How often are these flights late or cancelled?
Icelandair
In the twelve months from July 2025 to June 2026, 14.6% of 1,960 movements arriving into the UK were disrupted — more than fifteen minutes late or cancelled at short notice.
Put the other way round, 85.4% of 1,960 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
14.6% of 1,960 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 |
|---|---|---|---|
| 14.6% of 1,960 movements | 1.5% of 1,960 movements | 19.5–65.7 minutes; delayed denominator 258–769 | 0.6% of 1,960 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?
0.6% of 1,960 movements passed the three-hour mark.
The ladder shows how many movements crossed each threshold. Cancellations are separate: 1.5% of 1,960 movements.
| Delay | Share and sample | One event per movements |
|---|---|---|
| More than 15 minutes | 13.2% of 1,960 movements | 7.6 |
| More than 30 minutes | 6.2% of 1,960 movements | 16.2 |
| More than 60 minutes | 2.4% of 1,960 movements | 40.8 |
| More than 120 minutes | 0.8% of 1,960 movements | 122.5 |
| More than 180 minutes | 0.6% of 1,960 movements | 178.2 |
| More than 360 minutes | 0.2% of 1,960 movements | 490.0 |
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?
0.8% of 1,960 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 2021, 3.9% of 77 movements. Worst month: Jun 2018, 65.2% of 141 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 | 41.0% of 139 movements |
| Feb 2018 | 29.0% of 131 movements |
| Mar 2018 | 27.8% of 158 movements |
| Apr 2018 | 24.2% of 153 movements |
| May 2018 | 34.8% of 141 movements |
| Jun 2018 | 65.2% of 141 movements |
| Jul 2018 | 55.5% of 146 movements |
| Aug 2018 | 41.5% of 147 movements |
| Sep 2018 | 24.7% of 158 movements |
| Oct 2018 | 28.0% of 164 movements |
| Nov 2018 | 30.5% of 154 movements |
| Dec 2018 | 23.6% of 148 movements |
| Jan 2019 | 13.0% of 154 movements |
| Feb 2019 | 17.4% of 138 movements |
| Mar 2019 | 15.2% of 151 movements |
| Apr 2019 | 33.5% of 155 movements |
| May 2019 | 30.6% of 144 movements |
| Jun 2019 | 40.4% of 136 movements |
| Jul 2019 | 31.2% of 138 movements |
| Aug 2019 | 30.9% of 136 movements |
| Sep 2019 | 25.0% of 136 movements |
| Oct 2019 | 25.5% of 161 movements |
| Nov 2019 | 9.0% of 144 movements |
| Dec 2019 | 13.6% of 140 movements |
| Jan 2020 | 29.7% of 148 movements |
| Feb 2020 | 32.4% of 139 movements |
| Mar 2020 | 27.5% of 109 movements |
| Apr 2020 | suppressed: fewer than twenty movements |
| May 2020 | suppressed: fewer than twenty movements |
| Jun 2020 | suppressed: fewer than twenty movements |
| Jul 2020 | suppressed: fewer than twenty movements |
| Aug 2020 | suppressed: fewer than twenty movements |
| Sep 2020 | suppressed: fewer than twenty movements |
| Oct 2020 | suppressed: fewer than twenty movements |
| Nov 2020 | suppressed: fewer than twenty movements |
| Dec 2020 | suppressed: fewer than twenty movements |
| Jan 2021 | suppressed: fewer than twenty movements |
| Feb 2021 | suppressed: fewer than twenty movements |
| Mar 2021 | suppressed: fewer than twenty movements |
| Apr 2021 | suppressed: fewer than twenty movements |
| May 2021 | suppressed: fewer than twenty movements |
| Jun 2021 | no events in 29 movements — small sample, not ranked |
| Jul 2021 | 7.1% of 42 movements — small sample, not ranked |
| Aug 2021 | 2.0% of 49 movements — small sample, not ranked |
| Sep 2021 | 3.9% of 77 movements |
| Oct 2021 | 11.7% of 77 movements |
| Nov 2021 | 6.2% of 64 movements |
| Dec 2021 | 13.8% of 58 movements |
| Jan 2022 | 12.7% of 55 movements |
| Feb 2022 | 15.5% of 58 movements |
| Mar 2022 | 19.0% of 79 movements |
| Apr 2022 | 8.7% of 126 movements |
| May 2022 | 19.3% of 119 movements |
| Jun 2022 | 38.2% of 131 movements |
| Jul 2022 | 40.1% of 142 movements |
| Aug 2022 | 33.6% of 137 movements |
| Sep 2022 | 25.0% of 128 movements |
| Oct 2022 | 21.5% of 144 movements |
| Nov 2022 | 14.4% of 132 movements |
| Dec 2022 | 37.6% of 125 movements |
| Jan 2023 | 23.9% of 134 movements |
| Feb 2023 | 23.7% of 131 movements |
| Mar 2023 | 13.6% of 140 movements |
| Apr 2023 | 20.3% of 143 movements |
| May 2023 | 20.1% of 134 movements |
| Jun 2023 | 43.9% of 132 movements |
| Jul 2023 | 31.2% of 138 movements |
| Aug 2023 | 23.4% of 137 movements |
| Sep 2023 | 29.5% of 139 movements |
| Oct 2023 | 24.2% of 157 movements |
| Nov 2023 | 7.9% of 151 movements |
| Dec 2023 | 27.1% of 140 movements |
| Jan 2024 | 11.5% of 131 movements |
| Feb 2024 | 13.3% of 128 movements |
| Mar 2024 | 6.8% of 133 movements |
| Apr 2024 | 12.0% of 142 movements |
