UK FLIGHT DELAY INDEX

derived from CAA punctuality statistics for UK reporting airports

How often are these flights late or cancelled?

LHR ↔ ABU DHABI INTERNATIONAL

In the twelve months from July 2025 to June 2026, 29.9% of 1,527 movements arriving into LHR were disrupted — that is, they landed more than fifteen minutes late or were cancelled at short notice.

Put the other way round, 70.1% of 1,527 movements arrived on time by the industry's fifteen-minute standard. Severe delays were rarer: about one arrival in every 382 crossed the three-hour mark. Lower is better on every figure on this page. These numbers describe what happened on the route; they are not a prediction for any individual flight.

Definitions, denominators and limits
  • “Disrupted” means an arrival more than fifteen minutes late or a short-notice cancellation. The denominator is operated movements plus short-notice cancellations.
  • Arrivals into the UK airport only; all published carriers.
  • Crossing three hours is one condition for compensation, but monthly data cannot establish any individual passenger’s rights.
  • Delay cause is not published in the open data.
  • Source: CAA punctuality statistics · snapshot 17/08/2026 10:24 · method route-record-v2.1.

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

In the twelve months from July 2025 to June 2026, 29.9% of 1,527 movements were disrupted and 2.2% of 1,527 movements were cancelled at short notice.

When a flight was late, it was typically late by the range shown below. The delay is given as a range, not a single number, because the regulator rounds its published percentages and never says how many flights landed exactly on time.

Disruption shareShort-notice cancellationsAverage delay among delayed flights only — boundsOperations
29.9% of 1,527 movements2.2% of 1,527 movements26.8–52.2 min; N of delayed flights=424–7711,527
Definitions, denominators and limits

The bounds account for CAA rounding and the unknown number of zero delays. A point average across all operated movements, including punctual ones, would answer a different question and is not used here.

When it is late, how late is it?

Most delays here are short. The ladder below shows how many arrivals crossed each threshold, from a quarter of an hour up to six hours; each rung can only be smaller than the one above it.

Cancellations are counted separately: 2.2% of 1,527 movements. “One in N” means how many arrivals you would typically see between events at that level.

Delay threshold ladder; count and share of known operations15 min27.8%30 min15.7%60 min5.9%120 min0.8%180 min0.3%360 min0.1%
Delay ladder table: share, movements and one-in-N
DelayShare and nMovementsOne delay in every N operations
>15 min27.8% of 1,527 movements4243.6
>30 min15.7% of 1,527 movements2396.4
>60 min5.9% of 1,527 movements9017.0
>120 min0.8% of 1,527 movements12127.2
>180 min0.3% of 1,527 movements4381.8
>360 min0.1% of 1,527 movements11,527.0
Definitions, denominators and limits

CAA counts delays strictly greater than each threshold, so exactly three hours is inseparable from the previous bucket. The ladder describes the archive, not a forecast.

Slightly late, or occasionally a disaster?

When this route runs late, it is usually only a little late: big blow-ups are rarer here than on the typical UK route.

The histogram below counts every recorded arrival, from more than fifteen minutes early through to more than six hours late. A tall bar near the middle and a thin right-hand tail is the healthy shape.

Nine delay buckets, minutes; share of all recorded operations>15 early31820.8%15–1 early40526.5%0–15 late34722.7%16–3018512.1%31–601499.8%61…120785.1%121…18080.5%181…36030.2%>36010.1%D=1,527
Definitions, denominators and limits

Ratio of the long tail to sixteen-to-sixty-minute delays: 0.0120; corpus median 0.0217; 2056 routes in the corpus. The shape is compared conditionally among delays; the class name does not measure absolute frequency. Histogram counts and shares cover all recorded operations including unmatched records; reconstructed uniquely.

Has this route got better or worse since 2018?

Best month: Aug 2020, no events in 54 movements. Worst month: May 2026, 70.2% of 124 movements.

The line traces every month in the archive; lower is better. Gaps are months with no published data, never zeros. The 2020 and 2021 readings reflect the pandemic, not normal service.

