How often are these flights late or cancelled?
Air Canada
In the twelve months from July 2025 to June 2026, 30.0% of 3,369 movements arriving into the UK were disrupted — more than fifteen minutes late or cancelled at short notice.
Put the other way round, 70.0% of 3,369 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
30.0% of 3,369 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 |
|---|---|---|---|
| 30.0% of 3,369 movements | 2.8% of 3,369 movements | 36.7–69.9 minutes; delayed denominator 915–1,656 | 1.5% of 3,369 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?
1.5% of 3,369 movements passed the three-hour mark.
The ladder shows how many movements crossed each threshold. Cancellations are separate: 2.8% of 3,369 movements.
| Delay | Share and sample | One event per movements |
|---|---|---|
| More than 15 minutes | 27.2% of 3,369 movements | 3.7 |
| More than 30 minutes | 16.9% of 3,369 movements | 5.9 |
| More than 60 minutes | 8.3% of 3,369 movements | 12.0 |
| More than 120 minutes | 3.2% of 3,369 movements | 31.2 |
| More than 180 minutes | 1.5% of 3,369 movements | 67.4 |
| More than 360 minutes | 0.3% of 3,369 movements | 374.3 |
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?
3.2% of 3,369 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: Sep 2020, 2.5% of 81 movements. Worst month: Jun 2022, 67.6% of 315 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 | 51.0% of 259 movements |
| Feb 2018 | 30.7% of 231 movements |
| Mar 2018 | 45.1% of 266 movements |
| Apr 2018 | 32.5% of 274 movements |
| May 2018 | 24.1% of 299 movements |
| Jun 2018 | 33.9% of 360 movements |
| Jul 2018 | 38.6% of 394 movements |
| Aug 2018 | 31.9% of 395 movements |
| Sep 2018 | 18.7% of 380 movements |
| Oct 2018 | 23.1% of 299 movements |
| Nov 2018 | 37.6% of 255 movements |
| Dec 2018 | 38.6% of 264 movements |
| Jan 2019 | 39.4% of 264 movements |
| Feb 2019 | 60.9% of 238 movements |
| Mar 2019 | 35.8% of 254 movements |
| Apr 2019 | 30.8% of 237 movements |
| May 2019 | 32.9% of 249 movements |
| Jun 2019 | 33.0% of 309 movements |
| Jul 2019 | 33.7% of 338 movements |
| Aug 2019 | 23.0% of 339 movements |
| Sep 2019 | 21.4% of 294 movements |
| Oct 2019 | 22.4% of 250 movements |
| Nov 2019 | 28.8% of 229 movements |
| Dec 2019 | 43.3% of 240 movements |
| Jan 2020 | 38.0% of 234 movements |
| Feb 2020 | 31.0% of 216 movements |
| Mar 2020 | 21.7% of 198 movements |
| Apr 2020 | 10.2% of 49 movements — small sample, not ranked |
| May 2020 | 2.3% of 44 movements — small sample, not ranked |
| Jun 2020 | no events in 47 movements — small sample, not ranked |
| Jul 2020 | 9.7% of 62 movements |
| Aug 2020 | 8.3% of 72 movements |
| Sep 2020 | 2.5% of 81 movements |
| Oct 2020 | 3.8% of 80 movements |
| Nov 2020 | 13.6% of 59 movements |
| Dec 2020 | 31.6% of 57 movements |
| Jan 2021 | 18.0% of 50 movements |
| Feb 2021 | 18.8% of 32 movements — small sample, not ranked |
| Mar 2021 | 7.4% of 27 movements — small sample, not ranked |
| Apr 2021 | 6.5% of 31 movements — small sample, not ranked |
| May 2021 | 12.9% of 31 movements — small sample, not ranked |
| Jun 2021 | 5.9% of 34 movements — small sample, not ranked |
| Jul 2021 | 17.8% of 45 movements — small sample, not ranked |
| Aug 2021 | 65.2% of 69 movements |
| Sep 2021 | 29.3% of 92 movements |
