UK FLIGHT DELAY INDEX

derived from CAA punctuality statistics for UK reporting airports

How often are these flights late or cancelled?

El Al

In the twelve months from July 2025 to June 2026, 21.0% of 1,001 movements arriving into the UK were disrupted — more than fifteen minutes late or cancelled at short notice.

Put the other way round, 79.0% of 1,001 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

21.0% of 1,001 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
21.0% of 1,001 movements3.0% of 1,001 movements21.0–55.4 minutes; delayed denominator 180–4290.4% of 1,001 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?

0.4% of 1,001 movements passed the three-hour mark.

The ladder shows how many movements crossed each threshold. Cancellations are separate: 3.0% of 1,001 movements.

DelayShare and sampleOne event per movements
More than 15 minutes18.0% of 1,001 movements5.6
More than 30 minutes8.2% of 1,001 movements12.2
More than 60 minutes3.5% of 1,001 movements28.6
More than 120 minutes1.1% of 1,001 movements91.0
More than 180 minutes0.4% of 1,001 movements250.2
More than 360 minutesno events in 1,001 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?

1.1% of 1,001 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 early21121.1%15–1 early33133.1%0–15 late24924.9%16–30989.8%31–60474.7%61…120242.4%121…18070.7%181…36040.4%>36000.0%D=1,001
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: Nov 2022, 5.6% of 72 movements. Worst month: Mar 2026, 60.3% of 58 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: 29.6%; sample: 712018Feb 2018: 16.4%; sample: 61Mar 2018: 28.2%; sample: 78Apr 2018: 23.3%; sample: 86May 2018: 23.0%; sample: 87Jun 2018: 21.3%; sample: 89Jul 2018: 20.8%; sample: 120Aug 2018: 20.8%; sample: 120Sep 2018: 29.2%; sample: 72Oct 2018: 20.5%; sample: 83Nov 2018: 9.2%; sample: 65Dec 2018: 33.8%; sample: 65Jan 2019: 6.2%; sample: 642019Feb 2019: 7.1%; sample: 56Mar 2019: 27.3%; sample: 66Apr 2019: 26.3%; sample: 95May 2019: 11.2%; sample: 98Jun 2019: 30.0%; sample: 100Jul 2019: 29.6%; sample: 125Aug 2019: 33.6%; sample: 122Sep 2019: 15.7%; sample: 102Oct 2019: 14.8%; sample: 81Nov 2019: 8.3%; sample: 72Dec 2019: 22.8%; sample: 79Jan 2020: 11.4%; sample: 702020Feb 2020: 22.2%; sample: 63Mar 2020: 23.5%; sample: 34Apr 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: 16.0%; sample: 25Jun 2021: 0.0%; sample: 29Jul 2021: 20.8%; sample: 48Aug 2021: 9.5%; sample: 21Sep 2021: 4.8%; sample: 21Oct 2021: 5.7%; sample: 35Nov 2021: 2.5%; sample: 40Dec 2021: 7.9%; sample: 38Jan 2022: 14.3%; sample: 282022Feb 2022: 10.8%; sample: 37Mar 2022: 11.3%; sample: 62Apr 2022: 29.6%; sample: 81May 2022: 10.4%; sample: 77Jun 2022: 13.9%; sample: 72Jul 2022: 18.7%; sample: 75Aug 2022: 5.6%; sample: 89Sep 2022: 21.3%; sample: 75Oct 2022: 14.7%; sample: 75Nov 2022: 5.6%; sample: 72Dec 2022: 32.0%; sample: 75Jan 2023: 8.7%; sample: 692023Feb 2023: 17.7%; sample: 62Mar 2023: 24.1%; sample: 79Apr 2023: 19.2%; sample: 78May 2023: 13.7%; sample: 95Jun 2023: 26.3%; sample: 95Jul 2023: 19.8%; sample: 96Aug 2023: 16.0%; sample: 100Sep 2023: 17.1%; sample: 76Oct 2023: 43.6%; sample: 94Nov 2023: 32.8%; sample: 61Dec 2023: 30.1%; sample: 83Jan 2024: 28.6%; sample: 772024Feb 2024: 25.0%; sample: 80Mar 2024: 9.9%; sample: 71Apr 2024: 29.5%; sample: 95May 2024: 26.1%; sample: 111Jun 2024: 24.0%; sample: 96Jul 2024: 30.7%; sample: 114Aug 2024: 31.8%; sample: 107Sep 2024: 45.0%; sample: 109Oct 2024: 37.1%; sample: 89Nov 2024: 28.2%; sample: 85Dec 2024: 26.3%; sample: 95Jan 2025: 24.0%; sample: 962025Feb 2025: 17.0%; sample: 88Mar 2025: 12.2%; sample: 98Apr 2025: 15.8%; sample: 101May 2025: 16.0%; sample: 94Jun 2025: 35.5%; sample: 62Jul 2025: 14.0%; sample: 100Aug 2025: 17.0%; sample: 94Sep 2025: 32.6%; sample: 86Oct 2025: 25.0%; sample: 76Nov 2025: 8.4%; sample: 83Dec 2025: 16.5%; sample: 91Jan 2026: 19.8%; sample: 862026Feb 2026: 9.9%; sample: 81Mar 2026: 60.3%; sample: 58Apr 2026: 13.3%; sample: 60May 2026: 15.6%; sample: 90Jun 2026: 30.2%; sample: 96Pandemic regime Jun 2020Summer 2022 breakdown Jul 2022NATS system failure Aug 2023Heathrow fire closure Mar 2025100%0%
