How often are these flights late or cancelled?
Usa
In the twelve months from July 2025 to June 2026, 23.8% of 47,616 movements arriving into the UK were disrupted — more than fifteen minutes late or cancelled at short notice.
Put the other way round, 76.2% of 47,616 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
23.8% of 47,616 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 |
|---|---|---|---|
| 23.8% of 47,616 movements | 1.8% of 47,616 movements | 39.5–78.3 minutes; delayed denominator 10,476–19,557 | 1.3% of 47,616 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?
1.3% of 47,616 movements passed the three-hour mark.
The ladder shows how many movements crossed each threshold. Cancellations are separate: 1.8% of 47,616 movements.
| Delay | Share and sample | One event per movements |
|---|---|---|
| More than 15 minutes | 22.0% of 47,616 movements | 4.5 |
| More than 30 minutes | 13.4% of 47,616 movements | 7.5 |
| More than 60 minutes | 6.8% of 47,616 movements | 14.8 |
| More than 120 minutes | 2.6% of 47,616 movements | 38.4 |
| More than 180 minutes | 1.3% of 47,616 movements | 78.1 |
| More than 360 minutes | 0.3% of 47,616 movements | 290.3 |
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?
2.6% of 47,616 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: May 2020, 5.0% of 282 movements. Worst month: Dec 2022, 52.4% of 3,355 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 | 20.2% of 3,487 movements |
| Feb 2018 | 17.9% of 3,116 movements |
| Mar 2018 | 35.7% of 3,712 movements |
| Apr 2018 | 17.1% of 4,060 movements |
| May 2018 | 22.8% of 4,410 movements |
| Jun 2018 | 31.1% of 4,422 movements |
| Jul 2018 | 28.3% of 4,622 movements |
| Aug 2018 | 24.7% of 4,612 movements |
| Sep 2018 | 15.9% of 4,396 movements |
| Oct 2018 | 14.2% of 4,278 movements |
| Nov 2018 | 25.5% of 3,576 movements |
| Dec 2018 | 24.1% of 3,686 movements |
| Jan 2019 | 19.3% of 3,568 movements |
| Feb 2019 | 17.2% of 3,195 movements |
| Mar 2019 | 18.4% of 3,730 movements |
| Apr 2019 | 20.2% of 4,095 movements |
| May 2019 | 25.8% of 4,420 movements |
| Jun 2019 | 37.5% of 4,403 movements |
| Jul 2019 | 30.8% of 4,598 movements |
| Aug 2019 | 29.9% of 4,591 movements |
| Sep 2019 | 20.4% of 4,217 movements |
| Oct 2019 | 18.5% of 4,115 movements |
| Nov 2019 | 16.4% of 3,539 movements |
| Dec 2019 | 23.6% of 3,638 movements |
| Jan 2020 | 14.1% of 3,537 movements |
| Feb 2020 | 14.8% of 3,352 movements |
| Mar 2020 | 16.6% of 2,630 movements |
| Apr 2020 | 8.6% of 292 movements |
| May 2020 | 5.0% of 282 movements |
| Jun 2020 | 6.4% of 345 movements |
| Jul 2020 | 7.8% of 474 movements |
| Aug 2020 | 9.4% of 639 movements |
| Sep 2020 | 5.7% of 680 movements |
| Oct 2020 | 6.6% of 785 movements |
| Nov 2020 | 13.0% of 630 movements |
| Dec 2020 | 18.5% of 583 movements |
| Jan 2021 | 15.9% of 571 movements |
| Feb 2021 | 15.4% of 487 movements |
| Mar 2021 | 12.8% of 572 movements |
| Apr 2021 | 11.9% of 679 movements |
| May 2021 | 10.0% of 720 movements |
| Jun 2021 | 15.9% of 791 movements |
| Jul 2021 | 23.7% of 923 movements |
| Aug 2021 | 24.9% of 1,068 movements |
| Sep 2021 | 15.9% of 1,330 movements |
| Oct 2021 | 17.7% of 1,528 movements |
| Nov 2021 | 27.7% of 1,829 movements |
| Dec 2021 | 31.6% of 2,170 movements |
| Jan 2022 | 22.6% of 2,106 movements |
| Feb 2022 | 19.9% of 1,715 movements |
| Mar 2022 | 27.2% of 2,299 movements |
| Apr 2022 | 30.1% of 2,996 movements |
| May 2022 | 32.3% of 3,615 movements |
| Jun 2022 | 40.9% of 3,786 movements |
| Jul 2022 | 34.2% of 3,935 movements |
| Aug 2022 | 25.2% of 3,777 movements |
| Sep 2022 | 31.9% of 3,645 movements |
| Oct 2022 | 26.1% of 3,745 movements |