Monthly disruption share; gaps mean no published dataJan 2018: 28.8%; sample: 1252018Feb 2018: 13.4%; sample: 112Mar 2018: 12.9%; sample: 124Apr 2018: 18.3%; sample: 120May 2018: 8.5%; sample: 118Jun 2018: 4.3%; sample: 116Jul 2018: 9.7%; sample: 124Aug 2018: 8.9%; sample: 124Sep 2018: 12.4%; sample: 121Oct 2018: 10.5%; sample: 124Nov 2018: 4.2%; sample: 120Dec 2018: 20.3%; sample: 138Jan 2019: 13.2%; sample: 1362019Feb 2019: 8.0%; sample: 112Mar 2019: 24.1%; sample: 116Apr 2019: 17.9%; sample: 140May 2019: 13.0%; sample: 123Jun 2019: 9.2%; sample: 153Jul 2019: 8.4%; sample: 178Aug 2019: 17.7%; sample: 186Sep 2019: 19.9%; sample: 176Oct 2019: 16.8%; sample: 155Nov 2019: 14.7%; sample: 150Dec 2019: 11.6%; sample: 155Jan 2020: 32.2%; sample: 1492020Feb 2020: 36.4%; sample: 140Mar 2020: 15.7%; sample: 121Apr 2020: suppressed: fewer than twenty movements×May 2020: suppressed: fewer than twenty movements×Jun 2020: 14.8%; sample: 27Jul 2020: 0.0%; sample: 35Aug 2020: 0.0%; sample: 54Sep 2020: 1.4%; sample: 73Oct 2020: 4.8%; sample: 62Nov 2020: 1.7%; sample: 60Dec 2020: 14.8%; sample: 81Jan 2021: 5.7%; sample: 882021Feb 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: 1.7%; sample: 59Jul 2021: 7.7%; sample: 65Aug 2021: 23.5%; sample: 85Sep 2021: 18.9%; sample: 90Oct 2021: 38.7%; sample: 93Nov 2021: 15.6%; sample: 90Dec 2021: 39.8%; sample: 93Jan 2022: 32.6%; sample: 892022Feb 2022: 24.0%; sample: 75Mar 2022: 21.1%; sample: 95Apr 2022: 17.8%; sample: 90May 2022: 9.6%; sample: 125Jun 2022: 19.2%; sample: 120Jul 2022: 16.3%; sample: 153Aug 2022: 8.4%; sample: 155Sep 2022: 9.2%; sample: 130Oct 2022: 25.0%; sample: 124Nov 2022: 6.7%; sample: 120Dec 2022: 16.9%; sample: 124Jan 2023: 22.6%; sample: 1242023Feb 2023: 19.6%; sample: 112Mar 2023: 13.7%; sample: 124Apr 2023: 10.0%; sample: 120May 2023: 13.2%; sample: 106Jun 2023: 10.0%; sample: 120Jul 2023: 18.5%; sample: 124Aug 2023: 15.3%; sample: 124Sep 2023: 8.3%; sample: 120Oct 2023: 43.5%; sample: 124Nov 2023: 43.3%; sample: 120Dec 2023: 44.4%; sample: 124Jan 2024: 36.3%; sample: 1242024Feb 2024: 44.8%; sample: 116Mar 2024: 20.2%; sample: 124Apr 2024: 47.3%; sample: 131May 2024: 25.2%; sample: 155Jun 2024: 21.3%; sample: 150Jul 2024: 19.4%; sample: 155Aug 2024: 20.0%; sample: 155Sep 2024: 22.7%; sample: 150Oct 2024: 63.0%; sample: 154Nov 2024: 14.0%; sample: 150Dec 2024: 16.8%; sample: 155Jan 2025: 15.6%; sample: 1542025Feb 2025: 11.4%; sample: 140Mar 2025: 9.7%; sample: 154Apr 2025: 15.0%; sample: 120May 2025: 18.5%; sample: 124Jun 2025: 33.3%; sample: 120Jul 2025: 10.5%; sample: 124Aug 2025: 12.1%; sample: 124Sep 2025: 28.3%; sample: 120Oct 2025: 24.0%; sample: 129Nov 2025: 10.1%; sample: 149Dec 2025: 16.8%; sample: 155Jan 2026: 35.5%; sample: 1552026Feb 2026: 11.4%; sample: 140Mar 2026: 67.5%; sample: 80Apr 2026: 55.1%; sample: 107May 2026: 70.2%; sample: 124Jun 2026: 43.3%; sample: 120Pandemic regime Jun 2020Summer 2022 breakdown Jul 2022NATS system failure Aug 2023Heathrow fire closure Mar 2025100%0%
Every month since 2018, including gaps and suppressed cells
MonthDisruption on arrivals
Jan 201828.8% of 125 movements
Feb 201813.4% of 112 movements
Mar 201812.9% of 124 movements
