How often are these flights late or cancelled?
Portugal(Excluding Madeira)
In the twelve months from July 2025 to June 2026, 28.1% of 28,625 movements arriving into the UK were disrupted — more than fifteen minutes late or cancelled at short notice.
Put the other way round, 71.9% of 28,625 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
28.1% of 28,625 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 |
|---|---|---|---|
| 28.1% of 28,625 movements | 0.7% of 28,625 movements | 27.2–56.4 minutes; delayed denominator 7,851–15,232 | 0.4% of 28,625 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 28,625 movements passed the three-hour mark.
The ladder shows how many movements crossed each threshold. Cancellations are separate: 0.7% of 28,625 movements.
| Delay | Share and sample | One event per movements |
|---|---|---|
| More than 15 minutes | 27.4% of 28,625 movements | 3.6 |
| More than 30 minutes | 15.3% of 28,625 movements | 6.5 |
| More than 60 minutes | 6.0% of 28,625 movements | 16.7 |
| More than 120 minutes | 1.4% of 28,625 movements | 72.7 |
| More than 180 minutes | 0.4% of 28,625 movements | 248.9 |
| More than 360 minutes | 0.1% of 28,625 movements | 773.6 |
Definitions, denominators and limits
Arrivals into UK reporting airports only unless labelled departures. Denominator: operated movements plus short-notice cancellations (M+C). A movement is not a scheduled flight. Unmatched records are data quality, not outcomes. Cells below twenty movements are suppressed; twenty to forty-nine are descriptive and not ranked.
Slightly late or occasionally a disaster?
1.4% of 28,625 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: Nov 2020, 3.4% of 266 movements. Worst month: Sep 2024, 51.2% of 2,848 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 | 20.3% of 1,124 movements |
| Feb 2018 | 21.5% of 1,170 movements |
| Mar 2018 | 31.6% of 1,597 movements |
| Apr 2018 | 26.5% of 2,215 movements |
| May 2018 | 30.7% of 2,433 movements |
| Jun 2018 | 31.1% of 2,587 movements |
| Jul 2018 | 30.5% of 2,749 movements |
| Aug 2018 | 30.2% of 2,782 movements |
| Sep 2018 | 27.2% of 2,495 movements |
| Oct 2018 | 29.7% of 2,311 movements |
| Nov 2018 | 19.8% of 1,334 movements |
| Dec 2018 | 28.1% of 1,369 movements |
| Jan 2019 | 21.9% of 1,339 movements |
| Feb 2019 | 16.9% of 1,349 movements |
| Mar 2019 | 19.2% of 1,635 movements |
| Apr 2019 | 29.8% of 2,443 movements |
| May 2019 | 25.6% of 2,638 movements |
| Jun 2019 | 25.9% of 2,649 movements |
| Jul 2019 | 29.7% of 2,782 movements |
| Aug 2019 | 28.4% of 2,856 movements |
| Sep 2019 | 34.0% of 2,647 movements |
| Oct 2019 | 21.8% of 2,463 movements |
| Nov 2019 | 20.1% of 1,395 movements |
| Dec 2019 | 38.2% of 1,470 movements |
| Jan 2020 | 27.1% of 1,220 movements |
| Feb 2020 | 32.7% of 1,290 movements |
| Mar 2020 | 25.0% of 1,154 movements |
| Apr 2020 | 18.6% of 43 movements — small sample, not ranked |
| May 2020 | 10.8% of 83 movements |
| Jun 2020 | 8.2% of 159 movements |
| Jul 2020 | 4.9% of 771 movements |
| Aug 2020 | 6.4% of 1,490 movements |
| Sep 2020 | 6.2% of 1,551 movements |
| Oct 2020 | 5.1% of 994 movements |
| Nov 2020 | 3.4% of 266 movements |
| Dec 2020 | 18.7% of 402 movements |
| Jan 2021 | 13.5% of 207 movements |
| Feb 2021 | suppressed: fewer than twenty movements |
| Mar 2021 | suppressed: fewer than twenty movements |
| Apr 2021 | 22.0% of 50 movements |
| May 2021 | 13.4% of 677 movements |
| Jun 2021 | 11.8% of 1,273 movements |
| Jul 2021 | 9.6% of 1,212 movements |
| Aug 2021 | 13.2% of 1,764 movements |
| Sep 2021 | 12.1% of 1,810 movements |
| Oct 2021 | 19.2% of 1,788 movements |
