How often are these flights late or cancelled?
Irish Republic
In the twelve months from July 2025 to June 2026, 23.6% of 53,811 movements arriving into the UK were disrupted — more than fifteen minutes late or cancelled at short notice.
Put the other way round, 76.4% of 53,811 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
23.6% of 53,811 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.
| Disruption | Short-notice cancellations | Delay among delayed movements | Over three hours |
|---|---|---|---|
| 23.6% of 53,811 movements | 0.8% of 53,811 movements | 25.3–57.4 minutes; delayed denominator 12,238–25,654 | 0.4% of 53,811 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?
0.4% of 53,811 movements passed the three-hour mark.
The ladder shows how many movements crossed each threshold. Cancellations are separate: 0.8% of 53,811 movements.
| Delay | Share and sample | One event per movements |
|---|---|---|
| More than 15 minutes | 22.7% of 53,811 movements | 4.4 |
| More than 30 minutes | 12.7% of 53,811 movements | 7.8 |
| More than 60 minutes | 5.2% of 53,811 movements | 19.2 |
| More than 120 minutes | 1.3% of 53,811 movements | 79.0 |
| More than 180 minutes | 0.4% of 53,811 movements | 263.8 |
| More than 360 minutes | 0.1% of 53,811 movements | 1,793.7 |
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?
1.3% of 53,811 movements passed two hours.
The histogram shows the published delay bands. Bucket shares use all reported operations, including unmatched records; cancellations are reported separately.
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: Jul 2020, 1.7% of 956 movements. Worst month: Jun 2022, 52.6% of 3,915 movements.
The line traces every month. Lower disruption is better; gaps are never zeros. Pandemic readings describe a different operating regime.
Every monthly observation
| Month | Disruption on arrivals |
|---|---|
| Jan 2018 | 13.5% of 4,509 movements |
| Feb 2018 | 14.5% of 4,238 movements |
| Mar 2018 | 26.2% of 4,758 movements |
| Apr 2018 | 25.7% of 4,727 movements |
| May 2018 | 26.7% of 4,894 movements |
| Jun 2018 | 33.0% of 4,769 movements |
| Jul 2018 | 30.8% of 4,902 movements |
| Aug 2018 | 23.7% of 4,850 movements |
| Sep 2018 | 23.4% of 4,508 movements |
| Oct 2018 | 23.2% of 4,634 movements |
| Nov 2018 | 21.1% of 4,047 movements |
| Dec 2018 | 23.7% of 4,235 movements |
| Jan 2019 | 9.0% of 4,457 movements |
| Feb 2019 | 16.8% of 4,208 movements |
| Mar 2019 | 17.7% of 4,734 movements |
| Apr 2019 | 26.6% of 4,691 movements |
| May 2019 | 20.7% of 4,618 movements |
| Jun 2019 | 31.6% of 4,417 movements |
| Jul 2019 | 24.0% of 4,551 movements |
| Aug 2019 | 28.0% of 4,589 movements |
| Sep 2019 | 29.0% of 4,391 movements |
| Oct 2019 | 17.5% of 4,453 movements |
| Nov 2019 | 10.0% of 4,109 movements |
| Dec 2019 | 12.6% of 4,200 movements |
| Jan 2020 | 8.3% of 4,340 movements |
| Feb 2020 | 19.7% of 4,269 movements |
| Mar 2020 | 13.0% of 3,441 movements |
| Apr 2020 | 5.9% of 303 movements |
| May 2020 | 3.8% of 289 movements |
| Jun 2020 | 1.7% of 293 movements |
| Jul 2020 | 1.7% of 956 movements |
| Aug 2020 | 1.9% of 1,072 movements |
| Sep 2020 | 3.5% of 803 movements |
| Oct 2020 | 2.3% of 725 movements |
| Nov 2020 | 4.8% of 461 movements |
| Dec 2020 | 25.2% of 500 movements |
| Jan 2021 | 11.2% of 409 movements |
| Feb 2021 | 3.7% of 191 movements |
| Mar 2021 | 4.0% of 198 movements |
| Apr 2021 | 5.4% of 204 movements |
| May 2021 | 3.5% of 255 movements |
| Jun 2021 | 3.7% of 563 movements |
| Jul 2021 | 5.5% of 973 movements |
| Aug 2021 | 7.8% of 1,287 movements |
| Sep 2021 | 7.9% of 1,577 movements |
