12.0%; sample: 374Dec 2022: 42.0%; sample: 371Jan 2023: 23.8%; sample: 3822023Feb 2023: 24.6%; sample: 410Mar 2023: 14.2%; sample: 408Apr 2023: 14.9%; sample: 288May 2023: 18.2%; sample: 253Jun 2023: 33.1%; sample: 251Jul 2023: 31.5%; sample: 248Aug 2023: 21.8%; sample: 243Sep 2023: 24.5%; sample: 261Oct 2023: 22.4%; sample: 348Nov 2023: 11.1%; sample: 488Dec 2023: 37.2%; sample: 478Jan 2024: 19.5%; sample: 4362024Feb 2024: 20.9%; sample: 484Mar 2024: 11.7%; sample: 471Apr 2024: 12.3%; sample: 277May 2024: 19.6%; sample: 245Jun 2024: 14.4%; sample: 236Jul 2024: 26.2%; sample: 237Aug 2024: 21.6%; sample: 232Sep 2024: 18.4%; sample: 239Oct 2024: 17.4%; sample: 316Nov 2024: 14.7%; sample: 422Dec 2024: 35.2%; sample: 415Jan 2025: 27.7%; sample: 3972025Feb 2025: 20.8%; sample: 419Mar 2025: 11.0%; sample: 426Apr 2025: 7.0%; sample: 302May 2025: 17.3%; sample: 249Jun 2025: 9.5%; sample: 231Jul 2025: 19.2%; sample: 229Aug 2025: 17.4%; sample: 236Sep 2025: 15.5%; sample: 233Oct 2025: 24.2%; sample: 310Nov 2025: 12.3%; sample: 389Dec 2025: 26.7%; sample: 371Jan 2026: 17.4%; sample: 3502026Feb 2026: 12.9%; sample: 372Mar 2026: 24.1%; sample: 402Apr 2026: 16.5%; sample: 273May 2026: 11.9%; sample: 227Jun 2026: 19.2%; sample: 229Pandemic regime Jun 2020Summer 2022 breakdown Jul 2022NATS system failure Aug 2023Heathrow fire closure Mar 2025100%0%
Every monthly observation
MonthDisruption on arrivals
Jan 201835.3% of 519 movements
Feb 201834.9% of 502 movements
Mar 201825.7% of 526 movements
Apr 201818.8% of 416 movements
May 201823.9% of 376 movements
Jun 201850.4% of 345 movements
Jul 201842.3% of 359 movements
Aug 201833.7% of 365 movements
Sep 201825.5% of 369 movements
Oct 201825.9% of 397 movements
Nov 201826.7% of 460 movements
Dec 201829.5% of 478 movements
Jan 201918.8% of 473 movements
Feb 201919.7% of 462 movements
Mar 201921.5% of 497 movements
Apr 201926.4% of 242 movements
May 201922.2% of 239 movements
Jun 201933.2% of 241 movements
Jul 201931.0% of 242 movements
Aug 201928.4% of 243 movements
Sep 201921.3% of 239 movements
Oct 201922.4% of 303 movements
Nov 20199.9% of 364 movements
Dec 201919.3% of 384 movements
Jan 202036.0% of 381 movements
Feb 202034.8% of 385 movements
Mar 202018.5% of 298 movements
Apr 202034.8% of 23 movements — small sample, not ranked
May 2020suppressed: fewer than twenty movements
Jun 2020suppressed: fewer than twenty movements
Jul 202012.3% of 65 movements
Aug 20208.3% of 84 movements
Sep 20206.4% of 47 movements — small sample, not ranked
Oct 20208.6% of 58 movements
Nov 2020suppressed: fewer than twenty movements
Dec 202017.4% of 23 movements — small sample, not ranked
Jan 2021suppressed: fewer than twenty 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 20216.2% of 65 movements
Jul 202112.0% of 83 movements
Aug 20214.4% of 114 movements
Sep 20216.0% of 149 movements
Oct 20219.1% of 176 movements
Nov 20219.0% of 211 movements
Dec 202113.3% of 240 movements
Jan 202223.2% of 207 movements
Feb 202234.5% of 275 movements
Mar 202222.0% of 282 movements
Apr 202214.0% of 257 movements
May 202219.6% of 235 movements
Jun 202237.7% of 231 movements
Jul 202237.9% of 240 movements
Aug 202233.2% of 232 movements
Sep 202229.5% of 237 movements
Oct 202225.0% of 320 movements
Nov 202212.0% of 374 movements
Dec 202242.0% of 371 movements
Jan 202323.8% of 382 movements
Feb 202324.6% of 410 movements
Mar 202314.2% of 408 movements
Apr 202314.9% of 288 movements
May 202318.2% of 253 movements
Jun 202333.1% of 251 movements
Jul 202331.5% of 248 movements
Aug 202321.8% of 243 movements
Sep 202324.5% of 261 movements
Oct 202322.4% of 348 movements
Nov 202311.1% of 488 movements
Dec 202337.2% of 478 movements
Jan 202419.5% of 436 movements
Feb 202420.9% of 484 movements