| Nov 2021 | 16.5% of 1,136 movements |
| Dec 2021 | 16.9% of 1,201 movements |
| Jan 2022 | 12.5% of 776 movements |
| Feb 2022 | 18.0% of 1,036 movements |
| Mar 2022 | 12.2% of 1,529 movements |
| Apr 2022 | 34.1% of 2,196 movements |
| May 2022 | 34.1% of 2,519 movements |
| Jun 2022 | 41.1% of 2,550 movements |
| Jul 2022 | 39.8% of 2,699 movements |
| Aug 2022 | 33.3% of 2,674 movements |
| Sep 2022 | 44.6% of 2,583 movements |
| Oct 2022 | 39.3% of 2,620 movements |
| Nov 2022 | 30.7% of 1,444 movements |
| Dec 2022 | 43.2% of 1,553 movements |
| Jan 2023 | 26.1% of 1,375 movements |
| Feb 2023 | 25.1% of 1,387 movements |
| Mar 2023 | 46.7% of 1,820 movements |
| Apr 2023 | 40.0% of 2,485 movements |
| May 2023 | 40.8% of 2,652 movements |
| Jun 2023 | 41.8% of 2,760 movements |
| Jul 2023 | 41.1% of 2,934 movements |
| Aug 2023 | 40.0% of 2,982 movements |
| Sep 2023 | 41.4% of 2,864 movements |
| Oct 2023 | 36.7% of 2,803 movements |
| Nov 2023 | 28.3% of 1,585 movements |
| Dec 2023 | 37.2% of 1,604 movements |
| Jan 2024 | 22.2% of 1,350 movements |
| Feb 2024 | 25.6% of 1,506 movements |
| Mar 2024 | 34.7% of 1,825 movements |
| Apr 2024 | 29.6% of 2,468 movements |
| May 2024 | 32.4% of 2,753 movements |
| Jun 2024 | 36.5% of 2,805 movements |
| Jul 2024 | 39.1% of 2,867 movements |
| Aug 2024 | 36.7% of 2,903 movements |
| Sep 2024 | 51.2% of 2,848 movements |
| Oct 2024 | 40.8% of 2,768 movements |
| Nov 2024 | 25.8% of 1,564 movements |
| Dec 2024 | 36.2% of 1,573 movements |
| Jan 2025 | 34.5% of 1,326 movements |
| Feb 2025 | 27.3% of 1,448 movements |
| Mar 2025 | 28.0% of 1,878 movements |
| Apr 2025 | 27.0% of 2,631 movements |
| May 2025 | 27.0% of 2,837 movements |
| Jun 2025 | 29.6% of 2,862 movements |
| Jul 2025 | 39.6% of 2,970 movements |
| Aug 2025 | 32.0% of 2,988 movements |
| Sep 2025 | 36.9% of 2,859 movements |
| Oct 2025 | 30.7% of 2,790 movements |
| Nov 2025 | 26.1% of 1,639 movements |
| Dec 2025 | 26.5% of 1,625 movements |
| Jan 2026 | 22.3% of 1,363 movements |
| Feb 2026 | 22.8% of 1,471 movements |
| Mar 2026 | 23.3% of 2,009 movements |
| Apr 2026 | 16.1% of 2,769 movements |
| May 2026 | 22.4% of 3,080 movements |
| Jun 2026 | 29.3% of 3,062 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 | 8.2% of 159 movements | 26.0% across 20,052 flights | returned the next month |
| Pandemic regime · Jun 2020 | Departures | 10.6% of 160 movements | 26.3% across 19,988 flights | returned the next month |
| Summer 2022 breakdown · Jul 2022 | Arrivals | 39.8% of 2,699 movements | 20.0% across 19,517 flights | still above it 8 months later |
| Summer 2022 breakdown · Jul 2022 | Departures | 50.7% of 2,688 movements | 22.9% across 19,510 flights | still above it 8 months later |
| NATS system failure · Aug 2023 | Arrivals | 40.0% of 2,982 movements | 37.7% across 26,287 flights | returned after 2 months |
| NATS system failure · Aug 2023 | Departures | 43.5% of 2,970 movements | 39.4% across 26,253 flights | returned after 2 months |
| Heathrow fire closure · Mar 2025 | Arrivals | 28.0% of 1,878 movements | 35.4% across 27,148 flights | returned the next month |
| Heathrow fire closure · Mar 2025 | Departures | 27.6% of 1,883 movements | 35.6% across 27,110 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, 39.3% across 6 months. Lowest median: Jan, 22.2% 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 | 22.2% | 12.5–34.5% | 7 months, 8,653 flights |
| Feb | 22.8% | 16.9–27.3% | 7 months, 9,367 flights |
| Mar | 28.0% | 12.2–46.7% | 7 months, 12,293 flights |
| Apr | 29.6% | 16.1–40.0% | 7 months, 17,207 flights |
| May | 30.7% | 22.4–40.8% | 7 months, 18,912 flights |
