How often are these flights late or cancelled?
Swiss Airlines
In the twelve months from July 2025 to June 2026, 25.8% of 7,328 movements arriving into the UK were disrupted — more than fifteen minutes late or cancelled at short notice.
Put the other way round, 74.2% of 7,328 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
25.8% of 7,328 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 |
|---|---|---|---|
| 25.8% of 7,328 movements | 0.9% of 7,328 movements | 17.5–46.7 minutes; delayed denominator 1,827–4,466 | 0.0% of 7,328 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?
0.0% of 7,328 movements passed the three-hour mark.
The ladder shows how many movements crossed each threshold. Cancellations are separate: 0.9% of 7,328 movements.
| Delay | Share and sample | One event per movements |
|---|---|---|
| More than 15 minutes | 24.9% of 7,328 movements | 4.0 |
| More than 30 minutes | 10.6% of 7,328 movements | 9.4 |
| More than 60 minutes | 2.7% of 7,328 movements | 36.8 |
| More than 120 minutes | 0.3% of 7,328 movements | 385.7 |
| More than 180 minutes | 0.0% of 7,328 movements | 2,442.7 |
| More than 360 minutes | no events in 7,328 movements | No observed events; this is not zero risk. |
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?
0.3% of 7,328 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: Jun 2020, 1.6% of 64 movements. Worst month: Jul 2024, 48.9% of 599 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 | 26.1% of 739 movements |
| Feb 2018 | 27.0% of 679 movements |
| Mar 2018 | 24.3% of 720 movements |
| Apr 2018 | 27.4% of 678 movements |
| May 2018 | 22.5% of 703 movements |
| Jun 2018 | 28.3% of 660 movements |
| Jul 2018 | 29.4% of 664 movements |
| Aug 2018 | 26.9% of 661 movements |
| Sep 2018 | 22.4% of 665 movements |
| Oct 2018 | 22.0% of 705 movements |
| Nov 2018 | 24.3% of 494 movements |
| Dec 2018 | 36.1% of 487 movements |
| Jan 2019 | 20.2% of 737 movements |
| Feb 2019 | 22.3% of 681 movements |
| Mar 2019 | 27.3% of 728 movements |
| Apr 2019 | 22.4% of 653 movements |
| May 2019 | 20.5% of 473 movements |
| Jun 2019 | 33.2% of 467 movements |
| Jul 2019 | 33.3% of 493 movements |
| Aug 2019 | 30.5% of 489 movements |
| Sep 2019 | 29.4% of 472 movements |
| Oct 2019 | 29.5% of 495 movements |
| Nov 2019 | 11.5% of 480 movements |
| Dec 2019 | 25.3% of 494 movements |
| Jan 2020 | 17.9% of 730 movements |
| Feb 2020 | 36.1% of 700 movements |
| Mar 2020 | 14.0% of 420 movements |
| Apr 2020 | 2.5% of 40 movements — small sample, not ranked |
| May 2020 | 7.5% of 40 movements — small sample, not ranked |
| Jun 2020 | 1.6% of 64 movements |
| Jul 2020 | 5.0% of 141 movements |
| Aug 2020 | 3.4% of 175 movements |
| Sep 2020 | 1.8% of 109 movements |
| Oct 2020 | 5.2% of 58 movements |
| Nov 2020 | 12.0% of 50 movements |
| Dec 2020 | 23.5% of 85 movements |
| Jan 2021 | 22.2% of 72 movements |
| Feb 2021 | 29.4% of 34 movements — small sample, not ranked |
| Mar 2021 | 13.3% of 45 movements — small sample, not ranked |
| Apr 2021 | 25.6% of 78 movements |
| May 2021 | 11.6% of 86 movements |
| Jun 2021 | 6.0% of 100 movements |
| Jul 2021 | 21.9% of 137 movements |
| Aug 2021 | 29.7% of 185 movements |
| Sep 2021 | 17.2% of 244 movements |
| Oct 2021 | 10.1% of 317 movements |
| Nov 2021 | 8.9% of 280 movements |
| Dec 2021 | 13.8% of 341 movements |
| Jan 2022 | 18.6% of 338 movements |
| Feb 2022 | 31.0% of 336 movements |
| Mar 2022 | 14.9% of 404 movements |
| Apr 2022 | 22.8% of 531 movements |
| May 2022 | 20.3% of 528 movements |
| Jun 2022 | 31.9% of 480 movements |
| Jul 2022 | 28.5% of 460 movements |
| Aug 2022 | 21.7% of 508 movements |
| Sep 2022 | 37.5% of 544 movements |
| Oct 2022 | 20.5% of 547 movements |
| Nov 2022 | 12.4% of 588 movements |
| Dec 2022 | 36.4% of 618 movements |
| Jan 2023 | 23.6% of 609 movements |
| Feb 2023 | 18.6% of 591 movements |
| Mar 2023 | 35.5% of 659 movements |
| Apr 2023 | 32.1% of 613 movements |
| May 2023 | 23.7% of 646 movements |
| Jun 2023 | 33.4% of 622 movements |
| Jul 2023 | 43.4% of 613 movements |
| Aug 2023 | 38.7% of 628 movements |
| Sep 2023 | 38.6% of 622 movements |
| Oct 2023 | 30.9% of 641 movements |
| Nov 2023 | 24.2% of 596 movements |
| Dec 2023 | 47.6% of 632 movements |
| Jan 2024 | 26.7% of 603 movements |
| Feb 2024 | 22.1% of 611 movements |
| Mar 2024 | 20.1% of 661 movements |
| Apr 2024 | 38.7% of 592 movements |
| May 2024 | 30.2% of 612 movements |
| Jun 2024 | 39.7% of 584 movements |
| Jul 2024 | 48.9% of 599 movements |
| Aug 2024 | 42.7% of 586 movements |
| Sep 2024 | 46.9% of 588 movements |