| Nov 2022 | 23.5% of 3,308 movements |
| Dec 2022 | 52.4% of 3,355 movements |
| Jan 2023 | 28.7% of 3,292 movements |
| Feb 2023 | 27.8% of 3,073 movements |
| Mar 2023 | 38.5% of 3,692 movements |
| Apr 2023 | 34.1% of 4,074 movements |
| May 2023 | 35.6% of 4,404 movements |
| Jun 2023 | 44.6% of 4,381 movements |
| Jul 2023 | 37.6% of 4,665 movements |
| Aug 2023 | 31.9% of 4,676 movements |
| Sep 2023 | 31.2% of 4,534 movements |
| Oct 2023 | 23.5% of 4,522 movements |
| Nov 2023 | 21.1% of 3,621 movements |
| Dec 2023 | 28.7% of 3,741 movements |
| Jan 2024 | 27.8% of 3,414 movements |
| Feb 2024 | 19.2% of 3,125 movements |
| Mar 2024 | 25.7% of 3,752 movements |
| Apr 2024 | 26.7% of 4,176 movements |
| May 2024 | 31.2% of 4,543 movements |
| Jun 2024 | 30.1% of 4,570 movements |
| Jul 2024 | 31.7% of 4,668 movements |
| Aug 2024 | 30.0% of 4,649 movements |
| Sep 2024 | 34.9% of 4,505 movements |
| Oct 2024 | 21.6% of 4,323 movements |
| Nov 2024 | 27.0% of 3,417 movements |
| Dec 2024 | 33.7% of 3,548 movements |
| Jan 2025 | 27.9% of 3,428 movements |
| Feb 2025 | 19.7% of 3,025 movements |
| Mar 2025 | 28.9% of 3,576 movements |
| Apr 2025 | 19.7% of 4,058 movements |
| May 2025 | 27.5% of 4,454 movements |
| Jun 2025 | 25.3% of 4,486 movements |
| Jul 2025 | 29.4% of 4,648 movements |
| Aug 2025 | 26.6% of 4,676 movements |
| Sep 2025 | 20.1% of 4,461 movements |
| Oct 2025 | 25.2% of 4,271 movements |
| Nov 2025 | 24.0% of 3,342 movements |
| Dec 2025 | 30.0% of 3,460 movements |
| Jan 2026 | 26.3% of 3,346 movements |
| Feb 2026 | 21.4% of 2,986 movements |
| Mar 2026 | 16.1% of 3,524 movements |
| Apr 2026 | 19.4% of 4,029 movements |
| May 2026 | 22.4% of 4,474 movements |
| Jun 2026 | 24.3% of 4,399 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 | 6.4% of 345 movements | 19.7% across 39,194 flights | returned the next month |
| Pandemic regime · Jun 2020 | Departures | 15.3% of 347 movements | 20.9% across 39,162 flights | returned the next month |
| Summer 2022 breakdown · Jul 2022 | Arrivals | 34.2% of 3,935 movements | 26.2% across 25,365 flights | returned the next month |
| Summer 2022 breakdown · Jul 2022 | Departures | 55.4% of 3,942 movements | 30.0% across 25,407 flights | returned after 3 months |
| NATS system failure · Aug 2023 | Arrivals | 31.9% of 4,676 movements | 33.8% across 45,411 flights | returned the next month |
| NATS system failure · Aug 2023 | Departures | 33.2% of 4,681 movements | 33.7% across 45,474 flights | returned the next month |
| Heathrow fire closure · Mar 2025 | Arrivals | 28.9% of 3,576 movements | 28.3% across 48,604 flights | returned the next month |
| Heathrow fire closure · Mar 2025 | Departures | 26.3% of 3,603 movements | 27.3% across 48,668 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: Jul, 31.2% across 6 months. Lowest median: Feb, 19.7% 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 | 26.3% | 19.3–28.7% | 7 months, 22,641 flights |
| Feb | 19.7% | 17.2–27.8% | 7 months, 20,235 flights |
| Mar | 27.2% | 16.1–38.5% | 7 months, 24,285 flights |
| Apr | 20.2% | 17.1–34.1% | 7 months, 27,488 flights |
| May | 27.5% | 22.4–35.6% | 7 months, 30,320 flights |
| Jun | 31.1% | 24.3–44.6% | 7 months, 30,447 flights |
| Jul | 31.2% | 28.3–37.6% | 6 months, 27,136 flights |
| Aug | 28.3% | 24.7–31.9% | 6 months, 26,981 flights |
| Sep | 25.8% | 15.9–34.9% | 6 months, 25,758 flights |
| Oct | 22.5% | 14.2–26.1% | 6 months, 25,254 flights |
| Nov | 23.7% | 16.4–27.0% | 6 months, 20,803 flights |
| Dec | 29.3% | 23.6–52.4% | 6 months, 21,428 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: GLA ↔ NEW-YORK-NEWARK, 9.4% of 53 movements. Highest disruption: MAN ↔ MELBOURNE-FLATS, 40.0% of 65 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 |