Mar 202411.7% of 471 movements
Apr 202412.3% of 277 movements
May 202419.6% of 245 movements
Jun 202414.4% of 236 movements
Jul 202426.2% of 237 movements
Aug 202421.6% of 232 movements
Sep 202418.4% of 239 movements
Oct 202417.4% of 316 movements
Nov 202414.7% of 422 movements
Dec 202435.2% of 415 movements
Jan 202527.7% of 397 movements
Feb 202520.8% of 419 movements
Mar 202511.0% of 426 movements
Apr 20257.0% of 302 movements
May 202517.3% of 249 movements
Jun 20259.5% of 231 movements
Jul 202519.2% of 229 movements
Aug 202517.4% of 236 movements
Sep 202515.5% of 233 movements
Oct 202524.2% of 310 movements
Nov 202512.3% of 389 movements
Dec 202526.7% of 371 movements
Jan 202617.4% of 350 movements
Feb 202612.9% of 372 movements
Mar 202624.1% of 402 movements
Apr 202616.5% of 273 movements
May 202611.9% of 227 movements
Jun 202619.2% of 229 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 2020Arrivalssuppressed: fewer than twenty movementsno complete baselinenot enough data: needs a complete baseline and a publishable event month
Pandemic regime · Jun 2020Departuressuppressed: fewer than twenty movementsno complete baselinenot enough data: needs a complete baseline and a publishable event month
Summer 2022 breakdown · Jul 2022Arrivals37.9% of 240 movements17.1% across 2,460 flightsreturned after 4 months
Summer 2022 breakdown · Jul 2022Departures51.5% of 239 movements16.9% across 2,455 flightsreturned after 4 months
NATS system failure · Aug 2023Arrivals21.8% of 243 movements25.2% across 3,774 flightsreturned the next month
NATS system failure · Aug 2023Departures32.4% of 244 movements27.1% across 3,774 flightsreturned the next month
Heathrow fire closure · Mar 2025Arrivals11.0% of 426 movements20.0% across 3,906 flightsreturned the next month
Heathrow fire closure · Mar 2025Departures12.0% of 424 movements20.5% across 3,912 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: Jun, 33.1% across 7 months. Lowest median: Nov, 12.2% 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 nJanFebMarAprMayJunJulAugSepOctNovDec201918.8% of 473 movements19.7% of 462 movements21.5% of 497 movements26.4% of 242 movements22.2% of 239 movements33.2% of 241 movements31.0% of 242 movements28.4% of 243 movements21.3% of 239 movements22.4% of 303 movements9.9% of 364 movements19.3% of 384 movements202036.0% of 381 movements34.8% of 385 movements18.5% of 298 movements34.8% of 23 movements †suppressed: fewer than twenty movementssuppressed: fewer than twenty movements12.3% of 65 movements8.3% of 84 movements6.4% of 47 movements †8.6% of 58 movementssuppressed: fewer than twenty movements17.4% of 23 movements †2021suppressed: fewer than twenty movementssuppressed: fewer than twenty movementssuppressed: fewer than twenty movementssuppressed: fewer than twenty movementssuppressed: fewer than twenty movements6.2% of 65 movements12.0% of 83 movements4.4% of 114 movements6.0% of 149 movements9.1% of 176 movements9.0% of 211 movements13.3% of 240 movements202223.2% of 207 movements34.5% of 275 movements22.0% of 282 movements14.0% of 257 movements19.6% of 235 movements37.7% of 231 movements37.9% of 240 movements33.2% of 232 movements29.5% of 237 movements25.0% of 320 movements12.0% of 374 movements42.0% of 371 movements202323.8% of 382 movements24.6% of 410 movements14.2% of 408 movements14.9% of 288 movements18.2% of 253 movements33.1% of 251 movements31.5% of 248 movements21.8% of 243 movements24.5% of 261 movements22.4% of 348 movements11.1% of 488 movements37.2% of 478 movements202419.5% of 436 movements20.9% of 484 movements11.7% of 471 movements12.3% of 277 movements19.6% of 245 movements14.4% of 236 movements26.2% of 237 movements21.6% of 232 movements18.4% of 239 movements17.4% of 316 movements14.7% of 422 movements35.2% of 415 movements202527.7% of 397 movements20.8% of 419 movements11.0% of 426 movements7.0% of 302 movements17.3% of 249 movements9.5% of 231 movements19.2% of 229 movements17.4% of 236 movements15.5% of 233 movements24.2% of 310 movements12.3% of 389 movements26.7% of 371 movements202617.4% of 350 movements12.9% of 372 movements24.1% of 402 movements16.5% of 273 movements11.9% of 227 movements19.2% of 229 movementsno datano datano datano datano datano data