| Oct 2024 | 30.9% of 615 movements |
| Nov 2024 | 19.8% of 597 movements |
| Dec 2024 | 35.7% of 596 movements |
| Jan 2025 | 29.2% of 593 movements |
| Feb 2025 | 14.2% of 571 movements |
| Mar 2025 | 16.3% of 637 movements |
| Apr 2025 | 23.4% of 591 movements |
| May 2025 | 25.5% of 609 movements |
| Jun 2025 | 33.5% of 600 movements |
| Jul 2025 | 40.6% of 614 movements |
| Aug 2025 | 28.5% of 601 movements |
| Sep 2025 | 36.7% of 589 movements |
| Oct 2025 | 27.3% of 616 movements |
| Nov 2025 | 11.4% of 577 movements |
| Dec 2025 | 16.4% of 596 movements |
| Jan 2026 | 27.1% of 580 movements |
| Feb 2026 | 16.4% of 556 movements |
| Mar 2026 | 17.9% of 630 movements |
| Apr 2026 | 23.1% of 657 movements |
| May 2026 | 24.6% of 666 movements |
| Jun 2026 | 38.4% of 646 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 | 1.6% of 64 movements | 22.6% across 5,320 flights | returned the next month |
| Pandemic regime · Jun 2020 | Departures | 6.2% of 64 movements | 32.6% across 5,336 flights | returned the next month |
| Summer 2022 breakdown · Jul 2022 | Arrivals | 28.5% of 460 movements | 20.1% across 4,121 flights | returned after 4 months |
| Summer 2022 breakdown · Jul 2022 | Departures | 65.6% of 459 movements | 33.7% across 4,119 flights | returned after 4 months |
| NATS system failure · Aug 2023 | Arrivals | 38.7% of 628 movements | 28.2% across 7,158 flights | returned after 3 months |
| NATS system failure · Aug 2023 | Departures | 64.0% of 631 movements | 48.5% across 7,153 flights | returned after 2 months |
| Heathrow fire closure · Mar 2025 | Arrivals | 16.3% of 637 movements | 33.1% across 7,194 flights | returned the next month |
| Heathrow fire closure · Mar 2025 | Departures | 29.1% of 636 movements | 46.4% across 7,196 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, 37.1% across 6 months. Lowest median: Nov, 16.1% 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 | 26.1% | 18.6–29.2% | 7 months, 4,199 flights |
| Feb | 22.1% | 14.2–31.0% | 7 months, 4,025 flights |
| Mar | 20.1% | 14.9–35.5% | 7 months, 4,439 flights |
| Apr | 23.4% | 22.4–38.7% | 7 months, 4,315 flights |
| May | 23.7% | 20.3–30.2% | 7 months, 4,237 flights |
| Jun | 33.4% | 28.3–39.7% | 7 months, 4,059 flights |
| Jul | 36.9% | 28.5–48.9% | 6 months, 3,443 flights |
| Aug | 29.5% | 21.7–42.7% | 6 months, 3,473 flights |
| Sep | 37.1% | 22.4–46.9% | 6 months, 3,480 flights |
| Oct | 28.4% | 20.5–30.9% | 6 months, 3,619 flights |
| Nov | 16.1% | 11.4–24.3% | 6 months, 3,332 flights |
| Dec | 35.9% | 16.4–47.6% | 6 months, 3,423 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 ↔ GENEVA, 20.3% of 59 movements. Highest disruption: BHX ↔ ZURICH, 41.7% of 408 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 |
|---|---|---|---|
| Gatwick ↔ Geneva | 20.3% of 59 movements | no events in 59 movements | descriptive comparison |
| London City ↔ Zurich | 20.5% of 1,185 movements | 1.7% of 1,185 movements | descriptive comparison |
| Heathrow ↔ Zurich | 22.1% of 2,556 movements | 0.7% of 2,556 movements | descriptive comparison |
| Heathrow ↔ Geneva | 24.8% of 1,794 movements | 1.2% of 1,794 movements | descriptive comparison |
| Gatwick ↔ Zurich | 33.2% of 458 movements | 0.7% of 458 movements | descriptive comparison |
| Manchester ↔ Zurich | 35.1% of 865 movements | 0.1% of 865 movements | descriptive comparison |
| BHX ↔ ZURICH | 41.7% of 408 movements | 1.0% of 408 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?
5 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 |
|---|---|---|
| Birmingham | 41.7% of 408 movements | descriptive comparison |
| London City | 20.5% of 1,185 movements | descriptive comparison |
| Gatwick | 31.7% of 517 movements | descriptive comparison |
| Heathrow | 23.2% of 4,350 movements | descriptive comparison |
| Manchester | 35.1% of 865 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
25.8% of 7,328 movements arrivals were disrupted, against 40.8% of 7,331 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
0.0% of 7,328 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
Swiss Airlines appears from Jan 2018 to Jun 2026 with 50,575 arrivals.
The bounds describe the published record, not every commercial service. Final point is not necessarily a nonstop destination.
Archive route pairs: 31.
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?
25.8% of 7,328 movements over July 2025 to June 2026.
How often are they cancelled?
0.9% of 7,328 movements at short notice.
How late is late?
17.5–46.7 minutes; delayed denominator 1,827–4,466
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.