UK FLIGHT DELAY INDEX

derived from CAA punctuality statistics for UK reporting airports

How often are these flights late or cancelled?

Easyjet Switzerland

In the twelve months from July 2025 to June 2026, 25.8% of 1,038 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 1,038 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 1,038 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.

DisruptionShort-notice cancellationsDelay among delayed movementsOver three hours
25.8% of 1,038 movements4.0% of 1,038 movements23.0–52.8 minutes; delayed denominator 226–4750.1% of 1,038 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?

0.1% of 1,038 movements passed the three-hour mark.

The ladder shows how many movements crossed each threshold. Cancellations are separate: 4.0% of 1,038 movements.

DelayShare and sampleOne event per movements
More than 15 minutes21.8% of 1,038 movements4.6
More than 30 minutes12.2% of 1,038 movements8.2
More than 60 minutes4.5% of 1,038 movements22.1
More than 120 minutes0.6% of 1,038 movements173.0
More than 180 minutes0.1% of 1,038 movements1,038.0
More than 360 minutesno events in 1,038 movementsNo 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?

0.6% of 1,038 movements passed two hours.

The histogram shows the published delay bands. Bucket shares use all reported operations, including unmatched records; cancellations are reported separately.

Nine delay buckets, minutes; share of all recorded operations>15 early12011.6%15–1 early40138.6%0–15 late24924.0%16–30999.5%31–60807.7%61…120413.9%121…18050.5%181…36010.1%>36000.0%D=1,038
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: Jan 2019, 7.7% of 52 movements. Worst month: Dec 2024, 42.7% of 131 movements.

The line traces every month. Lower disruption is better; gaps are never zeros. Pandemic readings describe a different operating regime.