Apr 201818.3% of 120 movements
May 20188.5% of 118 movements
Jun 20184.3% of 116 movements
Jul 20189.7% of 124 movements
Aug 20188.9% of 124 movements
Sep 201812.4% of 121 movements
Oct 201810.5% of 124 movements
Nov 20184.2% of 120 movements
Dec 201820.3% of 138 movements
Jan 201913.2% of 136 movements
Feb 20198.0% of 112 movements
Mar 201924.1% of 116 movements
Apr 201917.9% of 140 movements
May 201913.0% of 123 movements
Jun 20199.2% of 153 movements
Jul 20198.4% of 178 movements
Aug 201917.7% of 186 movements
Sep 201919.9% of 176 movements
Oct 201916.8% of 155 movements
Nov 201914.7% of 150 movements
Dec 201911.6% of 155 movements
Jan 202032.2% of 149 movements
Feb 202036.4% of 140 movements
Mar 202015.7% of 121 movements
Apr 2020suppressed: fewer than twenty movements
May 2020suppressed: fewer than twenty movements
Jun 202014.8% of 27 movements — small sample, not ranked
Jul 2020no events in 35 movements — small sample, not ranked
Aug 2020no events in 54 movements
Sep 20201.4% of 73 movements
Oct 20204.8% of 62 movements
Nov 20201.7% of 60 movements
Dec 202014.8% of 81 movements
Jan 20215.7% of 88 movements
Feb 2021suppressed: fewer than twenty movements
Mar 2021suppressed: fewer than twenty movements
Apr 2021suppressed: fewer than twenty movements
May 2021suppressed: fewer than twenty movements
Jun 20211.7% of 59 movements
Jul 20217.7% of 65 movements
Aug 202123.5% of 85 movements
Sep 202118.9% of 90 movements
Oct 202138.7% of 93 movements
Nov 202115.6% of 90 movements
Dec 202139.8% of 93 movements
Jan 202232.6% of 89 movements
Feb 202224.0% of 75 movements
Mar 202221.1% of 95 movements
Apr 202217.8% of 90 movements
May 20229.6% of 125 movements
Jun 202219.2% of 120 movements
Jul 202216.3% of 153 movements
Aug 20228.4% of 155 movements
Sep 20229.2% of 130 movements
Oct 202225.0% of 124 movements
Nov 20226.7% of 120 movements
Dec 202216.9% of 124 movements
Jan 202322.6% of 124 movements
Feb 202319.6% of 112 movements
Mar 202313.7% of 124 movements
Apr 202310.0% of 120 movements
May 202313.2% of 106 movements
Jun 202310.0% of 120 movements
Jul 202318.5% of 124 movements
Aug 202315.3% of 124 movements
Sep 20238.3% of 120 movements
Oct 202343.5% of 124 movements
Nov 202343.3% of 120 movements
Dec 202344.4% of 124 movements
Jan 202436.3% of 124 movements
Feb 202444.8% of 116 movements
Mar 202420.2% of 124 movements
Apr 202447.3% of 131 movements
May 202425.2% of 155 movements
Jun 202421.3% of 150 movements
Jul 202419.4% of 155 movements
Aug 202420.0% of 155 movements
Sep 202422.7% of 150 movements
Oct 202463.0% of 154 movements
Nov 202414.0% of 150 movements
Dec 202416.8% of 155 movements
Jan 202515.6% of 154 movements
Feb 202511.4% of 140 movements
Mar 20259.7% of 154 movements
Apr 202515.0% of 120 movements
May 202518.5% of 124 movements
Jun 202533.3% of 120 movements
Jul 202510.5% of 124 movements
Aug 202512.1% of 124 movements
Sep 202528.3% of 120 movements
Oct 202524.0% of 129 movements
Nov 202510.1% of 149 movements
Dec 202516.8% of 155 movements
Jan 202635.5% of 155 movements
Feb 202611.4% of 140 movements
Mar 202667.5% of 80 movements
Apr 202655.1% of 107 movements
May 202670.2% of 124 movements
Jun 202643.3% of 120 movements