| Jun | 31.1% | 25.9–41.8% | 7 months, 19,275 flights |
| Jul | 39.3% | 29.7–41.1% | 6 months, 17,001 flights |
| Aug | 32.6% | 28.4–40.0% | 6 months, 17,185 flights |
| Sep | 39.1% | 27.2–51.2% | 6 months, 16,296 flights |
| Oct | 33.7% | 21.8–40.8% | 6 months, 15,755 flights |
| Nov | 26.0% | 19.8–30.7% | 6 months, 8,961 flights |
| Dec | 36.7% | 26.5–43.2% | 6 months, 9,194 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: CWL ↔ FARO, 4.8% of 84 movements. Highest disruption: LTN ↔ LISBON, 55.7% of 879 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 |
|---|---|---|---|
| CWL ↔ FARO | 4.8% of 84 movements | no events in 84 movements | descriptive comparison |
| EXT ↔ FARO | 5.1% of 59 movements | no events in 59 movements | descriptive comparison |
| ABZ ↔ FARO | 5.5% of 91 movements | 1.1% of 91 movements | descriptive comparison |
| Liverpool (John Lennon) ↔ Faro | 11.5% of 765 movements | 0.7% of 765 movements | descriptive comparison |
| Belfast International ↔ Faro | 11.9% of 798 movements | 0.3% of 798 movements | descriptive comparison |
| NCL ↔ FARO | 12.2% of 485 movements | no events in 485 movements | descriptive comparison |
| BOH ↔ FARO | 12.6% of 317 movements | no events in 317 movements | descriptive comparison |
| GLA ↔ FARO | 13.5% of 481 movements | 1.0% of 481 movements | descriptive comparison |
| LCY ↔ FARO | 15.1% of 106 movements | 0.9% of 106 movements | descriptive comparison |
| East Midlands International ↔ Faro | 15.3% of 653 movements | 0.2% of 653 movements | descriptive comparison |
| SOU ↔ FARO | 15.7% of 51 movements | 2.0% of 51 movements | descriptive comparison |
| MME ↔ FARO | 16.4% of 61 movements | no events in 61 movements | descriptive comparison |
| Birmingham ↔ Faro | 16.4% of 877 movements | 0.1% of 877 movements | descriptive comparison |
| EDI ↔ FARO | 19.1% of 476 movements | no events in 476 movements | descriptive comparison |
| SEN ↔ FARO | 19.6% of 143 movements | no events in 143 movements | descriptive comparison |
| Heathrow ↔ Faro | 19.7% of 527 movements | 0.8% of 527 movements | descriptive comparison |
| Bristol ↔ Faro | 20.0% of 1,192 movements | 0.8% of 1,192 movements | descriptive comparison |
| LBA ↔ OPORTO-PORTUGAL | 20.3% of 59 movements | 1.7% of 59 movements | descriptive comparison |
| Leeds Bradford ↔ Faro | 20.9% of 647 movements | 0.8% of 647 movements | descriptive comparison |
| Stansted ↔ Faro | 21.7% of 1,244 movements | 0.3% of 1,244 movements | descriptive comparison |
| LPL ↔ OPORTO-PORTUGAL | 22.1% of 68 movements | no events in 68 movements | descriptive comparison |
| BFS ↔ OPORTO-PORTUGAL | 24.6% of 61 movements | no events in 61 movements | descriptive comparison |
| Gatwick ↔ Oporto (Portugal) | 26.6% of 1,572 movements | 1.0% of 1,572 movements | descriptive comparison |
| Gatwick ↔ Faro | 27.3% of 2,655 movements | 1.0% of 2,655 movements | descriptive comparison |
| Luton ↔ Faro | 27.9% of 1,162 movements | 0.4% of 1,162 movements | descriptive comparison |
| BHX ↔ LISBON | 28.4% of 232 movements | 0.4% of 232 movements | descriptive comparison |
| BRS ↔ OPORTO-PORTUGAL | 28.5% of 376 movements | 1.1% of 376 movements | descriptive comparison |
| Stansted ↔ Oporto (Portugal) | 28.8% of 1,092 movements | 0.3% of 1,092 movements | descriptive comparison |
| EDI ↔ OPORTO-PORTUGAL | 28.8% of 208 movements | no events in 208 movements | descriptive comparison |
| LTN ↔ OPORTO-PORTUGAL | 28.9% of 194 movements | no events in 194 movements | descriptive comparison |
| Manchester ↔ Faro | 30.2% of 1,368 movements | 0.6% of 1,368 movements | descriptive comparison |
