UK FLIGHT DELAY INDEX

derived from CAA punctuality statistics for UK reporting airports

How often are these flights late or cancelled?

Pegasus Airlines

In the twelve months from July 2025 to June 2026, 27.4% of 4,320 movements arriving into the UK were disrupted — more than fifteen minutes late or cancelled at short notice.

Put the other way round, 72.6% of 4,320 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

27.4% of 4,320 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
27.4% of 4,320 movements0.3% of 4,320 movements22.2–50.5 minutes; delayed denominator 1,169–2,4620.2% of 4,320 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?

0.2% of 4,320 movements passed the three-hour mark.

The ladder shows how many movements crossed each threshold. Cancellations are separate: 0.3% of 4,320 movements.

DelayShare and sampleOne event per movements
More than 15 minutes27.1% of 4,320 movements3.7
More than 30 minutes13.1% of 4,320 movements7.7
More than 60 minutes4.2% of 4,320 movements24.0
More than 120 minutes0.7% of 4,320 movements135.0
More than 180 minutes0.2% of 4,320 movements540.0
More than 360 minutes0.0% of 4,320 movements4,320.0
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?

0.7% of 4,320 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 early52612.2%15–1 early1,31730.5%0–15 late1,29329.9%16–3060514.0%31–603848.9%61…1201483.4%121…180240.6%181…36070.2%>36010.0%D=4,320
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 2020, 1.8% of 225 movements. Worst month: Feb 2020, 64.5% of 155 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: 55.0%; sample: 1092018Feb 2018: 18.8%; sample: 96Mar 2018: 21.5%; sample: 107Apr 2018: 10.5%; sample: 105May 2018: 4.3%; sample: 115Jun 2018: 11.9%; sample: 118Jul 2018: 26.6%; sample: 128Aug 2018: 27.5%; sample: 131Sep 2018: 34.1%; sample: 129Oct 2018: 13.4%; sample: 119Nov 2018: 14.3%; sample: 105Dec 2018: 33.3%; sample: 114Jan 2019: 29.7%; sample: 1182019Feb 2019: 29.7%; sample: 111Mar 2019: 36.0%; sample: 114Apr 2019: 7.8%; sample: 141May 2019: 10.4%; sample: 135Jun 2019: 16.4%; sample: 146Jul 2019: 33.0%; sample: 179Aug 2019: 26.7%; sample: 195Sep 2019: 20.7%; sample: 203Oct 2019: 16.2%; sample: 191Nov 2019: 8.8%; sample: 159Dec 2019: 16.4%; sample: 189Jan 2020: 26.2%; sample: 1952020Feb 2020: 64.5%; sample: 155Mar 2020: 28.4%; sample: 95Apr 2020: suppressed: fewer than twenty movements×May 2020: suppressed: fewer than twenty movements×Jun 2020: suppressed: fewer than twenty movements×Jul 2020: 5.1%; sample: 117Aug 2020: 6.0%; sample: 218Sep 2020: 1.8%; sample: 225Oct 2020: 12.8%; sample: 149Nov 2020: 11.7%; sample: 77Dec 2020: 12.5%; sample: 80Jan 2021: 26.9%; sample: 522021Feb 2021: 48.6%; sample: 37Mar 2021: 51.2%; sample: 41Apr 2021: 37.5%; sample: 64May 2021: 68.0%; sample: 25Jun 2021: suppressed: fewer than twenty movements×Jul 2021: 36.4%; sample: 33Aug 2021: 68.0%; sample: 25Sep 2021: 41.8%; sample: 55Oct 2021: 20.0%; sample: 