UK FLIGHT DELAY INDEX

derived from CAA punctuality statistics for UK reporting airports

How often are these flights late or cancelled?

Gulf Air

In the twelve months from July 2025 to June 2026, 35.4% of 1,053 movements arriving into the UK were disrupted — more than fifteen minutes late or cancelled at short notice.

Put the other way round, 64.6% of 1,053 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

35.4% of 1,053 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
35.4% of 1,053 movements8.3% of 1,053 movements36.0–74.5 minutes; delayed denominator 286–5651.6% of 1,053 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?

1.6% of 1,053 movements passed the three-hour mark.

The ladder shows how many movements crossed each threshold. Cancellations are separate: 8.3% of 1,053 movements.

DelayShare and sampleOne event per movements
More than 15 minutes27.2% of 1,053 movements3.7
More than 30 minutes14.6% of 1,053 movements6.8
More than 60 minutes6.0% of 1,053 movements16.7
More than 120 minutes2.5% of 1,053 movements40.5
More than 180 minutes1.6% of 1,053 movements61.9
More than 360 minutes0.8% of 1,053 movements131.6
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.

Slightly late or occasionally a disaster?

2.5% of 1,053 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 early807.6%15–1 early32130.5%0–15 late27926.5%16–3013212.5%31–60918.6%61…120373.5%121…18090.9%181…36090.9%>36080.8%D=1,053
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: Feb 2022, 3.6% of 56 movements. Worst month: Mar 2026, 93.4% of 76 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: 41.3%; sample: 632018Feb 2018: 25.0%; sample: 56Mar 2018: 24.2%; sample: 62Apr 2018: 60.0%; sample: 60May 2018: 27.4%; sample: 62Jun 2018: 31.7%; sample: 60Jul 2018: 48.4%; sample: 62Aug 2018: 58.1%; sample: 62Sep 2018: 66.7%; sample: 60Oct 2018: 50.0%; sample: 60Nov 2018: 21.3%; sample: 47Dec 2018: 43.5%; sample: 62Jan 2019: 50.0%; sample: 622019Feb 2019: 30.4%; sample: 56Mar 2019: 51.6%; sample: 62Apr 2019: 75.0%; sample: 60May 2019: 38.7%; sample: 62Jun 2019: 8.3%; sample: 60Jul 2019: 17.7%; sample: 62Aug 2019: 33.9%; sample: 62Sep 2019: 40.0%; sample: 60Oct 2019: 40.3%; sample: 62Nov 2019: 8.3%; sample: 60Dec 2019: 9.7%; sample: 62Jan 2020: 33.9%; sample: 622020Feb 2020: 36.2%; sample: 58Mar 2020: 17.6%; sample: 51Apr 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: 0.0%; sample: 22Nov 2020: 4.3%; sample: 23Dec 2020: 6.1%; sample: 33Jan 2021: 3.2%; sample: 312021Feb 2021: 3.6%; sample: 28Mar 2021: 9.1%; sample: 33Apr 2021: 34.2%; sample: 38May 2021: 21.9%; sample: 32Jun 2021: 12.1%; sample: 58Jul 2021: 11.1%; sample: 45Aug 2021: 25.8%; sample: 62Sep 2021: 20.0%; sample: 60Oct 2021: 19.4%; sample: 62Nov 2021: 5.0%; sample: 60Dec 2021: 9.1%; sample: 66Jan 2022: 14.3%; sample: 632022Feb 2022: 3.6%; sample: 56Mar 2022: 14.7%; sample: 68Apr 2022: 28.3%; sample: 60May 2022: 30.6%; sample: 62Jun 2022: 35.7%; sample: 70Jul 2022: 23.6%; sample: 72Aug 2022: 23.9%; sample: 71Sep 2022: 52.9%; sample: 68Oct 2022: 38.0%; sample: 71Nov 2022: 17.4%; sample: 69Dec 2022: 35.7%; sample: 70Jan 2023: 31.0%; sample: 712023Feb 2023: 21.9%; sample: 64Mar 2023: 19.2%; sample: 73Apr 2023: 26.1%; sample: 69May 2023: 19.0%; sample: 79Jun 2023: 20.3%; sample: 79Jul 2023: 37.5%; sample: 80Aug 2023: 11.2%; sample: 80Sep 2023: 28.6%; sample: 77Oct 2023: 58.0%; sample: 81Nov 2023: 26.9%; sample: 78Dec 2023: 27.2%; sample: 81Jan 2024: 25.3%; sample: 792024Feb 2024: 32.5%; sample: 77Mar 2024: 13.8%; sample: 80Apr 2024: 40.8%; sample: 76May 2024: 26.2%; sample: 80Jun 2024: 20.3%; sample: 79Jul 2024: 24.1%; sample: 83Aug 2024: 47.1%; sample: 87Sep 2024: 23.5%; sample: 81Oct 2024: 59.5%; sample: 84Nov 2024: 8.5%; sample: 82Dec 2024: 20.0%; sample: 85Jan 2025: 25.6%; sample: 862025Feb 2025: 15.8%; sample: 76Mar 2025: 13.6%; sample: 88Apr 2025: 11.7%; sample: 94May 2025: 11.1%; sample: 99Jun 2025: 40.4%; sample: 94Jul 2025: 8.2%; sample: 97Aug 2025: 15.2%; sample: 99Sep 2025: 29.0%; sample: 93Oct 2025: 27.6%; sample: 98Nov 2025: 20.8%; sample: 96Dec 2025: 32.0%; sample: 97Jan 2026: 35.0%; sample: 1002026Feb 2026: 20.5%; sample: 83Mar 2026: 93.4%; sample: 76Apr 2026: 66.7%; sample: 57May 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 201841.3% of 63 movements
