UK FLIGHT DELAY INDEX

derived from CAA punctuality statistics for UK reporting airports

How often are these flights late or cancelled?

Bahrain

In the twelve months from July 2025 to June 2026, 33.4% of 1,184 movements arriving into the UK were disrupted — more than fifteen minutes late or cancelled at short notice.

Put the other way round, 66.6% of 1,184 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

33.4% of 1,184 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
33.4% of 1,184 movements7.7% of 1,184 movements33.1–72.1 minutes; delayed denominator 304–6301.3% of 1,184 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?

1.3% of 1,184 movements passed the three-hour mark.

The ladder shows how many movements crossed each threshold. Cancellations are separate: 7.7% of 1,184 movements.

DelayShare and sampleOne event per movements
More than 15 minutes25.7% of 1,184 movements3.9
More than 30 minutes13.6% of 1,184 movements7.4
More than 60 minutes5.5% of 1,184 movements18.2
More than 120 minutes2.1% of 1,184 movements47.4
More than 180 minutes1.3% of 1,184 movements78.9
More than 360 minutes0.7% of 1,184 movements148.0
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?

2.1% of 1,184 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 early877.3%15–1 early37631.8%0–15 late32627.5%16–3014312.1%31–60968.1%61…120403.4%121…180100.8%181…36070.6%>36080.7%D=1,184
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: Jun 2019, 5.6% of 90 movements. Worst month: Mar 2026, 100.0% of 62 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: 35.8%; sample: 952018Feb 2018: 17.9%; sample: 84Mar 2018: 17.2%; sample: 93Apr 2018: 42.2%; sample: 90May 2018: 19.4%; sample: 93Jun 2018: 22.2%; sample: 90Jul 2018: 32.3%; sample: 93Aug 2018: 40.9%; sample: 93Sep 2018: 47.8%; sample: 90Oct 2018: 34.1%; sample: 91Nov 2018: 13.0%; sample: 77Dec 2018: 30.1%; sample: 93Jan 2019: 34.4%; sample: 932019Feb 2019: 20.2%; sample: 84Mar 2019: 35.1%; sample: 94Apr 2019: 50.0%; sample: 90May 2019: 25.8%; sample: 93Jun 2019: 5.6%; sample: 90Jul 2019: 12.9%; sample: 93Aug 2019: 22.6%; sample: 93Sep 2019: 30.7%; sample: 88Oct 2019: 28.0%; sample: 93Nov 2019: 6.7%; sample: 90Dec 2019: 9.5%; sample: 63Jan 2020: 33.9%; sample: 622020Feb 2020: 36.2%; sample: 58Mar 2020: 21.2%; sample: 52Apr 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: 15.0%; sample: 20Oct 2020: 8.6%; sample: 35Nov 2020: 3.6%; sample: 28Dec 2020: 6.8%; sample: 44Jan 2021: 6.8%; sample: 442021Feb 2021: 2.5%; sample: 40Mar 2021: 11.8%; sample: 51Apr 2021: 29.4%; sample: 51May 2021: 20.0%; sample: 45Jun 2021: 13.6%; sample: 66Jul 2021: 10.2%; sample: 49Aug 2021: 22.2%; sample: 72Sep 2021: 16.7%; sample: 72Oct 2021: 17.1%; sample: 76Nov 2021: 7.4%; sample: 81Dec 2021: 10.5%; sample: 86Jan 2022: 15.7%; sample: 832022Feb 2022: 5.6%; sample: 72Mar 2022: 13.2%; sample: 91Apr 2022: 22.9%; sample: 83May 2022: 21.7%; sample: 92Jun 2022: 34.1%; sample: 88Jul 2022: 23.5%; sample: 85Aug 2022: 21.4%; sample: 84Sep 2022: 46.9%; sample: 81Oct 2022: 36.9%; sample: 84Nov 2022: 15.6%; sample: 90Dec 2022: 33.3%; sample: 93Jan 2023: 24.7%; sample: 972023Feb 2023: 18.5%; sample: 92Mar 2023: 