| Oct 2021 | 25.6% of 117 movements |
| Nov 2021 | 13.0% of 123 movements |
| Dec 2021 | 42.6% of 129 movements |
| Jan 2022 | 25.5% of 106 movements |
| Feb 2022 | 13.5% of 74 movements |
| Mar 2022 | 32.7% of 101 movements |
| Apr 2022 | 40.3% of 134 movements |
| May 2022 | 43.8% of 208 movements |
| Jun 2022 | 67.6% of 315 movements |
| Jul 2022 | 56.2% of 331 movements |
| Aug 2022 | 44.8% of 328 movements |
| Sep 2022 | 52.9% of 312 movements |
| Oct 2022 | 26.9% of 264 movements |
| Nov 2022 | 36.0% of 236 movements |
| Dec 2022 | 66.1% of 248 movements |
| Jan 2023 | 37.5% of 248 movements |
| Feb 2023 | 35.3% of 221 movements |
| Mar 2023 | 47.9% of 238 movements |
| Apr 2023 | 41.0% of 210 movements |
| May 2023 | 45.8% of 286 movements |
| Jun 2023 | 63.0% of 308 movements |
| Jul 2023 | 45.6% of 340 movements |
| Aug 2023 | 32.5% of 332 movements |
| Sep 2023 | 38.2% of 322 movements |
| Oct 2023 | 37.8% of 296 movements |
| Nov 2023 | 32.5% of 246 movements |
| Dec 2023 | 40.2% of 254 movements |
| Jan 2024 | 50.8% of 236 movements |
| Feb 2024 | 35.3% of 218 movements |
| Mar 2024 | 44.1% of 238 movements |
| Apr 2024 | 38.9% of 234 movements |
| May 2024 | 35.3% of 300 movements |
| Jun 2024 | 32.6% of 310 movements |
| Jul 2024 | 24.8% of 326 movements |
| Aug 2024 | 33.9% of 327 movements |
| Sep 2024 | 24.8% of 315 movements |
| Oct 2024 | 19.5% of 292 movements |
| Nov 2024 | 21.2% of 240 movements |
| Dec 2024 | 34.7% of 248 movements |
| Jan 2025 | 36.6% of 232 movements |
| Feb 2025 | 43.9% of 212 movements |
| Mar 2025 | 20.2% of 248 movements |
| Apr 2025 | 15.9% of 283 movements |
| May 2025 | 21.7% of 295 movements |
| Jun 2025 | 20.0% of 310 movements |
| Jul 2025 | 22.7% of 335 movements |
| Aug 2025 | 37.6% of 335 movements |
| Sep 2025 | 17.0% of 317 movements |
| Oct 2025 | 16.6% of 289 movements |
| Nov 2025 | 31.2% of 240 movements |
| Dec 2025 | 51.2% of 248 movements |
| Jan 2026 | 54.4% of 237 movements |
| Feb 2026 | 31.5% of 213 movements |
| Mar 2026 | 21.3% of 253 movements |
| Apr 2026 | 25.8% of 279 movements |
| May 2026 | 23.6% of 301 movements |
| Jun 2026 | 34.5% of 322 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 | no events in 47 movements — small sample, not ranked | 25.7% across 2,740 flights | returned the next month |
| Pandemic regime · Jun 2020 | Departures | 8.5% of 47 movements — small sample, not ranked | 18.7% across 2,749 flights | returned the next month |
| Summer 2022 breakdown · Jul 2022 | Arrivals | 56.2% of 331 movements | 34.7% across 1,513 flights | returned after 3 months |
| Summer 2022 breakdown · Jul 2022 | Departures | 50.8% of 333 movements | 21.7% across 1,511 flights | returned after 3 months |
| NATS system failure · Aug 2023 | Arrivals | 32.5% of 332 movements | 45.2% across 3,239 flights | returned the next month |
| NATS system failure · Aug 2023 | Departures | 42.2% of 332 movements | 36.9% across 3,245 flights | returned the next month |
| Heathrow fire closure · Mar 2025 | Arrivals | 20.2% of 248 movements | 32.5% across 3,274 flights | returned the next month |
| Heathrow fire closure · Mar 2025 | Departures | 17.3% of 248 movements | 23.4% across 3,279 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: Dec, 41.7% across 6 months. Lowest median: Oct, 22.7% across 6 months.
