UK FLIGHT DELAY INDEX

derived from CAA punctuality statistics for UK reporting airports

How often are these flights late or cancelled?

BA Euroflyer Ltd Dba British Airways

In the twelve months from July 2025 to June 2026, 31.9% of 13,993 movements arriving into the UK were disrupted — more than fifteen minutes late or cancelled at short notice.

Put the other way round, 68.1% of 13,993 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

31.9% of 13,993 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
31.9% of 13,993 movements0.1% of 13,993 movements37.1–65.4 minutes; delayed denominator 4,458–7,4851.1% of 13,993 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?

1.1% of 13,993 movements passed the three-hour mark.

The ladder shows how many movements crossed each threshold. Cancellations are separate: 0.1% of 13,993 movements.

DelayShare and sampleOne event per movements
More than 15 minutes31.9% of 13,993 movements3.1
More than 30 minutes20.2% of 13,993 movements5.0
More than 60 minutes9.3% of 13,993 movements10.7
More than 120 minutes2.8% of 13,993 movements35.9
More than 180 minutes1.1% of 13,993 movements89.1
More than 360 minutes0.2% of 13,993 movements538.2
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?

2.8% of 13,993 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 early2,61218.7%15–1 early3,88427.8%0–15 late3,02721.6%16–301,63511.7%31–601,52110.9%61…1209126.5%121…1802331.7%181…3601310.9%>360260.2%D=13,993
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: Nov 2025, 13.1% of 875 movements. Worst month: Jul 2023, 69.1% of 868 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: no data×2018Feb 2018: no data×Mar 2018: no data×Apr 2018: no data×May 2018: no data×Jun 2018: no data×Jul 2018: no data×Aug 2018: no data×Sep 2018: no data×Oct 2018: no data×Nov 2018: no data×Dec 2018: no data×Jan 2019: no data×2019Feb 2019: no data×Mar 2019: no data×Apr 2019: no data×May 2019: no data×Jun 2019: no data×Jul 2019: no data×Aug 2019: no data×Sep 2019: no data×Oct 2019: no data×Nov 2019: no data×Dec 2019: no data×Jan 2020: no data×2020Feb 2020: no data×Mar 2020: no data×Apr 2020: no data×May 2020: no data×Jun 2020: no data×Jul 2020: no data×Aug 2020: no data×Sep 2020: no data×Oct 2020: no data×Nov 2020: no data×Dec 2020: no data×Jan 2021: no data×2021Feb 2021: no data×Mar 2021: no data×Apr 2021: no data×May 2021: no data×Jun 2021: no data×Jul 2021: no data×Aug 2021: no data×Sep 2021: no data×Oct 2021: no data×Nov 2021: no data×Dec 2021: no data×Jan 2022: no data×2022Feb 2022: no data×Mar 2022: no data×Apr 2022: no data×May 2022: no data×Jun 2022: no data×Jul 2022: no data×Aug 2022: no data×Sep 2022: no data×Oct 2022: no data×Nov 2022: no data×Dec 2022: no data×Jan 2023: 25.0%; sample: 202023Feb 2023: no data×Mar 2023: 45.2%; sample: 416Apr 2023: 40.8%; sample: 617May 2023: 48.6%; sample: 661Jun 2023: 62.4%; sample: 1027Jul 2023: 69.1%; sample: 868Aug 2023: 64.4%; sample: 1071Sep 2023: 63.9%; sample: 1073Oct 2023: 45.8%; sample: 910Nov 2023: 27.3%; sample: 710Dec 2023: 43.4%; sample: 762Jan 2024: 25.3%; sample: 7762024Feb 2024: 26.1%; sample: 856Mar 2024: 29.6%; sample: 923Apr 2024: 18.7%; sample: 981May 2024: 28.9%; sample: 1109Jun 2024: 48.6%; sample: 1145Jul 2024: 59.7%; sample: 1168Aug 2024: 50.1%; sample: 1164Sep 2024: 64.5%; sample: 1179Oct 2024: 37.8%; sample: 1173Nov 2024: 23.0%; sample: 813Dec 2024: 37.0%; sample: 890Jan 2025: 28.2%; sample: 8762025Feb 2025: 27.3%; sample: 913Mar 2025: 26.8%; sample: 1058Apr 2025: 22.6%; sample: 1106May 2025: 28.0%; sample: 1327Jun 2025: 43.0%; sample: 1273Jul 2025: 52.5%; sample: 1411Aug 2025: 41.3%; sample: 1420Sep 2025: 47.3%; sample: 1373Oct 2025: 27.5%; sample: 1249Nov 2025: 13.1%; sample: 875Dec 2025: 22.9%; sample: 933Jan 2026: 25.4%; sample: 9462026Feb 2026: 22.0%; sample: 936Mar 2026: 24.5%; sample: 1104Apr 2026: 19.9%; sample: 1099May 2026: 23.8%; sample: 1295Jun 2026: 42.6%; sample: 1352Pandemic regime Jun 2020Summer 2022 breakdown Jul 2022NATS system failure Aug 2023Heathrow fire closure Mar 2025100%0%