Monthly disruption share; gaps mean no published dataJan 2018: 12.7%; sample: 552018Feb 2018: 17.5%; sample: 229Mar 2018: 23.9%; sample: 71Apr 2018: 17.4%; sample: 195May 2018: 17.5%; sample: 40Jun 2018: 23.3%; sample: 43Jul 2018: 19.5%; sample: 41Aug 2018: 17.5%; sample: 40Sep 2018: 12.5%; sample: 40Oct 2018: 24.4%; sample: 41Nov 2018: suppressed: fewer than twenty movements×Dec 2018: 39.5%; sample: 43Jan 2019: 7.7%; sample: 522019Feb 2019: 29.2%; sample: 48Mar 2019: 20.7%; sample: 58Apr 2019: 5.1%; sample: 39May 2019: 4.9%; sample: 41Jun 2019: 10.3%; sample: 39Jul 2019: 20.9%; sample: 43Aug 2019: 10.5%; sample: 38Sep 2019: 15.0%; sample: 40Oct 2019: 5.3%; sample: 38Nov 2019: 0.0%; sample: 26Dec 2019: 23.0%; sample: 61Jan 2020: 14.7%; sample: 682020Feb 2020: 27.5%; sample: 80Mar 2020: 41.4%; sample: 58Apr 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×2021Feb 2021: suppressed: fewer than twenty movements×Mar 2021: suppressed: fewer than twenty movements×Apr 2021: suppressed: fewer than twenty movements×May 2021: no data×Jun 2021: no data×Jul 2021: suppressed: fewer than twenty movements×Aug 2021: suppressed: fewer than twenty movements×Sep 2021: suppressed: fewer than twenty movements×Oct 2021: suppressed: fewer than twenty movements×Nov 2021: suppressed: fewer than twenty movements×Dec 2021: 14.3%; sample: 35Jan 2022: 16.7%; sample: 302022Feb 2022: 28.0%; sample: 50Mar 2022: 17.9%; sample: 67Apr 2022: 14.3%; sample: 35May 2022: 30.3%; sample: 33Jun 2022: 33.3%; sample: 36Jul 2022: 15.6%; sample: 32Aug 2022: 14.7%; sample: 34Sep 2022: 33.3%; sample: 33Oct 2022: 20.6%; sample: 34Nov 2022: suppressed: fewer than twenty movements×Dec 2022: 25.7%; sample: 70Jan 2023: 20.3%; sample: 692023Feb 2023: 11.7%; sample: 94Mar 2023: 34.1%; sample: 129Apr 2023: 30.3%; sample: 33May 2023: 36.4%; sample: 33Jun 2023: 51.2%; sample: 43Jul 2023: 45.0%; sample: 40Aug 2023: 48.8%; sample: 43Sep 2023: 29.3%; sample: 41Oct 2023: 42.5%; sample: 40Nov 2023: suppressed: fewer than twenty movements×Dec 2023: 28.2%; sample: 110Jan 2024: 20.8%; sample: 1442024Feb 2024: 22.4%; sample: 183Mar 2024: 18.8%; sample: 160Apr 2024: 21.0%; sample: 124May 2024: 19.2%; sample: 73Jun 2024: 35.7%; sample: 70Jul 2024: 41.7%; sample: 60Aug 2024: 20.8%; sample: 53Sep 2024: 26.2%; sample: 65Oct 2024: 25.0%; sample: 64Nov 2024: 3.2%; sample: 31Dec 2024: 42.7%; sample: 131Jan 2025: 36.4%; sample: 1512025Feb 2025: 25.0%; sample: 172Mar 2025: 13.2%; sample: 182Apr 2025: 17.5%; sample: 103May 2025: 24.6%; sample: 61Jun 2025: 22.8%; sample: 57Jul 2025: 30.2%; sample: 63Aug 2025: 16.9%; sample: 59Sep 2025: 31.6%; sample: 57Oct 2025: 28.8%; sample: 52Nov 2025: 20.8%; sample: 24Dec 2025: 26.8%; sample: 127Jan 2026: 31.1%; sample: 1512026Feb 2026: 23.9%; sample: 142Mar 2026: 16.6%; sample: 157Apr 2026: 31.7%; sample: 82May 2026: 18.0%; sample: 61Jun 2026: 36.5%; sample: 63Pandemic regime Jun 2020Summer 2022 breakdown Jul 2022NATS system failure Aug 2023Heathrow fire closure Mar 2025100%0%
Every monthly observation
MonthDisruption on arrivals
Jan 201812.7% of 55 movements
Feb 201817.5% of 229 movements
Mar 201823.9% of 71 movements
Apr 201817.4% of 195 movements
May 201817.5% of 40 movements — small sample, not ranked
Jun 201823.3% of 43 movements — small sample, not ranked
Jul 201819.5% of 41 movements — small sample, not ranked
Aug 201817.5% of 40 movements — small sample, not ranked
Sep 201812.5% of 40 movements — small sample, not ranked
Oct 201824.4% of 41 movements — small sample, not ranked
Nov 2018suppressed: fewer than twenty movements
Dec 201839.5% of 43 movements — small sample, not ranked
Jan 20197.7% of 52 movements
Feb 201929.2% of 48 movements — small sample, not ranked
Mar 201920.7% of 58 movements
Apr 20195.1% of 39 movements — small sample, not ranked
May 20194.9% of 41 movements — small sample, not ranked
Jun 201910.3% of 39 movements — small sample, not ranked
Jul 201920.9% of 43 movements — small sample, not ranked
Aug 201910.5% of 38 movements — small sample, not ranked
Sep 201915.0% of 40 movements — small sample, not ranked
Oct 20195.3% of 38 movements — small sample, not ranked
Nov 2019no events in 26 movements — small sample, not ranked
Dec 201923.0% of 61 movements
Jan 202014.7% of 68 movements
Feb 202027.5% of 80 movements
Mar 202041.4% of 58 movements
Apr 2020suppressed: fewer than twenty movements
May 2020suppressed: fewer than twenty movements
Jun 2020suppressed: fewer than twenty movements
Jul 2020suppressed: fewer than twenty movements
Aug 2020suppressed: fewer than twenty movements
Sep 2020suppressed: fewer than twenty movements
Oct 2020suppressed: fewer than twenty movements
Nov 2020suppressed: fewer than twenty movements
Dec 2020suppressed: fewer than twenty movements
Jan 2021suppressed: fewer than twenty movements
Feb 2021suppressed: fewer than twenty movements
Mar 2021suppressed: fewer than twenty movements
Apr 2021suppressed: fewer than twenty movements
May 2021no data
Jun 2021no data
Jul 2021suppressed: fewer than twenty movements
Aug 2021suppressed: fewer than twenty movements
Sep 2021suppressed: fewer than twenty movements
Oct 2021suppressed: fewer than twenty movements
Nov 2021suppressed: fewer than twenty movements
Dec 202114.3% of 35 movements — small sample, not ranked
Jan 202216.7% of 30 movements — small sample, not ranked
Feb 202228.0% of 50 movements
Mar 202217.9% of 67 movements
Apr 202214.3% of 35 movements — small sample, not ranked
May 202230.3% of 33 movements — small sample, not ranked
Jun 202233.3% of 36 movements — small sample, not ranked
Jul 202215.6% of 32 movements — small sample, not ranked
Aug 202214.7% of 34 movements — small sample, not ranked
Sep 202233.3% of 33 movements — small sample, not ranked
Oct 202220.6% of 34 movements — small sample, not ranked
Nov 2022suppressed: fewer than twenty movements
Dec 202225.7% of 70 movements
Jan 202320.3% of 69 movements
Feb 202311.7% of 94 movements
Mar 202334.1% of 129 movements
Apr 202330.3% of 33 movements — small sample, not ranked
May 202336.4% of 33 movements — small sample, not ranked
Jun 202351.2% of 43 movements — small sample, not ranked
Jul 202345.0% of 40 movements — small sample, not ranked
Aug 202348.8% of 43 movements — small sample, not ranked
Sep 202329.3% of 41 movements — small sample, not ranked
Oct 202342.5% of 40 movements — small sample, not ranked
Nov 2023suppressed: fewer than twenty movements
Dec 202328.2% of 110 movements
Jan 202420.8% of 144 movements
Feb 202422.4% of 183 movements
Mar 202418.8% of 160 movements
Apr 202421.0% of 124 movements
May 202419.2% of 73 movements
Jun 202435.7% of 70 movements
Jul 202441.7% of 60 movements
Aug 202420.8% of 53 movements
Sep 202426.2% of 65 movements
Oct 202425.0% of 64 movements
Nov 20243.2% of 31 movements — small sample, not ranked
Dec 202442.7% of 131 movements
Jan 202536.4% of 151 movements
Feb 202525.0% of 172 movements
Mar 202513.2% of 182 movements
Apr 202517.5% of 103 movements
May 202524.6% of 61 movements
Jun 202522.8% of 57 movements
Jul 202530.2% of 63 movements
Aug 202516.9% of 59 movements
Sep 202531.6% of 57 movements
Oct 202528.8% of 52 movements
Nov 202520.8% of 24 movements — small sample, not ranked
Dec 202526.8% of 127 movements
Jan 202631.1% of 151 movements
Feb 202623.9% of 142 movements
Mar 202616.6% of 157 movements
Apr 202631.7% of 82 movements
May 202618.0% of 61 movements
Jun 202636.5% of 63 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.