Month-by-month table: median, observed range and sample
MonthMedianObserved rangeSample
Jan23.2%17.4–35.3%7 months, 2,764 flights
Feb20.9%12.9–34.9%7 months, 2,924 flights
Mar21.5%11.0–25.7%7 months, 3,012 flights
Apr14.9%7.0–26.4%7 months, 2,055 flights
May19.6%11.9–23.9%7 months, 1,824 flights
Jun33.1%9.5–50.4%7 months, 1,764 flights
Jul31.2%19.2–42.3%6 months, 1,555 flights
Aug25.1%17.4–33.7%6 months, 1,551 flights
Sep22.9%15.5–29.5%6 months, 1,578 flights
Oct23.3%17.4–25.9%6 months, 1,994 flights
Nov12.2%9.9–26.7%6 months, 2,497 flights
Dec32.3%19.3–42.0%6 months, 2,497 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 ↔ KEFLAVIK, 13.8% of 87 movements. Highest disruption: STN ↔ KEFLAVIK, 25.3% of 95 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 ↔ Keflavik13.8% of 87 flightsLhr ↔ Keflavik14.6% of 1,106 flightsLgw ↔ Keflavik18.0% of 618 flightsMan ↔ Keflavik22.5% of 617 flightsLgw ↔ Akureyri23.7% of 59 flightsStn ↔ Keflavik25.3% of 95 flights
All route comparisons and sample flags
RouteDisruptionCancellationsSample flag
BHX ↔ KEFLAVIK13.8% of 87 movementsno events in 87 movementsdescriptive comparison
Heathrow ↔ Keflavik14.6% of 1,106 movements0.9% of 1,106 movementsdescriptive comparison
Gatwick ↔ Keflavik18.0% of 618 movements1.8% of 618 movementsdescriptive comparison
EDI ↔ KEFLAVIK18.0% of 283 movements1.1% of 283 movementsdescriptive comparison
GLA ↔ KEFLAVIK18.3% of 360 movements1.9% of 360 movementsdescriptive comparison
BRS ↔ KEFLAVIK18.5% of 65 movementsno events in 65 movementsdescriptive comparison
LTN ↔ KEFLAVIK22.0% of 246 movements1.2% of 246 movementsdescriptive comparison
Manchester ↔ Keflavik22.5% of 617 movements0.8% of 617 movementsdescriptive comparison
LGW ↔ AKUREYRI23.7% of 59 movementsno events in 59 movementsdescriptive comparison
STN ↔ KEFLAVIK25.3% of 95 movements13.7% of 95 movementsdescriptive comparison
MAN ↔ AKUREYRI33.3% of 39 movements — small sample, not rankedno events in 39 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?

9 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
Birmingham13.8% of 87 movementsdescriptive comparison
Bristol18.5% of 65 movementsdescriptive comparison
Edinburgh18.0% of 284 movementsdescriptive comparison
Glasgow18.3% of 360 movementsdescriptive comparison
Gatwick18.5% of 677 movementsdescriptive comparison
Heathrow14.6% of 1,106 movementsdescriptive comparison
Luton22.0% of 246 movementsdescriptive comparison
Manchester23.2% of 656 movementsdescriptive comparison
Stansted25.3% of 95 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

18.4% of 3,621 movements arrivals were disrupted, against 19.2% of 3,627 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

0.9% of 3,621 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

Iceland appears from Jan 2018 to Jun 2026 with 28,506 arrivals.

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

Archive route pairs: 48.

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?

18.4% of 3,621 movements over July 2025 to June 2026.

How often are they cancelled?

1.4% of 3,621 movements at short notice.

How late is late?

25.2–69.8 minutes; delayed denominator 613–1,557

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.