115Nov 2021: 23.6%; sample: 157Dec 2021: 19.0%; sample: 184Jan 2022: 33.0%; sample: 2002022Feb 2022: 39.5%; sample: 172Mar 2022: 20.5%; sample: 176Apr 2022: 16.2%; sample: 210May 2022: 20.1%; sample: 204Jun 2022: 24.6%; sample: 211Jul 2022: 36.3%; sample: 300Aug 2022: 26.5%; sample: 298Sep 2022: 49.5%; sample: 289Oct 2022: 52.9%; sample: 306Nov 2022: 19.7%; sample: 203Dec 2022: 50.0%; sample: 226Jan 2023: 42.2%; sample: 2062023Feb 2023: 42.1%; sample: 197Mar 2023: 27.3%; sample: 209Apr 2023: 29.6%; sample: 270May 2023: 20.5%; sample: 292Jun 2023: 32.7%; sample: 333Jul 2023: 55.6%; sample: 322Aug 2023: 53.7%; sample: 339Sep 2023: 35.0%; sample: 329Oct 2023: 47.3%; sample: 317Nov 2023: 54.2%; sample: 190Dec 2023: 41.5%; sample: 234Jan 2024: 41.2%; sample: 2602024Feb 2024: 22.4%; sample: 241Mar 2024: 3.4%; sample: 268Apr 2024: 19.6%; sample: 285May 2024: 17.4%; sample: 298Jun 2024: 46.1%; sample: 306Jul 2024: 60.1%; sample: 351Aug 2024: 29.6%; sample: 388Sep 2024: 24.0%; sample: 362Oct 2024: 24.7%; sample: 365Nov 2024: 15.5%; sample: 297Dec 2024: 11.1%; sample: 307Jan 2025: 26.0%; sample: 3192025Feb 2025: 22.9%; sample: 280Mar 2025: 5.1%; sample: 296Apr 2025: 19.7%; sample: 319May 2025: 33.1%; sample: 335Jun 2025: 23.1%; sample: 364Jul 2025: 26.2%; sample: 405Aug 2025: 24.1%; sample: 431Sep 2025: 35.4%; sample: 398Oct 2025: 35.7%; sample: 395Nov 2025: 20.2%; sample: 331Dec 2025: 26.1%; sample: 356Jan 2026: 49.3%; sample: 3532026Feb 2026: 27.8%; sample: 317Mar 2026: 20.6%; sample: 354Apr 2026: 20.9%; sample: 382May 2026: 20.8%; sample: 331Jun 2026: 18.0%; sample: 267Pandemic regime Jun 2020Summer 2022 breakdown Jul 2022NATS system failure Aug 2023Heathrow fire closure Mar 2025100%0%
Every monthly observation
MonthDisruption on arrivals
Jan 201855.0% of 109 movements
Feb 201818.8% of 96 movements
Mar 201821.5% of 107 movements
Apr 201810.5% of 105 movements
May 20184.3% of 115 movements
Jun 201811.9% of 118 movements
Jul 201826.6% of 128 movements
Aug 201827.5% of 131 movements
Sep 201834.1% of 129 movements
Oct 201813.4% of 119 movements
Nov 201814.3% of 105 movements
Dec 201833.3% of 114 movements
Jan 201929.7% of 118 movements
Feb 201929.7% of 111 movements
Mar 201936.0% of 114 movements
Apr 20197.8% of 141 movements
May 201910.4% of 135 movements
Jun 201916.4% of 146 movements
Jul 201933.0% of 179 movements
Aug 201926.7% of 195 movements
Sep 201920.7% of 203 movements
Oct 201916.2% of 191 movements
Nov 20198.8% of 159 movements
Dec 201916.4% of 189 movements
Jan 202026.2% of 195 movements
Feb 202064.5% of 155 movements
Mar 202028.4% of 95 movements
Apr 2020suppressed: fewer than twenty movements
May 2020suppressed: fewer than twenty movements
Jun 2020suppressed: fewer than twenty movements
Jul 20205.1% of 117 movements
Aug 20206.0% of 218 movements
Sep 20201.8% of 225 movements
Oct 202012.8% of 149 movements
Nov 202011.7% of 77 movements
Dec 202012.5% of 80 movements
Jan 202126.9% of 52 movements
