How often are these flights late or cancelled?
KLM Cityhopper
In the twelve months from July 2025 to June 2026, 20.0% of 3,073 movements arriving into the UK were disrupted — more than fifteen minutes late or cancelled at short notice.
Put the other way round, 80.0% of 3,073 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
20.0% of 3,073 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 |
|---|---|---|---|
| 20.0% of 3,073 movements | 0.5% of 3,073 movements | 16.2–53.5 minutes; delayed denominator 602–1,803 | 0.0% of 3,073 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 3,073 movements passed the three-hour mark.
The ladder shows how many movements crossed each threshold. Cancellations are separate: 0.5% of 3,073 movements.
| Delay | Share and sample | One event per movements |
|---|---|---|
| More than 15 minutes | 19.6% of 3,073 movements | 5.1 |
| More than 30 minutes | 9.1% of 3,073 movements | 11.0 |
| More than 60 minutes | 3.4% of 3,073 movements | 29.8 |
| More than 120 minutes | 0.4% of 3,073 movements | 236.4 |
| More than 180 minutes | 0.0% of 3,073 movements | 3,073.0 |
| More than 360 minutes | no events in 3,073 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 3,073 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 2021, no events in 104 movements. Worst month: Sep 2022, 42.1% of 140 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 | 9.8% of 112 movements |
| Feb 2018 | 12.6% of 103 movements |
| Mar 2018 | 10.4% of 154 movements |
| Apr 2018 | 8.8% of 125 movements |
| May 2018 | 11.5% of 130 movements |
| Jun 2018 | 12.4% of 121 movements |
| Jul 2018 | 14.5% of 145 movements |
| Aug 2018 | 4.5% of 133 movements |
| Sep 2018 | 16.4% of 189 movements |
| Oct 2018 | 9.9% of 162 movements |
| Nov 2018 | 5.5% of 128 movements |
| Dec 2018 | 8.3% of 120 movements |
| Jan 2019 | 4.7% of 107 movements |
| Feb 2019 | 10.9% of 110 movements |
| Mar 2019 | 17.4% of 132 movements |
| Apr 2019 | 6.7% of 60 movements |
| May 2019 | 15.3% of 85 movements |
| Jun 2019 | 11.1% of 90 movements |
| Jul 2019 | 14.4% of 97 movements |
| Aug 2019 | 6.2% of 97 movements |
| Sep 2019 | 30.2% of 96 movements |
| Oct 2019 | 20.8% of 106 movements |
| Nov 2019 | 5.1% of 118 movements |
| Dec 2019 | 9.6% of 114 movements |
| Jan 2020 | 11.4% of 35 movements — small sample, not ranked |
| Feb 2020 | 13.2% of 91 movements |
| Mar 2020 | suppressed: fewer than twenty movements |
| Apr 2020 | 2.1% of 47 movements — small sample, not ranked |
| May 2020 | 3.2% of 31 movements — small sample, not ranked |
| Jun 2020 | 5.0% of 60 movements |
| Jul 2020 | suppressed: fewer than twenty movements |
| Aug 2020 | 3.4% of 175 movements |
| Sep 2020 | 2.1% of 193 movements |
| Oct 2020 | 1.0% of 201 movements |
| Nov 2020 | 1.7% of 121 movements |
| Dec 2020 | 5.6% of 90 movements |
| Jan 2021 | 9.8% of 82 movements |
| Feb 2021 | suppressed: fewer than twenty movements |
| Mar 2021 | 18.2% of 22 movements — small sample, not ranked |
| Apr 2021 | 6.2% of 80 movements |
| May 2021 | no events in 104 movements |
| Jun 2021 | 7.5% of 120 movements |
| Jul 2021 | 6.0% of 182 movements |
| Aug 2021 | 19.5% of 169 movements |
| Sep 2021 | 13.3% of 165 movements |
| Oct 2021 | 18.0% of 178 movements |
| Nov 2021 | 12.8% of 164 movements |
| Dec 2021 | 15.0% of 160 movements |
| Jan 2022 | 17.3% of 104 movements |
| Feb 2022 | 21.6% of 88 movements |
| Mar 2022 | 12.9% of 140 movements |
| Apr 2022 | 40.5% of 163 movements |
| May 2022 | 41.7% of 163 movements |
| Jun 2022 | 35.6% of 160 movements |
| Jul 2022 | 34.0% of 191 movements |
| Aug 2022 | 19.0% of 189 movements |
| Sep 2022 | 42.1% of 140 movements |
| Oct 2022 | 23.2% of 142 movements |
| Nov 2022 | 8.8% of 159 movements |
| Dec 2022 | 23.3% of 159 movements |
| Jan 2023 | 9.0% of 166 movements |
| Feb 2023 | 4.8% of 165 movements |
| Mar 2023 | 18.8% of 208 movements |
| Apr 2023 | 12.6% of 198 movements |
| May 2023 | 17.4% of 195 movements |
| Jun 2023 | 22.0% of 200 movements |
| Jul 2023 | 20.6% of 165 movements |
| Aug 2023 | 20.4% of 191 movements |
| Sep 2023 | 20.6% of 262 movements |
| Oct 2023 | 26.8% of 257 movements |
| Nov 2023 | 24.7% of 182 movements |
| Dec 2023 | 30.5% of 177 movements |
| Jan 2024 | 23.8% of 210 movements |
| Feb 2024 | 19.4% of 201 movements |
| Mar 2024 | 16.1% of 193 movements |
| Apr 2024 | 27.6% of 286 movements |
| May 2024 | 18.4% of 299 movements |
| Jun 2024 | 21.4% of 285 movements |