| Oct 2021 | 9.2% of 1,864 movements |
| Nov 2021 | 5.8% of 2,411 movements |
| Dec 2021 | 9.6% of 2,771 movements |
| Jan 2022 | 5.3% of 1,911 movements |
| Feb 2022 | 15.6% of 2,324 movements |
| Mar 2022 | 11.6% of 3,143 movements |
| Apr 2022 | 29.0% of 3,628 movements |
| May 2022 | 35.6% of 4,054 movements |
| Jun 2022 | 52.6% of 3,915 movements |
| Jul 2022 | 49.1% of 3,764 movements |
| Aug 2022 | 45.2% of 3,752 movements |
| Sep 2022 | 47.7% of 3,813 movements |
| Oct 2022 | 42.5% of 3,973 movements |
| Nov 2022 | 27.4% of 3,911 movements |
| Dec 2022 | 46.6% of 3,953 movements |
| Jan 2023 | 19.6% of 3,932 movements |
| Feb 2023 | 18.8% of 3,552 movements |
| Mar 2023 | 28.4% of 4,159 movements |
| Apr 2023 | 32.3% of 4,283 movements |
| May 2023 | 34.6% of 4,522 movements |
| Jun 2023 | 39.3% of 4,349 movements |
| Jul 2023 | 41.7% of 4,498 movements |
| Aug 2023 | 40.4% of 4,560 movements |
| Sep 2023 | 40.3% of 4,399 movements |
| Oct 2023 | 32.0% of 4,516 movements |
| Nov 2023 | 16.5% of 3,930 movements |
| Dec 2023 | 28.7% of 4,016 movements |
| Jan 2024 | 17.5% of 3,978 movements |
| Feb 2024 | 15.6% of 3,786 movements |
| Mar 2024 | 21.4% of 4,238 movements |
| Apr 2024 | 23.7% of 4,109 movements |
| May 2024 | 33.1% of 4,402 movements |
| Jun 2024 | 33.4% of 4,196 movements |
| Jul 2024 | 37.1% of 4,343 movements |
| Aug 2024 | 33.4% of 4,411 movements |
| Sep 2024 | 42.2% of 4,293 movements |
| Oct 2024 | 28.2% of 4,277 movements |
| Nov 2024 | 18.7% of 3,890 movements |
| Dec 2024 | 31.9% of 3,901 movements |
| Jan 2025 | 23.6% of 3,850 movements |
| Feb 2025 | 14.8% of 3,637 movements |
| Mar 2025 | 14.9% of 4,110 movements |
| Apr 2025 | 15.0% of 4,383 movements |
| May 2025 | 18.2% of 4,640 movements |
| Jun 2025 | 26.8% of 4,525 movements |
| Jul 2025 | 30.3% of 4,614 movements |
| Aug 2025 | 26.0% of 4,610 movements |
| Sep 2025 | 34.0% of 4,530 movements |
| Oct 2025 | 25.5% of 4,712 movements |
| Nov 2025 | 20.2% of 4,303 movements |
| Dec 2025 | 27.2% of 4,381 movements |
| Jan 2026 | 17.5% of 4,232 movements |
| Feb 2026 | 16.6% of 3,876 movements |
| Mar 2026 | 19.5% of 4,465 movements |
| Apr 2026 | 15.1% of 4,596 movements |
| May 2026 | 19.5% of 4,807 movements |
| Jun 2026 | 29.7% of 4,685 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.
| Event | Direction | Disruption that month | Baseline before | Return to baseline |
|---|---|---|---|---|
| Pandemic regime · Jun 2020 | Arrivals | 1.7% of 293 movements | 17.0% across 43,352 flights | returned the next month |
| Pandemic regime · Jun 2020 | Departures | 4.8% of 293 movements | 19.8% across 43,387 flights | returned the next month |
| Summer 2022 breakdown · Jul 2022 | Arrivals | 49.1% of 3,764 movements | 16.3% across 29,858 flights | still above it 8 months later |
| Summer 2022 breakdown · Jul 2022 | Departures | 56.1% of 3,773 movements | 19.1% across 29,850 flights | still above it 8 months later |
| NATS system failure · Aug 2023 | Arrivals | 40.4% of 4,560 movements | 35.3% across 48,697 flights | returned after 2 months |
| NATS system failure · Aug 2023 | Departures | 49.2% of 4,561 movements | 40.1% across 48,672 flights | returned after 2 months |
| Heathrow fire closure · Mar 2025 | Arrivals | 14.9% of 4,110 movements | 28.5% across 49,547 flights | returned the next month |
| Heathrow fire closure · Mar 2025 | Departures | 19.1% of 4,106 movements | 33.2% across 49,582 flights | returned 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, 37.2% across 6 months. Lowest median: Feb, 15.6% 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.