Even the same calendar month differs across years. This is a record, not a forecast; pandemic years are excluded from the summaries.
Each cell is one calendar month of one year; the number is the share of that month’s arrivals that were disrupted. Darker means worse. A blank cell means no published data, not zero.
Month-by-month table: median, observed range and sample
| Month | Median | Observed range | Sample |
|---|---|---|---|
| Jan | 39.4% | 25.5–54.4% | 7 months, 1,582 flights |
| Feb | 35.3% | 13.5–60.9% | 7 months, 1,407 flights |
| Mar | 35.8% | 20.2–47.9% | 7 months, 1,598 flights |
| Apr | 32.5% | 15.9–41.0% | 7 months, 1,651 flights |
| May | 32.9% | 21.7–45.8% | 7 months, 1,938 flights |
| Jun | 33.9% | 20.0–67.6% | 7 months, 2,234 flights |
| Jul | 36.2% | 22.7–56.2% | 6 months, 2,064 flights |
| Aug | 33.2% | 23.0–44.8% | 6 months, 2,056 flights |
| Sep | 23.1% | 17.0–52.9% | 6 months, 1,940 flights |
| Oct | 22.7% | 16.6–37.8% | 6 months, 1,690 flights |
| Nov | 31.9% | 21.2–37.6% | 6 months, 1,446 flights |
| Dec | 41.7% | 34.7–66.1% | 6 months, 1,502 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: LHR ↔ VANCOUVER, 17.0% of 365 movements. Highest disruption: LHR ↔ OTTAWA-INTERNATIONAL, 39.3% of 178 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 |
|---|---|---|---|
| Heathrow ↔ Vancouver | 17.0% of 365 movements | 1.6% of 365 movements | descriptive comparison |
| EDI ↔ TORONTO | 22.9% of 175 movements | 4.0% of 175 movements | descriptive comparison |
| Heathrow ↔ Calgary | 24.4% of 365 movements | 1.6% of 365 movements | descriptive comparison |
| LHR ↔ HALIFAX-INT | 26.6% of 350 movements | 2.9% of 350 movements | descriptive comparison |
| Heathrow ↔ Montreal (Dorval) | 32.7% of 520 movements | 3.3% of 520 movements | descriptive comparison |
| Heathrow ↔ Toronto | 33.7% of 1,233 movements | 2.8% of 1,233 movements | descriptive comparison |
| Heathrow ↔ Mumbai | 37.0% of 92 movements | 3.3% of 92 movements | descriptive comparison |
| LHR ↔ OTTAWA-INTERNATIONAL | 39.3% of 178 movements | 3.4% of 178 movements | descriptive comparison |
| EDI ↔ MONTREAL-DORVAL | 33.3% of 42 movements — small sample, not ranked | 4.8% of 42 movements — small sample, not ranked | small sample; not ranked |
| MAN ↔ TORONTO | 44.9% of 49 movements — small sample, not ranked | 6.1% of 49 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?
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 airport | Disruption | Sample flag |
|---|---|---|
| Edinburgh | 24.9% of 217 movements | descriptive comparison |
| Heathrow | 30.1% of 3,103 movements | descriptive comparison |
| Manchester | 44.9% of 49 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
30.0% of 3,369 movements arrivals were disrupted, against 21.6% of 3,372 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
1.5% of 3,369 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
Air Canada appears from Jan 2018 to Jun 2026 with 23,087 arrivals.
The bounds describe the published record, not every commercial service. Final point is not necessarily a nonstop destination.
Archive route pairs: 29.
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?
30.0% of 3,369 movements over July 2025 to June 2026.
How often are they cancelled?
2.8% of 3,369 movements at short notice.
How late is late?
36.7–69.9 minutes; delayed denominator 915–1,656
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.