Every monthly observation
MonthDisruption on arrivals
Jan 2018no data
Feb 2018no data
Mar 2018no data
Apr 2018no data
May 2018no data
Jun 2018no data
Jul 2018no data
Aug 2018no data
Sep 2018no data
Oct 2018no data
Nov 2018no data
Dec 2018no data
Jan 2019no data
Feb 2019no data
Mar 2019no data
Apr 2019no data
May 2019no data
Jun 2019no data
Jul 2019no data
Aug 2019no data
Sep 2019no data
Oct 2019no data
Nov 2019no data
Dec 2019no data
Jan 2020no data
Feb 2020no data
Mar 2020no data
Apr 2020no data
May 2020no data
Jun 2020no data
Jul 2020no data
Aug 2020no data
Sep 2020no data
Oct 2020no data
Nov 2020no data
Dec 2020no data
Jan 2021no data
Feb 2021no data
Mar 2021no data
Apr 2021no data
May 2021no data
Jun 2021no data
Jul 2021no data
Aug 2021no data
Sep 2021no data
Oct 2021no data
Nov 2021no data
Dec 2021no data
Jan 2022no data
Feb 2022no data
Mar 2022no data
Apr 2022no data
May 2022no data
Jun 2022no data
Jul 2022no data
Aug 2022no data
Sep 2022no data
Oct 2022no data
Nov 2022no data
Dec 2022no data
Jan 202325.0% of 20 movements — small sample, not ranked
Feb 2023no data
Mar 202345.2% of 416 movements
Apr 202340.8% of 617 movements
May 202348.6% of 661 movements
Jun 202362.4% of 1,027 movements
Jul 202369.1% of 868 movements
Aug 202364.4% of 1,071 movements
Sep 202363.9% of 1,073 movements
Oct 202345.8% of 910 movements
Nov 202327.3% of 710 movements
Dec 202343.4% of 762 movements
Jan 202425.3% of 776 movements
Feb 202426.1% of 856 movements
Mar 202429.6% of 923 movements
Apr 202418.7% of 981 movements
May 202428.9% of 1,109 movements
Jun 202448.6% of 1,145 movements
Jul 202459.7% of 1,168 movements
Aug 202450.1% of 1,164 movements
Sep 202464.5% of 1,179 movements
Oct 202437.8% of 1,173 movements
Nov 202423.0% of 813 movements
Dec 202437.0% of 890 movements
Jan 202528.2% of 876 movements
Feb 202527.3% of 913 movements
Mar 202526.8% of 1,058 movements
Apr 202522.6% of 1,106 movements
May 202528.0% of 1,327 movements
Jun 202543.0% of 1,273 movements
Jul 202552.5% of 1,411 movements
Aug 202541.3% of 1,420 movements
Sep 202547.3% of 1,373 movements
Oct 202527.5% of 1,249 movements
Nov 202513.1% of 875 movements
Dec 202522.9% of 933 movements
Jan 202625.4% of 946 movements
Feb 202622.0% of 936 movements
Mar 202624.5% of 1,104 movements
Apr 202619.9% of 1,099 movements
May 202623.8% of 1,295 movements
Jun 202642.6% of 1,352 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 datano complete baselinenot enough data: needs a complete baseline and a publishable event month
Pandemic regime · Jun 2020Departuresno datano complete baselinenot enough data: needs a complete baseline and a publishable event month
Summer 2022 breakdown · Jul 2022Arrivalsno datano complete baselinenot enough data: needs a complete baseline and a publishable event month
Summer 2022 breakdown · Jul 2022Departuresno datano complete baselinenot enough data: needs a complete baseline and a publishable event month
NATS system failure · Aug 2023Arrivals64.4% of 1,071 movementsno complete baselinenot enough data: needs a complete baseline and a publishable event month
NATS system failure · Aug 2023Departures64.2% of 1,074 movementsno complete baselinenot enough data: needs a complete baseline and a publishable event month
Heathrow fire closure · Mar 2025Arrivals26.8% of 1,058 movements37.8% across 12,334 flightsreturned the next month
