How often are these flights late or cancelled?
Finnair
In the twelve months from July 2025 to June 2026, 23.7% of 2,671 movements arriving into the UK were disrupted — more than fifteen minutes late or cancelled at short notice.
Put the other way round, 76.3% of 2,671 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
23.7% of 2,671 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 |
|---|---|---|---|
| 23.7% of 2,671 movements | 2.0% of 2,671 movements | 17.4–47.5 minutes; delayed denominator 580–1,429 | 0.0% of 2,671 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 2,671 movements passed the three-hour mark.
The ladder shows how many movements crossed each threshold. Cancellations are separate: 2.0% of 2,671 movements.
| Delay | Share and sample | One event per movements |
|---|---|---|
| More than 15 minutes | 21.7% of 2,671 movements | 4.6 |
| More than 30 minutes | 8.9% of 2,671 movements | 11.3 |
| More than 60 minutes | 2.5% of 2,671 movements | 40.5 |
| More than 120 minutes | 0.4% of 2,671 movements | 242.8 |
| More than 180 minutes | 0.0% of 2,671 movements | 2,671.0 |
| More than 360 minutes | no events in 2,671 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?
0.4% of 2,671 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, no events in 62 movements. Worst month: Dec 2023, 56.6% of 182 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 | 41.2% of 233 movements |
| Feb 2018 | 23.2% of 207 movements |
| Mar 2018 | 17.5% of 229 movements |
| Apr 2018 | 34.5% of 229 movements |
| May 2018 | 8.9% of 248 movements |
| Jun 2018 | 19.8% of 243 movements |
| Jul 2018 | 18.2% of 258 movements |
| Aug 2018 | 23.9% of 251 movements |
| Sep 2018 | 30.8% of 240 movements |
| Oct 2018 | 27.5% of 244 movements |
| Nov 2018 | 15.4% of 221 movements |
| Dec 2018 | 44.2% of 233 movements |
| Jan 2019 | 29.7% of 239 movements |
| Feb 2019 | 27.0% of 215 movements |
| Mar 2019 | 29.3% of 239 movements |
| Apr 2019 | 20.6% of 257 movements |
| May 2019 | 16.1% of 279 movements |
| Jun 2019 | 40.4% of 272 movements |
| Jul 2019 | 18.0% of 289 movements |
| Aug 2019 | 27.5% of 280 movements |
| Sep 2019 | 25.3% of 269 movements |
| Oct 2019 | 30.3% of 271 movements |
| Nov 2019 | 11.9% of 261 movements |
| Dec 2019 | 26.8% of 269 movements |
| Jan 2020 | 27.0% of 274 movements |
| Feb 2020 | 37.8% of 254 movements |
| Mar 2020 | 10.4% of 182 movements |
| Apr 2020 | 3.3% of 60 movements |
| May 2020 | no events in 62 movements |
| Jun 2020 | 3.3% of 60 movements |
| Jul 2020 | 1.4% of 71 movements |
| Aug 2020 | 1.0% of 98 movements |
| Sep 2020 | 8.2% of 73 movements |
| Oct 2020 | 2.5% of 79 movements |
| Nov 2020 | 6.8% of 74 movements |
| Dec 2020 | 13.8% of 58 movements |
| Jan 2021 | 23.3% of 43 movements — small sample, not ranked |
| Feb 2021 | 39.5% of 43 movements — small sample, not ranked |
| Mar 2021 | 4.5% of 66 movements |
| Apr 2021 | 8.7% of 69 movements |
| May 2021 | 5.0% of 80 movements |
| Jun 2021 | 9.1% of 77 movements |
| Jul 2021 | 5.6% of 90 movements |
| Aug 2021 | 7.7% of 91 movements |
| Sep 2021 | 14.1% of 99 movements |
| Oct 2021 | 20.3% of 128 movements |
| Nov 2021 | 19.4% of 124 movements |
| Dec 2021 | 55.1% of 147 movements |
| Jan 2022 | 48.9% of 135 movements |
| Feb 2022 | 37.6% of 101 movements |
| Mar 2022 | 9.9% of 142 movements |
| Apr 2022 | 12.2% of 180 movements |
| May 2022 | 12.4% of 186 movements |
| Jun 2022 | 24.9% of 177 movements |
| Jul 2022 | 14.7% of 184 movements |
| Aug 2022 | 13.7% of 183 movements |
| Sep 2022 | 16.5% of 176 movements |
| Oct 2022 | 19.8% of 187 movements |
| Nov 2022 | 10.8% of 166 movements |
| Dec 2022 | 41.3% of 172 movements |
| Jan 2023 | 27.4% of 179 movements |
| Feb 2023 | 20.8% of 159 movements |
| Mar 2023 | 16.3% of 178 movements |
| Apr 2023 | 9.0% of 177 movements |
| May 2023 | 7.1% of 183 movements |
| Jun 2023 | 17.5% of 177 movements |
| Jul 2023 | 18.6% of 183 movements |
| Aug 2023 | 14.7% of 184 movements |
| Sep 2023 | 33.1% of 175 movements |
| Oct 2023 | 26.8% of 179 movements |
| Nov 2023 | 19.3% of 176 movements |
| Dec 2023 | 56.6% of 182 movements |
| Jan 2024 | 44.2% of 181 movements |
| Feb 2024 | 46.7% of 165 movements |
| Mar 2024 | 22.3% of 179 movements |
| Apr 2024 | 35.5% of 203 movements |