|---|---|---|---|
| GLA ↔ NEW-YORK-NEWARK | 9.4% of 53 movements | no events in 53 movements | descriptive comparison |
| MAN ↔ ATLANTA | 10.7% of 317 movements | 0.9% of 317 movements | descriptive comparison |
| LHR ↔ TAMPA | 12.7% of 363 movements | 1.9% of 363 movements | descriptive comparison |
| LHR ↔ NASHVILLE-METROPOLITAN | 15.7% of 376 movements | 1.3% of 376 movements | descriptive comparison |
| Heathrow ↔ Boston | 16.4% of 2,729 movements | 2.1% of 2,729 movements | descriptive comparison |
| LGW ↔ MIAMI-INTERNATIONAL | 16.7% of 78 movements | 1.3% of 78 movements | descriptive comparison |
| LHR ↔ RALEIGH | 17.6% of 364 movements | 1.9% of 364 movements | descriptive comparison |
| EDI ↔ PHILADELPHIA-INTERNATIONAL | 17.6% of 193 movements | 1.0% of 193 movements | descriptive comparison |
| Heathrow ↔ Los Angeles International | 18.0% of 3,029 movements | 1.3% of 3,029 movements | descriptive comparison |
| LHR ↔ MINNEAPOLIS-ST-PAUL | 18.6% of 366 movements | 0.3% of 366 movements | descriptive comparison |
| Heathrow ↔ Las Vegas | 19.0% of 857 movements | 0.2% of 857 movements | descriptive comparison |
| Heathrow ↔ San Francisco | 19.6% of 2,194 movements | 0.8% of 2,194 movements | descriptive comparison |
| LGW ↔ BOSTON | 19.7% of 157 movements | 0.6% of 157 movements | descriptive comparison |
| Heathrow ↔ Philadelphia International | 19.9% of 955 movements | 2.9% of 955 movements | descriptive comparison |
| Heathrow ↔ Denver International | 20.0% of 931 movements | 0.4% of 931 movements | descriptive comparison |
| LGW ↔ LOS-ANGELES-INTERNATIONAL | 20.0% of 85 movements | no events in 85 movements | descriptive comparison |
| MAN ↔ LAS-VEGAS | 20.0% of 80 movements | no events in 80 movements | descriptive comparison |
| Heathrow ↔ Atlanta | 20.2% of 1,824 movements | 1.0% of 1,824 movements | descriptive comparison |
| LGW ↔ MELBOURNE-FLATS | 20.3% of 64 movements | no events in 64 movements | descriptive comparison |
| Heathrow ↔ Miami International | 20.5% of 1,944 movements | 1.6% of 1,944 movements | descriptive comparison |
| Heathrow ↔ New York (Jf Kennedy) | 20.6% of 7,462 movements | 2.3% of 7,462 movements | descriptive comparison |
| LHR ↔ PORTLAND-OREGON | 21.6% of 291 movements | no events in 291 movements | descriptive comparison |
| LHR ↔ NEW-ORLEANS | 21.8% of 216 movements | 1.9% of 216 movements | descriptive comparison |
| Heathrow ↔ Seattle (Tacoma) | 21.8% of 1,324 movements | 1.0% of 1,324 movements | descriptive comparison |
| Heathrow ↔ Orlando | 22.4% of 626 movements | 1.1% of 626 movements | descriptive comparison |
| Manchester ↔ Orlando | 22.9% of 612 movements | 1.0% of 612 movements | descriptive comparison |
| Heathrow ↔ San Diego | 22.9% of 524 movements | 0.8% of 524 movements | descriptive comparison |
| LHR ↔ SALT-LAKE-CITY | 23.1% of 264 movements | 4.2% of 264 movements | descriptive comparison |
| EDI ↔ BOSTON | 24.2% of 364 movements | 0.5% of 364 movements | descriptive comparison |
| LGW ↔ TAMPA | 24.5% of 319 movements | 2.5% of 319 movements | descriptive comparison |
| Heathrow ↔ Washington (Dulles) | 25.1% of 1,996 movements | 2.6% of 1,996 movements | descriptive comparison |
| LHR ↔ DETROIT | 25.1% of 367 movements | 0.3% of 367 movements | descriptive comparison |
| LHR ↔ CINCINNATI | 25.1% of 247 movements | 1.6% of 247 movements | descriptive comparison |
| Edinburgh ↔ New York (Jf Kennedy) | 25.5% of 557 movements | 0.2% of 557 movements | descriptive comparison |
| Heathrow ↔ New York (Newark) | 25.7% of 3,274 movements | 3.3% of 3,274 movements | descriptive comparison |