EventDirectionDisruption that monthBaseline beforeReturn to baseline
Pandemic regime · Jun 2020Arrivalssuppressed: fewer than twenty movementsno complete baselinenot enough data: needs a complete baseline and a publishable event month
Pandemic regime · Jun 2020Departuressuppressed: fewer than twenty movementsno complete baselinenot enough data: needs a complete baseline and a publishable event month
Summer 2022 breakdown · Jul 2022Arrivals15.6% of 32 movements — small sample, not rankedno complete baselinenot enough data: needs a complete baseline and a publishable event month
Summer 2022 breakdown · Jul 2022Departures65.6% of 32 movements — small sample, not rankedno complete baselinenot enough data: needs a complete baseline and a publishable event month
NATS system failure · Aug 2023Arrivals48.8% of 43 movements — small sample, not rankedno complete baselinenot enough data: needs a complete baseline and a publishable event month
NATS system failure · Aug 2023Departures68.3% of 41 movements — small sample, not rankedno complete baselinenot enough data: needs a complete baseline and a publishable event month
Heathrow fire closure · Mar 2025Arrivals13.2% of 182 movements26.3% across 1,154 flightsreturned the next month
Heathrow fire closure · Mar 2025Departures20.9% of 182 movements38.3% across 1,148 flightsreturned 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, 33.3% across 7 months. Lowest median: Nov, 3.2% across 3 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.