Every monthly observation
MonthDisruption on arrivals
Jan 201829.6% of 71 movements
Feb 201816.4% of 61 movements
Mar 201828.2% of 78 movements
Apr 201823.3% of 86 movements
May 201823.0% of 87 movements
Jun 201821.3% of 89 movements
Jul 201820.8% of 120 movements
Aug 201820.8% of 120 movements
Sep 201829.2% of 72 movements
Oct 201820.5% of 83 movements
Nov 20189.2% of 65 movements
Dec 201833.8% of 65 movements
Jan 20196.2% of 64 movements
Feb 20197.1% of 56 movements
Mar 201927.3% of 66 movements
Apr 201926.3% of 95 movements
May 201911.2% of 98 movements
Jun 201930.0% of 100 movements
Jul 201929.6% of 125 movements
Aug 201933.6% of 122 movements
Sep 201915.7% of 102 movements
Oct 201914.8% of 81 movements
Nov 20198.3% of 72 movements
Dec 201922.8% of 79 movements
Jan 202011.4% of 70 movements
Feb 202022.2% of 63 movements
Mar 202023.5% of 34 movements — small sample, not ranked
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 202116.0% of 25 movements — small sample, not ranked
Jun 2021no events in 29 movements — small sample, not ranked
Jul 202120.8% of 48 movements — small sample, not ranked
Aug 20219.5% of 21 movements — small sample, not ranked
Sep 20214.8% of 21 movements — small sample, not ranked
Oct 20215.7% of 35 movements — small sample, not ranked
Nov 20212.5% of 40 movements — small sample, not ranked
Dec 20217.9% of 38 movements — small sample, not ranked
Jan 202214.3% of 28 movements — small sample, not ranked
Feb 202210.8% of 37 movements — small sample, not ranked
Mar 202211.3% of 62 movements
Apr 202229.6% of 81 movements
May 202210.4% of 77 movements
Jun 202213.9% of 72 movements
Jul 202218.7% of 75 movements
Aug 20225.6% of 89 movements
Sep 202221.3% of 75 movements
Oct 202214.7% of 75 movements
Nov 20225.6% of 72 movements
Dec 202232.0% of 75 movements
Jan 20238.7% of 69 movements
Feb 202317.7% of 62 movements
Mar 202324.1% of 79 movements
Apr 202319.2% of 78 movements
May 202313.7% of 95 movements
Jun 202326.3% of 95 movements
Jul 202319.8% of 96 movements
Aug 202316.0% of 100 movements
Sep 202317.1% of 76 movements
Oct 202343.6% of 94 movements
Nov 202332.8% of 61 movements
Dec 202330.1% of 83 movements
Jan 202428.6% of 77 movements
Feb 202425.0% of 80 movements
Mar 20249.9% of 71 movements
Apr 202429.5% of 95 movements
May 202426.1% of 111 movements
Jun 202424.0% of 96 movements
Jul 202430.7% of 114 movements
Aug 202431.8% of 107 movements
Sep 202445.0% of 109 movements
Oct 202437.1% of 89 movements
Nov 202428.2% of 85 movements
Dec 202426.3% of 95 movements
Jan 202524.0% of 96 movements
Feb 202517.0% of 88 movements
Mar 202512.2% of 98 movements
Apr 202515.8% of 101 movements
May 202516.0% of 94 movements
Jun 202535.5% of 62 movements
Jul 202514.0% of 100 movements
Aug 202517.0% of 94 movements
Sep 202532.6% of 86 movements
Oct 202525.0% of 76 movements
Nov 20258.4% of 83 movements
Dec 202516.5% of 91 movements
Jan 202619.8% of 86 movements
Feb 20269.9% of 81 movements
Mar 202660.3% of 58 movements
Apr 202613.3% of 60 movements
May 202615.6% of 90 movements
Jun 202630.2% of 96 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 2022Arrivals18.7% of 75 movements11.8% across 560 flightsreturned the next month
Summer 2022 breakdown · Jul 2022Departures64.5% of 76 movements27.4% across 556 flightsreturned after 4 months
NATS system failure · Aug 2023Arrivals16.0% of 100 movements17.4% across 960 flightsreturned the next month
NATS system failure · Aug 2023Departures63.0% of 100 movements44.1% across 958 flightsreturned after 6 months
Heathrow fire closure · Mar 2025Arrivals12.2% of 98 movements27.5% across 1,156 flightsreturned the next month