What did the big disruptions actually do here?

Each named event below is shown against this route’s own baseline for the twelve months before it, and against how long the route took to get back to that baseline.

A month worse than baseline is not proof the named event caused it: the open data carry no delay-cause field at all. Some events sit near the edge of the archive, which limits how long a recovery can be traced.

EventDirectionDisruption that monthBaseline beforeReturn to baseline
Pandemic regime · Jun 2020Arrivals14.8% of 27 movements — small sample, not rankedno complete baselinenot enough data: needs a complete baseline and a publishable event month
Pandemic regime · Jun 2020Departures22.2% of 27 movements — small sample, not rankedno complete baselinenot enough data: needs a complete baseline and a publishable event month
Summer 2022 breakdown · Jul 2022Arrivals16.3% of 153 movements22.4% across 1,110 flightsreturned the next month
Summer 2022 breakdown · Jul 2022Departures63.4% of 153 movements43.0% across 1,145 flightsreturned the next month
NATS system failure · Aug 2023Arrivals15.3% of 124 movements14.5% across 1,483 flightsreturned the next month
NATS system failure · Aug 2023Departures30.6% of 124 movements20.3% across 1,481 flightsreturned after 5 months
Heathrow fire closure · Mar 2025Arrivals9.7% of 154 movements24.7% across 1,773 flightsreturned the next month
Heathrow fire closure · Mar 2025Departures12.9% of 155 movements26.0% across 1,774 flightsreturned the next month
Definitions, denominators and limits

The baseline is the unweighted mean share over the twelve preceding calendar months. The return window is the following eight months, up to the end of the archive. Return means the first observed value at or below the baseline; it is not the duration of the disruption itself. If the event month is already below the baseline, counting still starts the month after. Gaps and suppressed cells are not treated as zeros or as recovery.

Which time of year has historically been hardest?

January has historically been the hardest month on this route: in a typical January, 28.8% of arrivals were disrupted, measured across 7 Januarys in the archive. November has been the calmest, at 12.0% across 6 Novembers.

Even January has ranged from 13.2% to 36.3% in different years, so this is a record of what happened, not a forecast of what will. Lower is better throughout.

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 nJanFebMarAprMayJunJulAugSepOctNovDec201913.2% of 136 movements8.0% of 112 movements24.1% of 116 movements17.9% of 140 movements13.0% of 123 movements9.2% of 153 movements8.4% of 178 movements17.7% of 186 movements19.9% of 176 movements16.8% of 155 movements14.7% of 150 movements11.6% of 155 movements202032.2% of 149 movements36.4% of 140 movements15.7% of 121 movementssuppressed: fewer than twenty movementssuppressed: fewer than twenty movements14.8% of 27 movements †no events in 35 movements †no events in 54 movements1.4% of 73 movements4.8% of 62 movements1.7% of 60 movements14.8% of 81 movements20215.7% of 88 movementssuppressed: fewer than twenty movementssuppressed: fewer than twenty movementssuppressed: fewer than twenty movementssuppressed: fewer than twenty movements1.7% of 59 movements7.7% of 65 movements23.5% of 85 movements18.9% of 90 movements38.7% of 93 movements15.6% of 90 movements39.8% of 93 movements202232.6% of 89 movements24.0% of 75 movements21.1% of 95 movements17.8% of 90 movements9.6% of 125 movements19.2% of 120 movements16.3% of 153 movements8.4% of 155 movements9.2% of 130 movements25.0% of 124 movements6.7% of 120 movements16.9% of 124 movements202322.6% of 124 movements19.6% of 112 movements13.7% of 124 movements10.0% of 120 movements13.2% of 106 movements10.0% of 120 movements18.5% of 124 movements15.3% of 124 movements8.3% of 120 movements43.5% of 124 movements43.3% of 120 movements44.4% of 124 movements202436.3% of 124 movements44.8% of 116 movements20.2% of 124 movements47.3% of 131 movements25.2% of 155 movements21.3% of 150 movements19.4% of 155 movements20.0% of 155 movements22.7% of 150 movements63.0% of 154 movements14.0% of 150 movements16.8% of 155 movements202515.6% of 154 movements11.4% of 140 movements9.7% of 154 movements15.0% of 120 movements18.5% of 124 movements33.3% of 120 movements10.5% of 124 movements12.1% of 124 movements28.3% of 120 movements24.0% of 129 movements10.1% of 149 movements16.8% of 155 movements202635.5% of 155 movements11.4% of 140 movements67.5% of 80 movements55.1% of 107 movements70.2% of 124 movements43.3% of 120 movementsno datano datano datano datano datano data
Month-by-month table: median, observed range and sample
MonthMedianObserved rangeSample
Jan28.8%13.2–36.3%7 months, 907 flights
Feb13.4%8.0–44.8%7 months, 807 flights
Mar20.2%9.7–67.5%7 months, 817 flights
Apr17.9%10.0–55.1%7 months, 828 flights
May13.2%8.5–70.2%7 months, 875 flights
Jun19.2%4.3–43.3%7 months, 899 flights
Jul13.4%8.4–19.4%6 months, 858 flights
Aug13.7%8.4–20.0%6 months, 868 flights
Sep16.1%8.3–28.3%6 months, 817 flights
Oct24.5%10.5–63.0%6 months, 810 flights
Nov12.0%4.2–43.3%6 months, 809 flights
Dec16.9%11.6–44.4%6 months, 851 flights
Definitions, denominators and limits