Month-by-month table: median, observed range and sample
| Month | Median | Observed range | Sample |
|---|---|---|---|
| Jan | 17.5% | 5.3–23.6% | 7 months, 26,869 flights |
| Feb | 15.6% | 14.5–18.8% | 7 months, 25,621 flights |
| Mar | 19.5% | 11.6–28.4% | 7 months, 29,607 flights |
| Apr | 25.7% | 15.0–32.3% | 7 months, 30,417 flights |
| May | 26.7% | 18.2–35.6% | 7 months, 31,937 flights |
| Jun | 33.0% | 26.8–52.6% | 7 months, 30,856 flights |
| Jul | 34.0% | 24.0–49.1% | 6 months, 26,672 flights |
| Aug | 30.7% | 23.7–45.2% | 6 months, 26,772 flights |
| Sep | 37.2% | 23.4–47.7% | 6 months, 25,934 flights |
| Oct | 26.9% | 17.5–42.5% | 6 months, 26,565 flights |
| Nov | 19.5% | 10.0–27.4% | 6 months, 24,190 flights |
| Dec | 28.0% | 12.6–46.6% | 6 months, 24,686 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 ↔ CORK, 9.9% of 363 movements. Highest disruption: MAN ↔ KERRY-COUNTY, 53.7% of 123 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.
All route comparisons and sample flags
| Route | Disruption | Cancellations | Sample flag |
|---|---|---|---|
| LGW ↔ CORK | 9.9% of 363 movements | no events in 363 movements | descriptive comparison |
| LGW ↔ SHANNON | 11.0% of 363 movements | no events in 363 movements | descriptive comparison |
| Heathrow ↔ Cork | 13.4% of 1,455 movements | 0.7% of 1,455 movements | descriptive comparison |
| Stansted ↔ Shannon | 14.2% of 802 movements | no events in 802 movements | descriptive comparison |
| LPL ↔ SHANNON | 14.8% of 128 movements | no events in 128 movements | descriptive comparison |
| LPL ↔ CORK | 15.2% of 230 movements | no events in 230 movements | descriptive comparison |
| GLA ↔ DONEGAL | 15.5% of 129 movements | 4.7% of 129 movements | descriptive comparison |
| London City ↔ Dublin | 15.8% of 1,704 movements | 1.8% of 1,704 movements | descriptive comparison |
| LPL ↔ IRELAND-WEST-KNOCK | 17.9% of 436 movements | no events in 436 movements | descriptive comparison |
| Liverpool (John Lennon) ↔ Dublin | 18.5% of 2,384 movements | 0.7% of 2,384 movements | descriptive comparison |
| BRS ↔ CORK | 19.0% of 464 movements | 2.2% of 464 movements | descriptive comparison |
| Luton ↔ Ireland West(Knock) | 19.7% of 549 movements | no events in 549 movements | descriptive comparison |
| Manchester ↔ Cork | 20.1% of 698 movements | 0.1% of 698 movements | descriptive comparison |
| East Midlands International ↔ Dublin | 20.7% of 532 movements | 0.2% of 532 movements | descriptive comparison |
| Glasgow ↔ Dublin | 20.8% of 2,825 movements | 0.8% of 2,825 movements | descriptive comparison |
| Newcastle ↔ Dublin | 20.9% of 1,088 movements | 0.3% of 1,088 movements | descriptive comparison |
| MAN ↔ IRELAND-WEST-KNOCK | 20.9% of 177 movements | no events in 177 movements | descriptive comparison |
| GLA ↔ CORK | 20.9% of 220 movements | 2.3% of 220 movements | descriptive comparison |
| BHX ↔ CORK | 21.2% of 250 movements | no events in 250 movements | descriptive comparison |
| EXT ↔ DUBLIN | 22.1% of 281 movements | 0.7% of 281 movements | descriptive comparison |
| Stansted ↔ Cork | 22.3% of 1,020 movements | 0.1% of 1,020 movements | descriptive comparison |
| EMA ↔ IRELAND-WEST-KNOCK | 22.6% of 164 movements | no events in 164 movements | descriptive comparison |
| Southampton ↔ Dublin | 23.0% of 893 movements | 2.4% of 893 movements | descriptive comparison |
| Gatwick ↔ Dublin | 23.2% of 3,046 movements | 0.0% of 3,046 movements | descriptive comparison |
| MAN ↔ SHANNON | 23.3% of 373 movements | no events in 373 movements | descriptive comparison |
| Heathrow ↔ Shannon | 23.9% of 1,040 movements | 0.9% of 1,040 movements | descriptive comparison |
| Leeds Bradford ↔ Dublin | 24.0% of 1,842 movements | 2.3% of 1,842 movements | descriptive comparison |
| Stansted ↔ Dublin | 24.0% of 3,028 movements | no events in 3,028 movements | descriptive comparison |
| Birmingham ↔ Dublin | 24.2% of 3,869 movements | 1.3% of 3,869 movements | descriptive comparison |
| Heathrow ↔ Dublin | 24.3% of 6,195 movements | 1.0% of 6,195 movements | descriptive comparison |
| CWL ↔ DUBLIN | 24.9% of 357 movements | no events in 357 movements | descriptive comparison |