14.9%; sample: 101Apr 2023: 21.3%; sample: 94May 2023: 17.4%; sample: 109Jun 2023: 16.5%; sample: 109Jul 2023: 29.7%; sample: 111Aug 2023: 10.8%; sample: 111Sep 2023: 23.4%; sample: 107Oct 2023: 47.3%; sample: 112Nov 2023: 23.6%; sample: 106Dec 2023: 27.7%; sample: 112Jan 2024: 21.8%; sample: 1102024Feb 2024: 25.5%; sample: 106Mar 2024: 11.7%; sample: 103Apr 2024: 45.7%; sample: 105May 2024: 25.2%; sample: 111Jun 2024: 28.4%; sample: 109Jul 2024: 35.1%; sample: 114Aug 2024: 55.1%; sample: 118Sep 2024: 31.5%; sample: 111Oct 2024: 63.2%; sample: 114Nov 2024: 8.9%; sample: 112Dec 2024: 20.0%; sample: 115Jan 2025: 22.2%; sample: 1172025Feb 2025: 15.4%; sample: 104Mar 2025: 11.5%; sample: 104Apr 2025: 12.1%; sample: 107May 2025: 10.7%; sample: 112Jun 2025: 40.6%; sample: 101Jul 2025: 8.6%; sample: 105Aug 2025: 13.4%; sample: 112Sep 2025: 27.4%; sample: 106Oct 2025: 25.4%; sample: 114Nov 2025: 19.0%; sample: 126Dec 2025: 26.6%; sample: 128Jan 2026: 39.8%; sample: 1282026Feb 2026: 34.3%; sample: 108Mar 2026: 100.0%; sample: 62Apr 2026: 55.3%; sample: 38May 2026: 70.4%; sample: 71Jun 2026: 39.5%; sample: 86Pandemic regime Jun 2020Summer 2022 breakdown Jul 2022NATS system failure Aug 2023Heathrow fire closure Mar 2025100%0%
Every monthly observation
MonthDisruption on arrivals
Jan 201835.8% of 95 movements
Feb 201817.9% of 84 movements
Mar 201817.2% of 93 movements
Apr 201842.2% of 90 movements
May 201819.4% of 93 movements
Jun 201822.2% of 90 movements
Jul 201832.3% of 93 movements
Aug 201840.9% of 93 movements
Sep 201847.8% of 90 movements
Oct 201834.1% of 91 movements
Nov 201813.0% of 77 movements
Dec 201830.1% of 93 movements
Jan 201934.4% of 93 movements
Feb 201920.2% of 84 movements
Mar 201935.1% of 94 movements
Apr 201950.0% of 90 movements
May 201925.8% of 93 movements
Jun 20195.6% of 90 movements
Jul 201912.9% of 93 movements
Aug 201922.6% of 93 movements
Sep 201930.7% of 88 movements
Oct 201928.0% of 93 movements
Nov 20196.7% of 90 movements
Dec 20199.5% of 63 movements
Jan 202033.9% of 62 movements
Feb 202036.2% of 58 movements
Mar 202021.2% of 52 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 202015.0% of 20 movements — small sample, not ranked
Oct 20208.6% of 35 movements — small sample, not ranked
Nov 20203.6% of 28 movements — small sample, not ranked
Dec 20206.8% of 44 movements — small sample, not ranked
Jan 20216.8% of 44 movements — small sample, not ranked
Feb 20212.5% of 40 movements — small sample, not ranked
Mar 202111.8% of 51 movements
Apr 202129.4% of 51 movements
May 202120.0% of 45 movements — small sample, not ranked
Jun 202113.6% of 66 movements
Jul 202110.2% of 49 movements — small sample, not ranked
Aug 202122.2% of 72 movements
Sep 202116.7% of 72 movements
Oct 202117.1% of 76 movements
Nov 20217.4% of 81 movements
Dec 202110.5% of 86 movements
Jan 202215.7% of 83 movements
Feb 20225.6% of 72 movements
Mar 202213.2% of 91 movements
Apr 202222.9% of 83 movements
May 202221.7% of 92 movements
Jun 202234.1% of 88 movements
Jul 202223.5% of 85 movements
Aug 202221.4% of 84 movements
Sep 202246.9% of 81 movements
Oct 202236.9% of 84 movements
Nov 202215.6% of 90 movements
Dec 202233.3% of 93 movements