| May 2024 | 21.6% of 204 movements |
| Jun 2024 | 23.0% of 191 movements |
| Jul 2024 | 26.4% of 208 movements |
| Aug 2024 | 34.8% of 207 movements |
| Sep 2024 | 31.3% of 201 movements |
| Oct 2024 | 26.8% of 205 movements |
| Nov 2024 | 33.5% of 260 movements |
| Dec 2024 | 51.0% of 257 movements |
| Jan 2025 | 46.4% of 278 movements |
| Feb 2025 | 24.1% of 249 movements |
| Mar 2025 | 23.8% of 273 movements |
| Apr 2025 | 16.9% of 260 movements |
| May 2025 | 20.6% of 267 movements |
| Jun 2025 | 25.4% of 256 movements |
| Jul 2025 | 17.5% of 268 movements |
| Aug 2025 | 19.3% of 269 movements |
| Sep 2025 | 25.3% of 253 movements |
| Oct 2025 | 22.4% of 246 movements |
| Nov 2025 | 21.0% of 205 movements |
| Dec 2025 | 34.3% of 210 movements |
| Jan 2026 | 39.3% of 211 movements |
| Feb 2026 | 41.6% of 185 movements |
| Mar 2026 | 12.9% of 217 movements |
| Apr 2026 | 9.0% of 200 movements |
| May 2026 | 17.2% of 209 movements |
| Jun 2026 | 29.8% of 198 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 | 3.3% of 60 movements | 21.6% across 2,743 flights | returned the next month |
| Pandemic regime · Jun 2020 | Departures | 5.0% of 60 movements | 21.2% across 2,744 flights | returned the next month |
| Summer 2022 breakdown · Jul 2022 | Arrivals | 14.7% of 184 movements | 22.3% across 1,600 flights | returned the next month |
| Summer 2022 breakdown · Jul 2022 | Departures | 48.4% of 184 movements | 26.2% across 1,600 flights | returned after 4 months |
| NATS system failure · Aug 2023 | Arrivals | 14.7% of 184 movements | 18.2% across 2,120 flights | still above it 8 months later |
| NATS system failure · Aug 2023 | Departures | 31.0% of 184 movements | 32.1% across 2,115 flights | returned after 2 months |
| Heathrow fire closure · Mar 2025 | Arrivals | 23.8% of 273 movements | 31.4% across 2,642 flights | returned the next month |
| Heathrow fire closure · Mar 2025 | Departures | 26.5% of 272 movements | 33.0% across 2,640 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, 42.7% across 6 months. Lowest median: May, 16.1% 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 | 41.2% | 27.4–48.9% | 7 months, 1,456 flights |
| Feb | 27.0% | 20.8–46.7% | 7 months, 1,281 flights |
| Mar | 17.5% | 9.9–29.3% | 7 months, 1,457 flights |
| Apr | 16.9% | 9.0–35.5% | 7 months, 1,506 flights |
| May | 16.1% | 7.1–21.6% | 7 months, 1,576 flights |
| Jun | 24.9% | 17.5–40.4% | 7 months, 1,514 flights |
| Jul | 18.1% | 14.7–26.4% | 6 months, 1,390 flights |
| Aug | 21.6% | 13.7–34.8% | 6 months, 1,374 flights |
| Sep | 28.1% | 16.5–33.1% | 6 months, 1,314 flights |
| Oct | 26.8% | 19.8–30.3% | 6 months, 1,332 flights |
| Nov | 17.4% | 10.8–33.5% | 6 months, 1,289 flights |
| Dec | 42.7% | 26.8–56.6% | 6 months, 1,323 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: EDI ↔ HELSINKI, 20.5% of 351 movements. Highest disruption: LHR ↔ HELSINKI, 24.7% of 1,693 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 |
|---|---|---|---|
| EDI ↔ HELSINKI | 20.5% of 351 movements | 1.4% of 351 movements | descriptive comparison |
| Manchester ↔ Helsinki | 22.8% of 626 movements | 1.0% of 626 movements | descriptive comparison |
| Heathrow ↔ Helsinki | 24.7% of 1,693 movements | 2.5% of 1,693 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?
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 | 20.5% of 351 movements | descriptive comparison |
| Heathrow | 24.7% of 1,694 movements | descriptive comparison |
| Manchester | 22.8% of 626 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
23.7% of 2,671 movements arrivals were disrupted, against 29.7% of 2,669 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 2,671 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
Finnair appears from Jan 2018 to Jun 2026 with 19,214 arrivals.
The bounds describe the published record, not every commercial service. Final point is not necessarily a nonstop destination.
Archive route pairs: 13.
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?
23.7% of 2,671 movements over July 2025 to June 2026.
How often are they cancelled?
2.0% of 2,671 movements at short notice.
How late is late?
17.4–47.5 minutes; delayed denominator 580–1,429
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.