| GLA ↔ OPORTO-PORTUGAL | 30.3% of 66 movements | no events in 66 movements | descriptive comparison |
| BHX ↔ OPORTO-PORTUGAL | 30.3% of 244 movements | no events in 244 movements | descriptive comparison |
| Stansted ↔ Lisbon | 31.5% of 1,212 movements | 0.6% of 1,212 movements | descriptive comparison |
| Heathrow ↔ Lisbon | 34.2% of 3,801 movements | 0.7% of 3,801 movements | descriptive comparison |
| Gatwick ↔ Lisbon | 35.7% of 1,620 movements | 2.1% of 1,620 movements | descriptive comparison |
| Manchester ↔ Oporto (Portugal) | 37.4% of 514 movements | 0.2% of 514 movements | descriptive comparison |
| Manchester ↔ Lisbon | 44.7% of 1,226 movements | 0.8% of 1,226 movements | descriptive comparison |
| EDI ↔ LISBON | 47.0% of 334 movements | 0.3% of 334 movements | descriptive comparison |
| BRS ↔ LISBON | 48.3% of 443 movements | 0.7% of 443 movements | descriptive comparison |
| Luton ↔ Lisbon | 55.7% of 879 movements | 0.3% of 879 movements | descriptive comparison |
| GLA ↔ LISBON | 50.0% of 28 movements — small sample, not ranked | no events in 28 movements — small sample, not ranked | small sample; not ranked |
| LHR ↔ AZORES-PONTA-DELGADA | 40.8% of 49 movements — small sample, not ranked | 2.0% of 49 movements — small sample, not ranked | small sample; not ranked |
| LPL ↔ LISBON | 42.9% of 28 movements — small sample, not ranked | no events in 28 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?
22 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 | 5.5% of 91 movements | descriptive comparison |
| Belfast International | 12.9% of 860 movements | descriptive comparison |
| Birmingham | 21.0% of 1,353 movements | descriptive comparison |
| Bournemouth | 12.6% of 317 movements | descriptive comparison |
| Bristol | 27.8% of 2,011 movements | descriptive comparison |
| Cardiff Wales | 4.8% of 84 movements | descriptive comparison |
| Edinburgh | 30.3% of 1,018 movements | descriptive comparison |
| East Midlands International | 15.4% of 657 movements | descriptive comparison |
| Exeter | 5.1% of 59 movements | descriptive comparison |
| Glasgow | 17.2% of 575 movements | descriptive comparison |
| Leeds Bradford | 20.8% of 706 movements | descriptive comparison |
| London City | 15.1% of 106 movements | descriptive comparison |
| Gatwick | 29.4% of 5,848 movements | descriptive comparison |
| Heathrow | 32.5% of 4,379 movements | descriptive comparison |
| Liverpool (John Lennon) | 13.4% of 861 movements | descriptive comparison |
| Luton | 38.9% of 2,235 movements | descriptive comparison |
| Manchester | 37.1% of 3,108 movements | descriptive comparison |
| Teesside International Airport | 16.4% of 61 movements | descriptive comparison |
| Newcastle | 12.5% of 502 movements | descriptive comparison |
| Southend | 19.6% of 143 movements | descriptive comparison |
| Southampton | 15.7% of 51 movements | descriptive comparison |
| Stansted | 27.1% of 3,565 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
28.1% of 28,625 movements arrivals were disrupted, against 27.8% of 28,550 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 28,625 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
Portugal(Excluding Madeira) appears from Jan 2018 to Jun 2026 with 190,645 arrivals.
The bounds describe the published record, not every commercial service. Final point is not necessarily a nonstop destination.
Archive route pairs: 88.
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?
28.1% of 28,625 movements over July 2025 to June 2026.
How often are they cancelled?
0.7% of 28,625 movements at short notice.
How late is late?
27.2–56.4 minutes; delayed denominator 7,851–15,232
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.