Jan 202324.7% of 97 movements
Feb 202318.5% of 92 movements
Mar 202314.9% of 101 movements
Apr 202321.3% of 94 movements
May 202317.4% of 109 movements
Jun 202316.5% of 109 movements
Jul 202329.7% of 111 movements
Aug 202310.8% of 111 movements
Sep 202323.4% of 107 movements
Oct 202347.3% of 112 movements
Nov 202323.6% of 106 movements
Dec 202327.7% of 112 movements
Jan 202421.8% of 110 movements
Feb 202425.5% of 106 movements
Mar 202411.7% of 103 movements
Apr 202445.7% of 105 movements
May 202425.2% of 111 movements
Jun 202428.4% of 109 movements
Jul 202435.1% of 114 movements
Aug 202455.1% of 118 movements
Sep 202431.5% of 111 movements
Oct 202463.2% of 114 movements
Nov 20248.9% of 112 movements
Dec 202420.0% of 115 movements
Jan 202522.2% of 117 movements
Feb 202515.4% of 104 movements
Mar 202511.5% of 104 movements
Apr 202512.1% of 107 movements
May 202510.7% of 112 movements
Jun 202540.6% of 101 movements
Jul 20258.6% of 105 movements
Aug 202513.4% of 112 movements
Sep 202527.4% of 106 movements
Oct 202525.4% of 114 movements
Nov 202519.0% of 126 movements
Dec 202526.6% of 128 movements
Jan 202639.8% of 128 movements
Feb 202634.3% of 108 movements
Mar 2026100.0% of 62 movements
Apr 202655.3% of 38 movements — small sample, not ranked
May 202670.4% of 71 movements
Jun 202639.5% of 86 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 2022Arrivals23.5% of 85 movements16.4% across 945 flightsreturned after 4 months
Summer 2022 breakdown · Jul 2022Departures82.1% of 84 movements25.3% across 966 flightsreturned after 7 months
NATS system failure · Aug 2023Arrivals10.8% of 111 movements24.8% across 1,145 flightsreturned the next month
NATS system failure · Aug 2023Departures45.9% of 111 movements38.6% across 1,147 flightsreturned the next month
Heathrow fire closure · Mar 2025Arrivals11.5% of 104 movements30.2% across 1,333 flightsreturned the next month
Heathrow fire closure · Mar 2025Departures15.4% of 104 movements31.4% across 1,333 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: Apr, 42.2% across 7 months. Lowest median: Nov, 14.3% 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 nJanFebMarAprMayJunJulAugSepOctNovDec201934.4% of 93 movements20.2% of 84 movements35.1% of 94 movements50.0% of 90 movements25.8% of 93 movements5.6% of 90 movements12.9% of 93 movements22.6% of 93 movements30.7% of 88 movements28.0% of 93 movements6.7% of 90 movements9.5% of 63 movements202033.9% of 62 movements36.2% of 58 movements21.2% of 52 movementssuppressed: fewer than twenty movementssuppressed: fewer than twenty movementssuppressed: fewer than twenty movementssuppressed: fewer than twenty movementssuppressed: fewer than twenty movements15.0% of 20 movements †8.6% of 35 movements †3.6% of 28 movements †6.8% of 44 movements †20216.8% of 44 movements †2.5% of 40 movements †11.8% of 51 movements29.4% of 51 movements20.0% of 45 movements †13.6% of 66 movements10.2% of 49 movements †22.2% of 72 movements16.7% of 72 movements17.1% of 76 movements7.4% of 81 movements10.5% of 86 movements202215.7% of 83 movements5.6% of 72 movements13.2% of 91 movements22.9% of 83 movements21.7% of 92 movements34.1% of 88 movements23.5% of 