The matrix shows the last eight calendar years, including an incomplete final year; the start of the archive is kept in the history above. Seasonal summaries use the whole available archive, excluding the pandemic regime 2020–2021; this is an observed range, not a forecast. Zero events, missing data and suppressed cells are marked separately. † marks a small sample, described but not ranked. For ranges the colour follows the upper bound.

Which airline has the better record here?

On the published record there is no clear winner: British Airways 17.1% of 129 movements, Etihad Airways 31.1% of 1,398 movements. Observed shares differ; the mix of operations is not matched, so no causal conclusion follows.

Figures cover arrivals, July 2025 to June 2026; lower is better in every column. Carriers with fewer than twenty published flights are suppressed rather than shown as zero. The page makes no ranking: the operations behind these shares are not matched for aircraft, time of day or season.

Observed disruption share by optionBritish Airways17.1% of 129 flightsEtihad Airways31.1% of 1,398 flights
Airline comparison table: operations, cancellations, three-hour delays and data quality
AirlineOperationsDisruptionCancellations>180 minData quality
British Airways12917.1% of 129 movements3.9% of 129 movementsno events in 129 movementsdescriptive comparison
Etihad Airways1,39831.1% of 1,398 movements2.0% of 1,398 movements0.3% of 1,398 movementsdescriptive comparison

The noise check is a descriptive approximation assuming independent operations. Delay correlation and mix differences are not estimated; no ranking is derived.

Would another UK airport have been better?

Among UK airports flying to this city with enough flights to publish, MAN had the lowest disruption share at 38.9% of 753 movements and MAN the highest at 38.9% of 753 movements. This route sits at 29.9% of 1,527 movements.

Each figure is arrivals into that UK airport, all carriers combined, over the same twelve months. It is a historical record, not a recommendation about where to fly from, and it says nothing about getting to or from each airport on the ground.

Observed disruption share by optionMan ↔ Abu-Dhabi-International38.9% of 753 flights
Airport comparison table: operations, cancellations, three-hour delays and data quality
Other UK airport to the same cityOperationsDisruptionCancellations>180 minData quality
Bfs ↔ Abu-Dhabi-Internationalsuppressed: fewer than twenty movementssuppressed: fewer than twenty movementssuppressed: fewer than twenty movementssuppressed: fewer than twenty movementssuppressed
Bhx ↔ Abu-Dhabi-Internationalsuppressed: fewer than twenty movementssuppressed: fewer than twenty movementssuppressed: fewer than twenty movementssuppressed: fewer than twenty movementssuppressed
Edi ↔ Abu-Dhabi-Internationalsuppressed: fewer than twenty movementssuppressed: fewer than twenty movementssuppressed: fewer than twenty movementssuppressed: fewer than twenty movementssuppressed
Lgw ↔ Abu-Dhabi-Internationalsuppressed: fewer than twenty movementssuppressed: fewer than twenty movementssuppressed: fewer than twenty movementssuppressed: fewer than twenty movementssuppressed
Man ↔ Abu-Dhabi-International75338.9% of 753 movements6.4% of 753 movements0.1% of 753 movementsdescriptive comparison
Stn ↔ Abu-Dhabi-Internationalsuppressed: fewer than twenty movementssuppressed: fewer than twenty movementssuppressed: fewer than twenty movementssuppressed: fewer than twenty movementssuppressed

Does the direction you are flying change anything?

Yes: arrivals into LHR ran 29.9% of 1,527 movements disrupted, departures 24.1% of 1,533 movements.

It matters legally as well as practically: a departure from the UK and an arrival into the UK on a UK or EU carrier fall under different conditions, and a departure delay does not establish a late arrival at your final destination.

Arrivals and departures side by side
DirectionDisruptionCancellationsOver three hours
Arrivals into LHR29.9% of 1,527 movements2.2% of 1,527 movements0.3% of 1,527 movements
Departures from LHR24.1% of 1,533 movements2.7% of 1,533 movements0.3% of 1,533 movements
Definitions, denominators and limits

CAA conditions on delays and cancellations.