| May 2024 | 19.7% of 137 movements |
| Jun 2024 | 13.4% of 134 movements |
| Jul 2024 | 24.6% of 138 movements |
| Aug 2024 | 21.5% of 135 movements |
| Sep 2024 | 17.4% of 138 movements |
| Oct 2024 | 21.8% of 156 movements |
| Nov 2024 | 14.0% of 150 movements |
| Dec 2024 | 37.8% of 143 movements |
| Jan 2025 | 28.9% of 149 movements |
| Feb 2025 | 22.0% of 132 movements |
| Mar 2025 | 12.6% of 151 movements |
| Apr 2025 | 7.2% of 152 movements |
| May 2025 | 20.2% of 163 movements |
| Jun 2025 | 7.8% of 154 movements |
| Jul 2025 | 17.4% of 161 movements |
| Aug 2025 | 18.1% of 160 movements |
| Sep 2025 | 11.8% of 153 movements |
| Oct 2025 | 17.2% of 174 movements |
| Nov 2025 | 9.0% of 167 movements |
| Dec 2025 | 18.8% of 160 movements |
| Jan 2026 | 12.3% of 163 movements |
| Feb 2026 | 7.2% of 152 movements |
| Mar 2026 | 20.5% of 171 movements |
| Apr 2026 | 18.3% of 164 movements |
| May 2026 | 10.7% of 169 movements |
| Jun 2026 | 13.9% of 166 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 | suppressed: fewer than twenty movements | no complete baseline | not enough data: needs a complete baseline and a publishable event month |
| Pandemic regime · Jun 2020 | Departures | suppressed: fewer than twenty movements | no complete baseline | not enough data: needs a complete baseline and a publishable event month |
| Summer 2022 breakdown · Jul 2022 | Arrivals | 40.1% of 142 movements | 13.2% across 935 flights | still above it 8 months later |
| Summer 2022 breakdown · Jul 2022 | Departures | 60.6% of 142 movements | 21.2% across 936 flights | returned after 4 months |
| NATS system failure · Aug 2023 | Arrivals | 23.4% of 137 movements | 25.7% across 1,618 flights | returned after 2 months |
| NATS system failure · Aug 2023 | Departures | 45.3% of 137 movements | 34.3% across 1,619 flights | returned the next month |
| Heathrow fire closure · Mar 2025 | Arrivals | 12.6% of 151 movements | 20.0% across 1,687 flights | returned the next month |
| Heathrow fire closure · Mar 2025 | Departures | 10.6% of 151 movements | 25.9% across 1,688 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: Jun, 38.2% across 7 months. Lowest median: Nov, 11.5% 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 | 13.0% | 11.5–41.0% | 7 months, 925 flights |
| Feb | 17.4% | 7.2–29.0% | 7 months, 870 flights |
| Mar | 15.2% | 6.8–27.8% | 7 months, 983 flights |
| Apr | 18.3% | 7.2–33.5% | 7 months, 1,035 flights |
| May | 20.1% | 10.7–34.8% | 7 months, 1,007 flights |
| Jun | 38.2% | 7.8–65.2% | 7 months, 994 flights |
| Jul | 31.2% | 17.4–55.5% | 6 months, 863 flights |
| Aug | 27.1% | 18.1–41.5% | 6 months, 852 flights |
| Sep | 24.8% | 11.8–29.5% | 6 months, 852 flights |
| Oct | 23.0% | 17.2–28.0% | 6 months, 956 flights |
| Nov | 11.5% | 7.9–30.5% | 6 months, 898 flights |
| Dec | 25.4% | 13.6–37.8% | 6 months, 856 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 ↔ KEFLAVIK, 12.3% of 724 movements. Highest disruption: GLA ↔ KEFLAVIK, 18.2% of 351 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 ↔ Keflavik | 12.3% of 724 movements | 1.1% of 724 movements | descriptive comparison |
| Manchester ↔ Keflavik | 13.3% of 300 movements | 1.0% of 300 movements | descriptive comparison |
| EDI ↔ KEFLAVIK | 15.6% of 147 movements | 2.0% of 147 movements | descriptive comparison |
| Gatwick ↔ Keflavik | 16.1% of 434 movements | 2.3% of 434 movements | descriptive comparison |
| GLA ↔ KEFLAVIK | 18.2% of 351 movements | 1.4% of 351 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 |
|---|---|---|
| Edinburgh | 15.5% of 148 movements | descriptive comparison |
| Glasgow | 18.2% of 351 movements | descriptive comparison |
| Gatwick | 16.1% of 434 movements | descriptive comparison |
| Heathrow | 12.4% of 725 movements | descriptive comparison |
| Manchester | 13.3% of 300 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
14.6% of 1,960 movements arrivals were disrupted, against 21.4% of 1,966 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
0.6% of 1,960 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
Icelandair appears from Jan 2018 to Jun 2026 with 12,026 arrivals.
The bounds describe the published record, not every commercial service. Final point is not necessarily a nonstop destination.
Archive route pairs: 44.
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?
14.6% of 1,960 movements over July 2025 to June 2026.
How often are they cancelled?
1.5% of 1,960 movements at short notice.
How late is late?
19.5–65.7 minutes; delayed denominator 258–769
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.