| Jul 2024 | 20.6% of 218 movements |
| Aug 2024 | 15.0% of 240 movements |
| Sep 2024 | 27.4% of 270 movements |
| Oct 2024 | 24.7% of 251 movements |
| Nov 2024 | 26.2% of 214 movements |
| Dec 2024 | 24.2% of 215 movements |
| Jan 2025 | 33.7% of 175 movements |
| Feb 2025 | 22.0% of 182 movements |
| Mar 2025 | 26.4% of 227 movements |
| Apr 2025 | 11.8% of 220 movements |
| May 2025 | 17.1% of 258 movements |
| Jun 2025 | 18.8% of 256 movements |
| Jul 2025 | 32.0% of 278 movements |
| Aug 2025 | 25.8% of 283 movements |
| Sep 2025 | 31.2% of 247 movements |
| Oct 2025 | 26.6% of 256 movements |
| Nov 2025 | 13.4% of 247 movements |
| Dec 2025 | 12.9% of 249 movements |
| Jan 2026 | 29.3% of 188 movements |
| Feb 2026 | 10.6% of 198 movements |
| Mar 2026 | 13.7% of 262 movements |
| Apr 2026 | 11.5% of 286 movements |
| May 2026 | 15.0% of 294 movements |
| Jun 2026 | 19.3% of 285 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 | 5.0% of 60 movements | no complete baseline | not enough data: needs a complete baseline and a publishable event month |
| Pandemic regime · Jun 2020 | Departures | 8.3% of 60 movements | no complete baseline | not enough data: needs a complete baseline and a publishable event month |
| Summer 2022 breakdown · Jul 2022 | Arrivals | 34.0% of 191 movements | 21.2% across 1,836 flights | returned the next month |
| Summer 2022 breakdown · Jul 2022 | Departures | 40.7% of 189 movements | 27.0% across 1,822 flights | returned the next month |
| NATS system failure · Aug 2023 | Arrivals | 20.4% of 191 movements | 18.5% across 2,086 flights | returned after 7 months |
| NATS system failure · Aug 2023 | Departures | 28.0% of 189 movements | 26.6% across 2,089 flights | returned the next month |
| Heathrow fire closure · Mar 2025 | Arrivals | 26.4% of 227 movements | 23.1% across 2,828 flights | returned the next month |
| Heathrow fire closure · Mar 2025 | Departures | 29.4% of 228 movements | 30.9% across 2,804 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, 28.8% across 6 months. Lowest median: Nov, 11.1% 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 | 17.3% | 4.7–33.7% | 7 months, 1,062 flights |
| Feb | 12.6% | 4.8–22.0% | 7 months, 1,047 flights |
| Mar | 16.1% | 10.4–26.4% | 7 months, 1,316 flights |
| Apr | 11.8% | 6.7–40.5% | 7 months, 1,338 flights |
| May | 17.1% | 11.5–41.7% | 7 months, 1,424 flights |
| Jun | 19.3% | 11.1–35.6% | 7 months, 1,397 flights |
| Jul | 20.6% | 14.4–34.0% | 6 months, 1,094 flights |
| Aug | 17.0% | 4.5–25.8% | 6 months, 1,133 flights |
| Sep | 28.8% | 16.4–42.1% | 6 months, 1,204 flights |
| Oct | 24.0% | 9.9–26.8% | 6 months, 1,174 flights |
| Nov | 11.1% | 5.1–26.2% | 6 months, 1,048 flights |
| Dec | 18.1% | 8.3–30.5% | 6 months, 1,034 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: BHD ↔ AMS, 18.9% of 661 movements. Highest disruption: SOU ↔ AMS, 20.7% of 686 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 |
|---|---|---|---|
| Belfast City (George Best) ↔ Amsterdam | 18.9% of 661 movements | 2.1% of 661 movements | descriptive comparison |
| Aberdeen ↔ Amsterdam | 20.2% of 1,347 movements | no events in 1,347 movements | descriptive comparison |
| Glasgow ↔ Amsterdam | 20.3% of 374 movements | no events in 374 movements | descriptive comparison |
| Southampton ↔ Amsterdam | 20.7% of 686 movements | no events in 686 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?
4 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 | 20.2% of 1,347 movements | descriptive comparison |
| Belfast City (George Best) | 19.0% of 662 movements | descriptive comparison |
| Glasgow | 20.3% of 374 movements | descriptive comparison |
| Southampton | 20.7% of 686 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
20.0% of 3,073 movements arrivals were disrupted, against 25.9% of 3,057 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 3,073 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
KLM Cityhopper appears from Jan 2018 to Jun 2026 with 16,748 arrivals.
The bounds describe the published record, not every commercial service. Final point is not necessarily a nonstop destination.
Archive route pairs: 17.
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?
20.0% of 3,073 movements over July 2025 to June 2026.
How often are they cancelled?
0.5% of 3,073 movements at short notice.
How late is late?
16.2–53.5 minutes; delayed denominator 602–1,803
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.