How many flights here crossed the three-hour mark?

The table below counts arrivals and departures that ran more than three hours late — the threshold that is one of the conditions for compensation — across the whole archive and within the last six years.

The pound figure beside each count is arithmetic, not money anyone received: it is the count multiplied by the maximum statutory amount for this distance band. Whether any of those flights actually qualified is not knowable from this data.

DirectionWindowFlights over three hoursArithmetic statutory ceiling
ArrivalsWhole archive · Jan 2018–Jun 202638 flights out of 11,63638 × £520 = £19,760
ArrivalsLast 72 months · Jul 2020–Jun 202625 flights out of 7,92925 × £520 = £13,000
DeparturesWhole archive · Jan 2018–Jun 202650 flights out of 12,06350 × £520 = £26,000
DeparturesLast 72 months · Jul 2020–Jun 202634 flights out of 8,35934 × £520 = £17,680
Definitions, denominators and limits

Full formula: the count is the sum of the two tail buckets across months, carriers and service types in one direction; the ceiling is that count multiplied by the maximum statutory amount for the distance band. The condition is: if every such delay had been the carrier's fault and a claim had been filed on every one of them.

This is conditional arithmetic over operations: passenger numbers, legal applicability and the number of claims are all unknown. For departures it is an arithmetic scenario only, because arrival at the final point is not observed. For long routes the maximum ceiling is used; any reduction in the payable amount is not calculated.

The archive window is counted from the last month of data, not from today: this is not a limitation check for an individual case. The CAA states six years for England and Wales and five for Scotland. CAA: time limits and how to complain. Information, not a legal service.

The facts about this route

Route reference table: codes, distance, frequency, archive span
FieldValue
UK airportHEATHROW · LHR
Final point / countryABU DHABI INTERNATIONAL / UNITED ARAB EMIRATES
Final point codesAUH / OMAA
Great-circle distance5,516 km
Maximum statutory amount for the band£520
Average operated arrivals per day4.09
Presence in the latest twelve-month windowoperations present in every month of the latest twelve-month window
First and last active monthJan 2018–Jun 2026
Months with operations in the archive99

origin_destination is the final point of the CAA service, not evidence of a nonstop connection. The distance joins the coordinates of the named airports; the actual track is unknown. Frequency describes published operations.

What this data cannot tell you

Delay cause is not published in the regulator's open data. Monthly aggregates describe a population, not a specific flight. Cells below twenty operations are suppressed; twenty to forty-nine are descriptive only and not ranked. Arrivals and departures do not add up. Cancellations are short-notice only, by the CAA definition. A movement is not the same as a scheduled flight.

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.

Data-quality counters for this route

Zero observed events does not mean zero risk. Operator coverage against the Summary file is not established in this record; comparisons are limited to the published population.

Unmatched records: 0; all recorded operations: 1,527; excluded by quarantine: 0.

Quick answers

How often is this route disrupted?

29.9% of 1,527 movements over July 2025 to June 2026. Arrivals into the UK airport; all published carriers.

How many flights are cancelled at short notice?

2.2% of 1,527 movements in the same window.

How many delays crossed three hours?

0.3% of 1,527 movements in the same window; these are observed movements, not a count of claims.

What does the delay distribution look like?

chronically slightly late. The class compares the tail with short delays across routes in the corpus.

What distance is used?

5,516 km, great-circle.

Can compensation entitlement be established here?

No. The cause and the circumstances of an individual flight are unknown. Official CAA conditions.

Why do some cells say "no data"?

That month is absent from the published series. Small cells carry a separate "suppressed" marker; a gap is never replaced by a zero.

How this was calculated

Dataset version, input hashes and reconstruction rules

Dataset version: 396da8dde2874f14; method route-record-v2.1.

Versioned register of every number and the entity map · Input hashes · Correction log · Reconstruction and formulas.

Reconstruction: integer counts inside the rounding bounds of shares of D, summing to M. Ambiguity is preserved as a range of feasible counts; non-convergence stays in quarantine. The map of codes and coordinates is pinned by hash alongside the data. Raw CSV files are not included in the published output.

Your trip has already gone wrong — what now?

The official route to complain

Contact the airline first, then the relevant ADR body or the CAA. The right to care is assessed separately from compensation; time limits and circumstances are checked case by case. CAA: how to complain.

Reconstruction and formulas

Open the versioned claim register

Was your flight delayed 3h+? Check what you may be owed

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