Heathrow fire closure · Mar 2025Departures30.1% of 1,059 movements39.5% across 12,373 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: Sep, 63.9% across 3 months. Lowest median: Apr, 21.3% across 4 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 nJanFebMarAprMayJunJulAugSepOctNovDec2019no datano datano datano datano datano datano datano datano datano datano datano data2020no datano datano datano datano datano datano datano datano datano datano datano data2021no datano datano datano datano datano datano datano datano datano datano datano data2022no datano datano datano datano datano datano datano datano datano datano datano data202325.0% of 20 movements †no data45.2% of 416 movements40.8% of 617 movements48.6% of 661 movements62.4% of 1,027 movements69.1% of 868 movements64.4% of 1,071 movements63.9% of 1,073 movements45.8% of 910 movements27.3% of 710 movements43.4% of 762 movements202425.3% of 776 movements26.1% of 856 movements29.6% of 923 movements18.7% of 981 movements28.9% of 1,109 movements48.6% of 1,145 movements59.7% of 1,168 movements50.1% of 1,164 movements64.5% of 1,179 movements37.8% of 1,173 movements23.0% of 813 movements37.0% of 890 movements202528.2% of 876 movements27.3% of 913 movements26.8% of 1,058 movements22.6% of 1,106 movements28.0% of 1,327 movements43.0% of 1,273 movements52.5% of 1,411 movements41.3% of 1,420 movements47.3% of 1,373 movements27.5% of 1,249 movements13.1% of 875 movements22.9% of 933 movements202625.4% of 946 movements22.0% of 936 movements24.5% of 1,104 movements19.9% of 1,099 movements23.8% of 1,295 movements42.6% of 1,352 movementsno datano datano datano datano datano data
Month-by-month table: median, observed range and sample
MonthMedianObserved rangeSample
Jan25.3%25.0–28.2%4 months, 2,618 flights
Feb26.1%22.0–27.3%3 months, 2,705 flights
Mar28.2%24.5–45.2%4 months, 3,501 flights
Apr21.3%18.7–40.8%4 months, 3,803 flights
May28.5%23.8–48.6%4 months, 4,392 flights
Jun45.8%42.6–62.4%4 months, 4,797 flights
Jul59.7%52.5–69.1%3 months, 3,447 flights
Aug50.1%41.3–64.4%3 months, 3,655 flights
Sep63.9%47.3–64.5%3 months, 3,625 flights
Oct37.8%27.5–45.8%3 months, 3,332 flights
Nov23.0%13.1–27.3%3 months, 2,398 flights
Dec37.0%22.9–43.4%3 months, 2,585 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: LGW ↔ GRAZ, 9.8% of 92 movements. Highest disruption: LGW ↔ NICE, 55.0% of 298 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 optionLgw ↔ Graz9.8% of 92 flightsLgw ↔ Jersey12.2% of 674 flightsLgw ↔ Fuerteventura13.3% of 60 flightsLgw ↔ Kos48.2% of 164 flightsLgw ↔ Mahon50.0% of 150 flightsLgw ↔ Nice55.0% of 298 flights
All route comparisons and sample flags
RouteDisruptionCancellationsSample flag
LGW ↔ GRAZ9.8% of 92 movementsno events in 92 movementsdescriptive comparison
Gatwick ↔ Jersey12.2% of 674 movements0.1% of 674 movementsdescriptive comparison
Gatwick ↔ Fuerteventura13.3% of 60 movementsno events in 60 movementsdescriptive comparison
LGW ↔ RABAT13.6% of 66 movementsno events in 66 movementsdescriptive comparison
Jersey ↔ Gatwick15.3% of 634 movements1.3% of 634 movementsdescriptive comparison
Gatwick ↔ Funchal16.5% of 405 movementsno events in 405 movementsdescriptive comparison
LGW ↔ AGADIR-AL-MASSIRA19.8% of 131 movementsno events in 131 movementsdescriptive comparison
Gatwick ↔ Marrakesh20.5% of 557 movementsno events in 557 movementsdescriptive comparison
Gatwick ↔ Salzburg21.5% of 331 movementsno events in 331 movementsdescriptive comparison
LGW ↔ GRENOBLE21.9% of 96 movementsno events in 96 movementsdescriptive comparison
Gatwick ↔ Lyon23.0% of 61 movementsno events in 61 movementsdescriptive comparison
Gatwick ↔ Sharm El Sheikh (Ophira)23.3% of 90 movementsno events in 90 movementsdescriptive comparison
Gatwick ↔ Faro24.5% of 681 movementsno events in 681 movementsdescriptive comparison
Gatwick ↔ Bordeaux25.5% of 376 movementsno events in 376 movementsdescriptive comparison
Gatwick ↔ Antalya25.6% of 164 movementsno events in 164 movementsdescriptive comparison
Gatwick ↔ Geneva26.3% of 346 movementsno events in 346 movementsdescriptive comparison
Gatwick ↔ Tenerife (Surreina Sofia)26.3% of 494 movementsno events in 494 movementsdescriptive comparison