Seasonality: calendar month by year; share and nJanFebMarAprMayJunJulAugSepOctNovDec20197.7% of 52 movements29.2% of 48 movements †20.7% of 58 movements5.1% of 39 movements †4.9% of 41 movements †10.3% of 39 movements †20.9% of 43 movements †10.5% of 38 movements †15.0% of 40 movements †5.3% of 38 movements †no events in 26 movements †23.0% of 61 movements202014.7% of 68 movements27.5% of 80 movements41.4% of 58 movementssuppressed: fewer than twenty movementssuppressed: fewer than twenty movementssuppressed: fewer than twenty movementssuppressed: fewer than twenty movementssuppressed: fewer than twenty movementssuppressed: fewer than twenty movementssuppressed: fewer than twenty movementssuppressed: fewer than twenty movementssuppressed: fewer than twenty movements2021suppressed: fewer than twenty movementssuppressed: fewer than twenty movementssuppressed: fewer than twenty movementssuppressed: fewer than twenty movementsno datano datasuppressed: fewer than twenty movementssuppressed: fewer than twenty movementssuppressed: fewer than twenty movementssuppressed: fewer than twenty movementssuppressed: fewer than twenty movements14.3% of 35 movements †202216.7% of 30 movements †28.0% of 50 movements17.9% of 67 movements14.3% of 35 movements †30.3% of 33 movements †33.3% of 36 movements †15.6% of 32 movements †14.7% of 34 movements †33.3% of 33 movements †20.6% of 34 movements †suppressed: fewer than twenty movements25.7% of 70 movements202320.3% of 69 movements11.7% of 94 movements34.1% of 129 movements30.3% of 33 movements †36.4% of 33 movements †51.2% of 43 movements †45.0% of 40 movements †48.8% of 43 movements †29.3% of 41 movements †42.5% of 40 movements †suppressed: fewer than twenty movements28.2% of 110 movements202420.8% of 144 movements22.4% of 183 movements18.8% of 160 movements21.0% of 124 movements19.2% of 73 movements35.7% of 70 movements41.7% of 60 movements20.8% of 53 movements26.2% of 65 movements25.0% of 64 movements3.2% of 31 movements †42.7% of 131 movements202536.4% of 151 movements25.0% of 172 movements13.2% of 182 movements17.5% of 103 movements24.6% of 61 movements22.8% of 57 movements30.2% of 63 movements16.9% of 59 movements31.6% of 57 movements28.8% of 52 movements20.8% of 24 movements †26.8% of 127 movements202631.1% of 151 movements23.9% of 142 movements16.6% of 157 movements31.7% of 82 movements18.0% of 61 movements36.5% of 63 movementsno datano datano datano datano datano data
Month-by-month table: median, observed range and sample
MonthMedianObserved rangeSample
Jan20.3%7.7–36.4%7 months, 652 flights
Feb23.9%11.7–29.2%7 months, 918 flights
Mar18.8%13.2–34.1%7 months, 824 flights
Apr17.5%5.1–31.7%7 months, 611 flights
May19.2%4.9–36.4%7 months, 342 flights
Jun33.3%10.3–51.2%7 months, 351 flights
Jul25.5%15.6–45.0%6 months, 279 flights
Aug17.2%10.5–48.8%6 months, 267 flights
Sep27.7%12.5–33.3%6 months, 276 flights
Oct24.7%5.3–42.5%6 months, 269 flights
Nov3.2%0.0–20.8%3 months, 81 flights
Dec27.5%23.0–42.7%6 months, 542 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 ↔ BALE-MULHOUSE, 18.6% of 194 movements. Highest disruption: EDI ↔ GENEVA, 30.0% of 160 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.