85 movements21.4% of 84 movements46.9% of 81 movements36.9% of 84 movements15.6% of 90 movements33.3% of 93 movements202324.7% of 97 movements18.5% of 92 movements14.9% of 101 movements21.3% of 94 movements17.4% of 109 movements16.5% of 109 movements29.7% of 111 movements10.8% of 111 movements23.4% of 107 movements47.3% of 112 movements23.6% of 106 movements27.7% of 112 movements202421.8% of 110 movements25.5% of 106 movements11.7% of 103 movements45.7% of 105 movements25.2% of 111 movements28.4% of 109 movements35.1% of 114 movements55.1% of 118 movements31.5% of 111 movements63.2% of 114 movements8.9% of 112 movements20.0% of 115 movements202522.2% of 117 movements15.4% of 104 movements11.5% of 104 movements12.1% of 107 movements10.7% of 112 movements40.6% of 101 movements8.6% of 105 movements13.4% of 112 movements27.4% of 106 movements25.4% of 114 movements19.0% of 126 movements26.6% of 128 movements202639.8% of 128 movements34.3% of 108 movements100.0% of 62 movements55.3% of 38 movements †70.4% of 71 movements39.5% of 86 movementsno datano datano datano datano datano data
Month-by-month table: median, observed range and sample
MonthMedianObserved rangeSample
Jan24.7%15.7–39.8%7 months, 723 flights
Feb18.5%5.6–34.3%7 months, 650 flights
Mar14.9%11.5–100.0%7 months, 648 flights
Apr42.2%12.1–55.3%7 months, 607 flights
May21.7%10.7–70.4%7 months, 681 flights
Jun28.4%5.6–40.6%7 months, 673 flights
Jul26.6%8.6–35.1%6 months, 601 flights
Aug22.0%10.8–55.1%6 months, 611 flights
Sep31.1%23.4–47.8%6 months, 583 flights
Oct35.5%25.4–63.2%6 months, 608 flights
Nov14.3%6.7–23.6%6 months, 601 flights
Dec27.1%9.5–33.3%6 months, 604 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: LGW ↔ BAHRAIN, 25.2% of 123 movements. Highest disruption: MAN ↔ BAHRAIN, 43.9% of 214 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 optionLgw ↔ Bahrain25.2% of 123 flightsLhr ↔ Bahrain31.9% of 846 flightsMan ↔ Bahrain43.9% of 214 flights
All route comparisons and sample flags
RouteDisruptionCancellationsSample flag
LGW ↔ BAHRAIN25.2% of 123 movements8.9% of 123 movementsdescriptive comparison
Heathrow ↔ Bahrain31.9% of 846 movements6.9% of 846 movementsdescriptive comparison
MAN ↔ BAHRAIN43.9% of 214 movements10.3% of 214 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?

3 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
Gatwick25.2% of 123 movementsdescriptive comparison
Heathrow31.9% of 846 movementsdescriptive comparison
Manchester43.9% of 214 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

33.4% of 1,184 movements arrivals were disrupted, against 25.7% of 1,181 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

1.3% of 1,184 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

Bahrain appears from Jan 2018 to Jun 2026 with 8,695 arrivals.

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

Archive route pairs: 6.

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?

33.4% of 1,184 movements over July 2025 to June 2026.

How often are they cancelled?

7.7% of 1,184 movements at short notice.

How late is late?

33.1–72.1 minutes; delayed denominator 304–630

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.