| Manchester ↔ Dublin | 25.7% of 4,994 movements | 0.8% of 4,994 movements | descriptive comparison |
| Isle Of Man ↔ Dublin | 25.9% of 533 movements | 2.4% of 533 movements | descriptive comparison |
| LHR ↔ IRELAND-WEST-KNOCK | 26.1% of 352 movements | 1.4% of 352 movements | descriptive comparison |
| STN ↔ KERRY-COUNTY | 26.6% of 237 movements | no events in 237 movements | descriptive comparison |
| Bristol ↔ Dublin | 26.6% of 2,114 movements | 0.8% of 2,114 movements | descriptive comparison |
| STN ↔ IRELAND-WEST-KNOCK | 26.9% of 499 movements | no events in 499 movements | descriptive comparison |
| BHX ↔ SHANNON | 27.7% of 188 movements | no events in 188 movements | descriptive comparison |
| BHX ↔ IRELAND-WEST-KNOCK | 28.0% of 164 movements | 0.6% of 164 movements | descriptive comparison |
| Edinburgh ↔ Dublin | 28.3% of 4,022 movements | 1.1% of 4,022 movements | descriptive comparison |
| EDI ↔ SHANNON | 28.5% of 214 movements | no events in 214 movements | descriptive comparison |
| Luton ↔ Dublin | 29.3% of 1,295 movements | 0.1% of 1,295 movements | descriptive comparison |
| Aberdeen ↔ Dublin | 29.4% of 732 movements | 2.7% of 732 movements | descriptive comparison |
| EDI ↔ CORK | 32.0% of 438 movements | no events in 438 movements | descriptive comparison |
| EDI ↔ IRELAND-WEST-KNOCK | 32.6% of 129 movements | no events in 129 movements | descriptive comparison |
| BRS ↔ IRELAND-WEST-KNOCK | 32.9% of 85 movements | no events in 85 movements | descriptive comparison |
| LTN ↔ CORK | 36.5% of 260 movements | no events in 260 movements | descriptive comparison |
| LTN ↔ KERRY-COUNTY | 41.1% of 414 movements | no events in 414 movements | descriptive comparison |
| JER ↔ DUBLIN | 44.4% of 99 movements | no events in 99 movements | descriptive comparison |
| MAN ↔ KERRY-COUNTY | 53.7% of 123 movements | no events in 123 movements | descriptive 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?
20 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 airport | Disruption | Sample flag |
|---|---|---|
| Aberdeen | 29.4% of 732 movements | descriptive comparison |
| Birmingham | 24.3% of 4,471 movements | descriptive comparison |
| Bristol | 25.5% of 2,664 movements | descriptive comparison |
| Cardiff Wales | 25.1% of 358 movements | descriptive comparison |
| Edinburgh | 28.8% of 4,804 movements | descriptive comparison |
| East Midlands International | 21.2% of 698 movements | descriptive comparison |
| Exeter | 22.1% of 281 movements | descriptive comparison |
| Glasgow | 20.6% of 3,175 movements | descriptive comparison |
| Isle Of Man | 25.9% of 533 movements | descriptive comparison |
| Jersey | 44.4% of 99 movements | descriptive comparison |
| Leeds Bradford | 24.0% of 1,842 movements | descriptive comparison |
| London City | 15.8% of 1,704 movements | descriptive comparison |
| Gatwick | 20.8% of 3,772 movements | descriptive comparison |
| Heathrow | 22.6% of 9,042 movements | descriptive comparison |
| Liverpool (John Lennon) | 18.1% of 3,178 movements | descriptive comparison |
| Luton | 29.9% of 2,519 movements | descriptive comparison |
| Manchester | 25.4% of 6,365 movements | descriptive comparison |
| Newcastle | 20.9% of 1,088 movements | descriptive comparison |
| Southampton | 23.0% of 893 movements | descriptive comparison |
| Stansted | 22.6% of 5,586 movements | descriptive 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
23.6% of 53,811 movements arrivals were disrupted, against 28.4% of 53,861 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
0.4% of 53,811 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
Irish Republic appears from Jan 2018 to Jun 2026 with 360,281 arrivals.
The bounds describe the published record, not every commercial service. Final point is not necessarily a nonstop destination.
Archive route pairs: 101.
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?
23.6% of 53,811 movements over July 2025 to June 2026.
How often are they cancelled?
0.8% of 53,811 movements at short notice.
How late is late?
25.3–57.4 minutes; delayed denominator 12,238–25,654
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 complainDefinitions, 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.