Feb 202148.6% of 37 movements — small sample, not ranked
Mar 202151.2% of 41 movements — small sample, not ranked
Apr 202137.5% of 64 movements
May 202168.0% of 25 movements — small sample, not ranked
Jun 2021suppressed: fewer than twenty movements
Jul 202136.4% of 33 movements — small sample, not ranked
Aug 202168.0% of 25 movements — small sample, not ranked
Sep 202141.8% of 55 movements
Oct 202120.0% of 115 movements
Nov 202123.6% of 157 movements
Dec 202119.0% of 184 movements
Jan 202233.0% of 200 movements
Feb 202239.5% of 172 movements
Mar 202220.5% of 176 movements
Apr 202216.2% of 210 movements
May 202220.1% of 204 movements
Jun 202224.6% of 211 movements
Jul 202236.3% of 300 movements
Aug 202226.5% of 298 movements
Sep 202249.5% of 289 movements
Oct 202252.9% of 306 movements
Nov 202219.7% of 203 movements
Dec 202250.0% of 226 movements
Jan 202342.2% of 206 movements
Feb 202342.1% of 197 movements
Mar 202327.3% of 209 movements
Apr 202329.6% of 270 movements
May 202320.5% of 292 movements
Jun 202332.7% of 333 movements
Jul 202355.6% of 322 movements
Aug 202353.7% of 339 movements
Sep 202335.0% of 329 movements
Oct 202347.3% of 317 movements
Nov 202354.2% of 190 movements
Dec 202341.5% of 234 movements
Jan 202441.2% of 260 movements
Feb 202422.4% of 241 movements
Mar 20243.4% of 268 movements
Apr 202419.6% of 285 movements
May 202417.4% of 298 movements
Jun 202446.1% of 306 movements
Jul 202460.1% of 351 movements
Aug 202429.6% of 388 movements
Sep 202424.0% of 362 movements
Oct 202424.7% of 365 movements
Nov 202415.5% of 297 movements
Dec 202411.1% of 307 movements
Jan 202526.0% of 319 movements
Feb 202522.9% of 280 movements
Mar 20255.1% of 296 movements
Apr 202519.7% of 319 movements
May 202533.1% of 335 movements
Jun 202523.1% of 364 movements
Jul 202526.2% of 405 movements
Aug 202524.1% of 431 movements
Sep 202535.4% of 398 movements
Oct 202535.7% of 395 movements
Nov 202520.2% of 331 movements
Dec 202526.1% of 356 movements
Jan 202649.3% of 353 movements
Feb 202627.8% of 317 movements
Mar 202620.6% of 354 movements
Apr 202620.9% of 382 movements
May 202620.8% of 331 movements
Jun 202618.0% of 267 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 2022Arrivals36.3% of 300 movements30.2% across 1,742 flightsreturned the next month
Summer 2022 breakdown · Jul 2022Departures71.1% of 304 movements32.6% across 1,846 flightsreturned after 4 months
NATS system failure · Aug 2023Arrivals53.7% of 339 movements37.4% across 3,151 flightsreturned the next month
NATS system failure · Aug 2023Departures68.1% of 339 movements44.1% across 3,155 flightsreturned after 4 months
Heathrow fire closure · Mar 2025Arrivals5.1% of 296 movements25.0% across 3,826 flightsreturned the next month
Heathrow fire closure · Mar 2025Departures9.2% of 295 movements35.2% across 3,817 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: Jan, 41.2% across 7 months. Lowest median: Nov, 17.6% 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.