Observed disruption share by optionEdi ↔ Bale-Mulhouse18.6% of 194 flightsMan ↔ Geneva18.6% of 102 flightsSou ↔ Geneva23.0% of 61 flightsBrs ↔ Geneva23.2% of 56 flightsBhx ↔ Geneva28.6% of 266 flightsEdi ↔ Geneva30.0% of 160 flights
All route comparisons and sample flags
RouteDisruptionCancellationsSample flag
EDI ↔ BALE-MULHOUSE18.6% of 194 movements1.0% of 194 movementsdescriptive comparison
Manchester ↔ Geneva18.6% of 102 movements1.0% of 102 movementsdescriptive comparison
SOU ↔ GENEVA23.0% of 61 movements1.6% of 61 movementsdescriptive comparison
Bristol ↔ Geneva23.2% of 56 movements1.8% of 56 movementsdescriptive comparison
BHX ↔ GENEVA28.6% of 266 movements0.8% of 266 movementsdescriptive comparison
Edinburgh ↔ Geneva30.0% of 160 movements1.9% of 160 movementsdescriptive comparison
BOH ↔ GENEVA15.0% of 20 movements — small sample, not rankedno events in 20 movements — small sample, not rankedsmall sample; not ranked
Gatwick ↔ Geneva100.0% of 22 movements — small sample, not ranked100.0% of 22 movements — small sample, not rankedsmall sample; not ranked
NCL ↔ GENEVA15.0% of 40 movements — small sample, not rankedno events in 40 movements — small sample, not rankedsmall sample; not ranked
SEN ↔ GENEVA15.6% of 45 movements — small sample, not ranked2.2% of 45 movements — small sample, not rankedsmall 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?

10 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 airportDisruptionSample flag
Birmingham28.5% of 267 movementsdescriptive comparison
Bournemouth15.0% of 20 movements — small sample, not rankedsmall sample; not ranked
Bristol23.2% of 56 movementsdescriptive comparison
Edinburgh23.7% of 354 movementsdescriptive comparison
Gatwick100.0% of 31 movements — small sample, not rankedsmall sample; not ranked
Manchester19.0% of 105 movementsdescriptive comparison
Newcastle15.0% of 40 movements — small sample, not rankedsmall sample; not ranked
Southend15.6% of 45 movements — small sample, not rankedsmall sample; not ranked
Southampton23.0% of 61 movementsdescriptive comparison
Stansted17.6% of 34 movements — small sample, not rankedsmall 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

25.8% of 1,038 movements arrivals were disrupted, against 37.0% of 1,026 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

0.1% of 1,038 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

Easyjet Switzerland appears from Jan 2018 to Jun 2026 with 5,785 arrivals.

The bounds describe the published record, not every commercial service. Final point is not necessarily a nonstop destination.

Archive route pairs: 55.

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 1,038 movements over July 2025 to June 2026.

How often are they cancelled?

4.0% of 1,038 movements at short notice.

How late is late?

23.0–52.8 minutes; delayed denominator 226–475

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 complain
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.