Gatwick ↔ Verona Villafranca28.8% of 410 movementsno events in 410 movementsdescriptive comparison
Gatwick ↔ Paphos29.2% of 219 movementsno events in 219 movementsdescriptive comparison
LGW ↔ INNSBRUCK29.4% of 163 movementsno events in 163 movementsdescriptive comparison
Gatwick ↔ Larnaca30.1% of 302 movementsno events in 302 movementsdescriptive comparison
Gatwick ↔ Salonika30.7% of 215 movementsno events in 215 movementsdescriptive comparison
LGW ↔ SALERNO-COSTA-AMALFI32.0% of 50 movementsno events in 50 movementsdescriptive comparison
LGW ↔ MONTPELLIER32.9% of 70 movementsno events in 70 movementsdescriptive comparison
Gatwick ↔ Las Palmas33.5% of 284 movementsno events in 284 movementsdescriptive comparison
LGW ↔ BARI-PALESE33.8% of 284 movementsno events in 284 movementsdescriptive comparison
Gatwick ↔ Oporto (Portugal)34.5% of 414 movementsno events in 414 movementsdescriptive comparison
Gatwick ↔ Dubrovnik34.8% of 247 movementsno events in 247 movementsdescriptive comparison
Gatwick ↔ Ibiza35.4% of 347 movementsno events in 347 movementsdescriptive comparison
Gatwick ↔ Catania (Fontanarossa)36.8% of 258 movementsno events in 258 movementsdescriptive comparison
LGW ↔ ALGIERS36.9% of 328 movementsno events in 328 movementsdescriptive comparison
Gatwick ↔ Rhodes37.7% of 191 movementsno events in 191 movementsdescriptive comparison
Gatwick ↔ Alicante37.8% of 410 movementsno events in 410 movementsdescriptive comparison
Gatwick ↔ Turin38.5% of 353 movementsno events in 353 movementsdescriptive comparison
Gatwick ↔ Malaga38.5% of 864 movementsno events in 864 movementsdescriptive comparison
Gatwick ↔ Arrecife41.4% of 350 movementsno events in 350 movementsdescriptive comparison
Gatwick ↔ Palma De Mallorca41.7% of 403 movementsno events in 403 movementsdescriptive comparison
Gatwick ↔ Corfu41.9% of 215 movements0.5% of 215 movementsdescriptive comparison
Gatwick ↔ Seville44.2% of 328 movementsno events in 328 movementsdescriptive comparison
Gatwick ↔ Dalaman45.6% of 160 movementsno events in 160 movementsdescriptive comparison
LGW ↔ CAGLIARI-ELMAS46.7% of 195 movementsno events in 195 movementsdescriptive comparison
Gatwick ↔ Malta46.8% of 566 movementsno events in 566 movementsdescriptive comparison
Gatwick ↔ Heraklion48.1% of 295 movementsno events in 295 movementsdescriptive comparison
LGW ↔ KOS48.2% of 164 movementsno events in 164 movementsdescriptive comparison
Gatwick ↔ Mahon50.0% of 150 movementsno events in 150 movementsdescriptive comparison
Gatwick ↔ Nice55.0% of 298 movementsno events in 298 movementsdescriptive comparison
LGW ↔ IVALO32.4% of 34 movements — small sample, not rankedno events in 34 movements — small sample, not rankedsmall sample; not ranked
LGW ↔ KALAMATA36.4% of 44 movements — small sample, not rankedno events in 44 movements — small sample, not rankedsmall sample; not ranked
LGW ↔ PREVEZA51.9% of 27 movements — small sample, not rankedno events in 27 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?

3 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
Jersey15.3% of 634 movementsdescriptive comparison
Gatwick32.8% of 13,321 movementsdescriptive comparison
Heathrow21.9% of 32 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.

Arrivals vs departures

31.9% of 13,993 movements arrivals were disrupted, against 32.1% of 14,022 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

1.1% of 13,993 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

BA Euroflyer Ltd Dba British Airways appears from Jan 2023 to Jun 2026 with 40,858 arrivals.

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

Archive route pairs: 112.

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?

31.9% of 13,993 movements over July 2025 to June 2026.

How often are they cancelled?

0.1% of 13,993 movements at short notice.

How late is late?

37.1–65.4 minutes; delayed denominator 4,458–7,485

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.