Seasonality: calendar month by year; share and nJanFebMarAprMayJunJulAugSepOctNovDec201929.7% of 118 movements29.7% of 111 movements36.0% of 114 movements7.8% of 141 movements10.4% of 135 movements16.4% of 146 movements33.0% of 179 movements26.7% of 195 movements20.7% of 203 movements16.2% of 191 movements8.8% of 159 movements16.4% of 189 movements202026.2% of 195 movements64.5% of 155 movements28.4% of 95 movementssuppressed: fewer than twenty movementssuppressed: fewer than twenty movementssuppressed: fewer than twenty movements5.1% of 117 movements6.0% of 218 movements1.8% of 225 movements12.8% of 149 movements11.7% of 77 movements12.5% of 80 movements202126.9% of 52 movements48.6% of 37 movements †51.2% of 41 movements †37.5% of 64 movements68.0% of 25 movements †suppressed: fewer than twenty movements36.4% of 33 movements †68.0% of 25 movements †41.8% of 55 movements20.0% of 115 movements23.6% of 157 movements19.0% of 184 movements202233.0% of 200 movements39.5% of 172 movements20.5% of 176 movements16.2% of 210 movements20.1% of 204 movements24.6% of 211 movements36.3% of 300 movements26.5% of 298 movements49.5% of 289 movements52.9% of 306 movements19.7% of 203 movements50.0% of 226 movements202342.2% of 206 movements42.1% of 197 movements27.3% of 209 movements29.6% of 270 movements20.5% of 292 movements32.7% of 333 movements55.6% of 322 movements53.7% of 339 movements35.0% of 329 movements47.3% of 317 movements54.2% of 190 movements41.5% of 234 movements202441.2% of 260 movements22.4% of 241 movements3.4% of 268 movements19.6% of 285 movements17.4% of 298 movements46.1% of 306 movements60.1% of 351 movements29.6% of 388 movements24.0% of 362 movements24.7% of 365 movements15.5% of 297 movements11.1% of 307 movements202526.0% of 319 movements22.9% of 280 movements5.1% of 296 movements19.7% of 319 movements33.1% of 335 movements23.1% of 364 movements26.2% of 405 movements24.1% of 431 movements35.4% of 398 movements35.7% of 395 movements20.2% of 331 movements26.1% of 356 movements202649.3% of 353 movements27.8% of 317 movements20.6% of 354 movements20.9% of 382 movements20.8% of 331 movements18.0% of 267 movementsno datano datano datano datano datano data
Month-by-month table: median, observed range and sample
MonthMedianObserved rangeSample
Jan41.2%26.0–55.0%7 months, 1,565 flights
Feb27.8%18.8–42.1%7 months, 1,414 flights
Mar20.6%3.4–36.0%7 months, 1,524 flights
Apr19.6%7.8–29.6%7 months, 1,712 flights
May20.1%4.3–33.1%7 months, 1,710 flights
Jun23.1%11.9–46.1%7 months, 1,745 flights
Jul34.6%26.2–60.1%6 months, 1,685 flights
Aug27.1%24.1–53.7%6 months, 1,782 flights
Sep34.5%20.7–49.5%6 months, 1,710 flights
Oct30.2%13.4–52.9%6 months, 1,693 flights
Nov17.6%8.8–54.2%6 months, 1,285 flights
Dec29.7%11.1–50.0%6 months, 1,426 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: BRS ↔ ISTANBUL-SABIHA-GOKCEN, 13.6% of 140 movements. Highest disruption: BHX ↔ ISTANBUL-SABIHA-GOKCEN, 34.1% of 308 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 optionBrs ↔ Istanbul-Sabiha-Gokcen13.6% of 140 flightsStn ↔ Antalya21.6% of 241 flightsStn ↔ Izmir-Adnan-Menderes22.0% of 422 flightsMan ↔ Istanbul-Sabiha-Gokcen30.2% of 686 flightsEdi ↔ Istanbul-Sabiha-Gokcen33.1% of 329 flightsBhx ↔ Istanbul-Sabiha-Gokcen34.1% of 308 flights
All route comparisons and sample flags
RouteDisruptionCancellationsSample flag
BRS ↔ ISTANBUL-SABIHA-GOKCEN13.6% of 140 movements2.9% of 140 movementsdescriptive comparison
Stansted ↔ Antalya21.6% of 241 movementsno events in 241 movementsdescriptive comparison
Stansted ↔ Izmir (Adnan Menderes)22.0% of 422 movements0.2% of 422 movementsdescriptive comparison
Manchester ↔ Antalya22.2% of 117 movementsno events in 117 movementsdescriptive comparison
STN ↔ ANKARA-ESENBOGA24.0% of 167 movementsno events in 167 movementsdescriptive comparison
Stansted ↔ Istanbul (Sabiha Gokcen)28.5% of 1,858 movements0.5% of 1,858 movementsdescriptive comparison
Manchester ↔ Istanbul (Sabiha Gokcen)30.2% of 686 movements0.1% of 686 movementsdescriptive comparison
EDI ↔ ISTANBUL-SABIHA-GOKCEN33.1% of 329 movementsno events in 329 movementsdescriptive comparison
BHX ↔ ISTANBUL-SABIHA-GOKCEN34.1% of 308 movementsno events in 308 movementsdescriptive 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 airportDisruptionSample flag
Birmingham34.1% of 308 movementsdescriptive comparison
Bristol13.6% of 140 movementsdescriptive comparison
Edinburgh33.1% of 329 movementsdescriptive comparison
Manchester29.0% of 804 movementsdescriptive comparison
Stansted26.3% of 2,722 movementsdescriptive 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

27.4% of 4,320 movements arrivals were disrupted, against 35.4% of 4,320 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

0.2% of 4,320 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

Pegasus Airlines appears from Jan 2018 to Jun 2026 with 21,369 arrivals.

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

Archive route pairs: 33.

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?

27.4% of 4,320 movements over July 2025 to June 2026.

How often are they cancelled?

0.3% of 4,320 movements at short notice.

How late is late?

22.2–50.5 minutes; delayed denominator 1,169–2,462

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.