| LHR ↔ PITTSBURGH | 26.8% of 295 movements | 0.3% of 295 movements | descriptive comparison |
| EDI ↔ ATLANTA | 26.8% of 224 movements | 1.3% of 224 movements | descriptive comparison |
| EDI ↔ ORLANDO | 28.1% of 64 movements | no events in 64 movements | descriptive comparison |
| Manchester ↔ New York (Jf Kennedy) | 29.2% of 514 movements | 6.0% of 514 movements | descriptive comparison |
| LHR ↔ BALTIMORE | 30.0% of 340 movements | 2.6% of 340 movements | descriptive comparison |
| Heathrow ↔ Houston | 30.8% of 1,364 movements | 1.3% of 1,364 movements | descriptive comparison |
| Gatwick ↔ Orlando | 30.9% of 826 movements | 1.3% of 826 movements | descriptive comparison |
| Heathrow ↔ Austin (Bergstrom) | 32.0% of 541 movements | 2.4% of 541 movements | descriptive comparison |
| Heathrow ↔ Phoenix | 32.1% of 577 movements | 1.7% of 577 movements | descriptive comparison |
| Heathrow ↔ Chicago (O'Hare) | 32.4% of 2,924 movements | 1.6% of 2,924 movements | descriptive comparison |
| Heathrow ↔ Charlotte | 32.5% of 1,085 movements | 3.0% of 1,085 movements | descriptive comparison |
| EDI ↔ NEW-YORK-NEWARK | 33.0% of 452 movements | 1.3% of 452 movements | descriptive comparison |
| EDI ↔ WASHINGTON-DULLES | 33.2% of 280 movements | 2.1% of 280 movements | descriptive comparison |
| LGW ↔ NEW-YORK-JF-KENNEDY | 36.4% of 472 movements | 4.0% of 472 movements | descriptive comparison |
| EDI ↔ CHICAGO-O-HARE | 38.2% of 178 movements | 1.1% of 178 movements | descriptive comparison |
| Heathrow ↔ Dallas/Fort Worth | 38.3% of 1,798 movements | 2.8% of 1,798 movements | descriptive comparison |
| MAN ↔ MELBOURNE-FLATS | 40.0% of 65 movements | no events in 65 movements | descriptive comparison |
| GLA ↔ MELBOURNE-FLATS | 29.5% of 44 movements — small sample, not ranked | no events in 44 movements — small sample, not ranked | small sample; not ranked |
| LGW ↔ LAS-VEGAS | 35.4% of 48 movements — small sample, not ranked | 2.1% of 48 movements — small sample, not ranked | small sample; not ranked |
| LHR ↔ ST-LOUIS-LAMBERT | 48.8% of 41 movements — small sample, not ranked | 4.9% of 41 movements — small sample, not ranked | small sample; not ranked |
| NCL ↔ MELBOURNE-FLATS | 48.6% of 37 movements — small sample, not ranked | no events in 37 movements — small sample, not ranked | small 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?
6 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 |
|---|---|---|
| Edinburgh | 28.2% of 2,314 movements | descriptive comparison |
| Glasgow | 19.8% of 101 movements | descriptive comparison |
| Gatwick | 29.1% of 2,050 movements | descriptive comparison |
| Heathrow | 23.3% of 41,489 movements | descriptive comparison |
| Manchester | 23.1% of 1,590 movements | descriptive comparison |
| Newcastle | 48.6% of 37 movements — small sample, not ranked | small 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
23.8% of 47,616 movements arrivals were disrupted, against 23.9% of 47,722 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
1.3% of 47,616 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
Usa appears from Jan 2018 to Jun 2026 with 329,673 arrivals.
The bounds describe the published record, not every commercial service. Final point is not necessarily a nonstop destination.
Archive route pairs: 312.
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?
23.8% of 47,616 movements over July 2025 to June 2026.
How often are they cancelled?
1.8% of 47,616 movements at short notice.
How late is late?
39.5–78.3 minutes; delayed denominator 10,476–19,557
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 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.