Heathrow fire closure · Mar 2025Departures24.2% of 99 movements52.1% across 1,159 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: Dec, 28.2% across 6 months. Lowest median: Nov, 8.8% 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 nJanFebMarAprMayJunJulAugSepOctNovDec20196.2% of 64 movements7.1% of 56 movements27.3% of 66 movements26.3% of 95 movements11.2% of 98 movements30.0% of 100 movements29.6% of 125 movements33.6% of 122 movements15.7% of 102 movements14.8% of 81 movements8.3% of 72 movements22.8% of 79 movements202011.4% of 70 movements22.2% of 63 movements23.5% of 34 movements †suppressed: 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 movements16.0% of 25 movements †no events in 29 movements †20.8% of 48 movements †9.5% of 21 movements †4.8% of 21 movements †5.7% of 35 movements †2.5% of 40 movements †7.9% of 38 movements †202214.3% of 28 movements †10.8% of 37 movements †11.3% of 62 movements29.6% of 81 movements10.4% of 77 movements13.9% of 72 movements18.7% of 75 movements5.6% of 89 movements21.3% of 75 movements14.7% of 75 movements5.6% of 72 movements32.0% of 75 movements20238.7% of 69 movements17.7% of 62 movements24.1% of 79 movements19.2% of 78 movements13.7% of 95 movements26.3% of 95 movements19.8% of 96 movements16.0% of 100 movements17.1% of 76 movements43.6% of 94 movements32.8% of 61 movements30.1% of 83 movements202428.6% of 77 movements25.0% of 80 movements9.9% of 71 movements29.5% of 95 movements26.1% of 111 movements24.0% of 96 movements30.7% of 114 movements31.8% of 107 movements45.0% of 109 movements37.1% of 89 movements28.2% of 85 movements26.3% of 95 movements202524.0% of 96 movements17.0% of 88 movements12.2% of 98 movements15.8% of 101 movements16.0% of 94 movements35.5% of 62 movements14.0% of 100 movements17.0% of 94 movements32.6% of 86 movements25.0% of 76 movements8.4% of 83 movements16.5% of 91 movements202619.8% of 86 movements9.9% of 81 movements60.3% of 58 movements13.3% of 60 movements15.6% of 90 movements30.2% of 96 movementsno datano datano datano datano datano data
Month-by-month table: median, observed range and sample
MonthMedianObserved rangeSample
Jan19.8%6.2–29.6%7 months, 491 flights
Feb16.4%7.1–25.0%7 months, 465 flights
Mar24.1%9.9–60.3%7 months, 512 flights
Apr23.3%13.3–29.6%7 months, 596 flights
May15.6%10.4–26.1%7 months, 652 flights
Jun26.3%13.9–35.5%7 months, 610 flights
Jul20.3%14.0–30.7%6 months, 630 flights
Aug18.9%5.6–33.6%6 months, 632 flights
Sep25.2%15.7–45.0%6 months, 520 flights
Oct22.7%14.7–43.6%6 months, 498 flights
Nov8.8%5.6–32.8%6 months, 438 flights
Dec28.2%16.5–33.8%6 months, 488 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 ↔ TEL-AVIV, 17.7% of 628 movements. Highest disruption: LTN ↔ TEL-AVIV, 26.5% of 373 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 optionLhr ↔ Tel-Aviv17.7% of 628 flightsLtn ↔ Tel-Aviv26.5% of 373 flights
All route comparisons and sample flags
RouteDisruptionCancellationsSample flag
Heathrow ↔ Tel Aviv17.7% of 628 movements4.6% of 628 movementsdescriptive comparison
Luton ↔ Tel Aviv26.5% of 373 movements0.3% of 373 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?

2 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
Heathrow17.7% of 628 movementsdescriptive comparison
Luton26.5% of 373 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

21.0% of 1,001 movements arrivals were disrupted, against 46.2% of 1,007 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

0.4% of 1,001 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

El Al appears from Jan 2018 to Jun 2026 with 7,061 arrivals.

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

Archive route pairs: 21.

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?

21.0% of 1,001 movements over July 2025 to June 2026.

How often are they cancelled?

3.0% of 1,001 movements at short notice.

How late is late?

21.0–55.4 minutes; delayed denominator 180–429

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.