Feb 201825.0% of 56 movements
Mar 201824.2% of 62 movements
Apr 201860.0% of 60 movements
May 201827.4% of 62 movements
Jun 201831.7% of 60 movements
Jul 201848.4% of 62 movements
Aug 201858.1% of 62 movements
Sep 201866.7% of 60 movements
Oct 201850.0% of 60 movements
Nov 201821.3% of 47 movements — small sample, not ranked
Dec 201843.5% of 62 movements
Jan 201950.0% of 62 movements
Feb 201930.4% of 56 movements
Mar 201951.6% of 62 movements
Apr 201975.0% of 60 movements
May 201938.7% of 62 movements
Jun 20198.3% of 60 movements
Jul 201917.7% of 62 movements
Aug 201933.9% of 62 movements
Sep 201940.0% of 60 movements
Oct 201940.3% of 62 movements
Nov 20198.3% of 60 movements
Dec 20199.7% of 62 movements
Jan 202033.9% of 62 movements
Feb 202036.2% of 58 movements
Mar 202017.6% of 51 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 2020no events in 22 movements — small sample, not ranked
Nov 20204.3% of 23 movements — small sample, not ranked
Dec 20206.1% of 33 movements — small sample, not ranked
Jan 20213.2% of 31 movements — small sample, not ranked
Feb 20213.6% of 28 movements — small sample, not ranked
Mar 20219.1% of 33 movements — small sample, not ranked
Apr 202134.2% of 38 movements — small sample, not ranked
May 202121.9% of 32 movements — small sample, not ranked
Jun 202112.1% of 58 movements
Jul 202111.1% of 45 movements — small sample, not ranked
Aug 202125.8% of 62 movements
Sep 202120.0% of 60 movements
Oct 202119.4% of 62 movements
Nov 20215.0% of 60 movements
Dec 20219.1% of 66 movements
Jan 202214.3% of 63 movements
Feb 20223.6% of 56 movements
Mar 202214.7% of 68 movements
Apr 202228.3% of 60 movements
May 202230.6% of 62 movements
Jun 202235.7% of 70 movements
Jul 202223.6% of 72 movements
Aug 202223.9% of 71 movements
Sep 202252.9% of 68 movements
Oct 202238.0% of 71 movements
Nov 202217.4% of 69 movements
Dec 202235.7% of 70 movements
Jan 202331.0% of 71 movements
Feb 202321.9% of 64 movements
Mar 202319.2% of 73 movements
Apr 202326.1% of 69 movements
May 202319.0% of 79 movements
Jun 202320.3% of 79 movements
Jul 202337.5% of 80 movements
Aug 202311.2% of 80 movements
Sep 202328.6% of 77 movements
Oct 202358.0% of 81 movements
Nov 202326.9% of 78 movements
Dec 202327.2% of 81 movements
Jan 202425.3% of 79 movements
Feb 202432.5% of 77 movements
Mar 202413.8% of 80 movements
Apr 202440.8% of 76 movements
May 202426.2% of 80 movements
Jun 202420.3% of 79 movements
Jul 202424.1% of 83 movements
Aug 202447.1% of 87 movements
Sep 202423.5% of 81 movements
Oct 202459.5% of 84 movements
Nov 20248.5% of 82 movements
Dec 202420.0% of 85 movements
Jan 202525.6% of 86 movements
Feb 202515.8% of 76 movements
Mar 202513.6% of 88 movements
Apr 202511.7% of 94 movements
May 202511.1% of 99 movements
Jun 202540.4% of 94 movements
Jul 20258.2% of 97 movements
Aug 202515.2% of 99 movements
Sep 202529.0% of 93 movements
Oct 202527.6% of 98 movements
Nov 202520.8% of 96 movements
Dec 202532.0% of 97 movements
Jan 202635.0% of 100 movements
Feb 202620.5% of 83 movements
Mar 202693.4% of 76 movements
Apr 202666.7% of 57 movements
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 2022Arrivals23.6% of 72 movements18.1% across 734 flightsreturned after 4 months
Summer 2022 breakdown · Jul 2022Departures87.3% of 71 movements22.2% across 755 flightsreturned after 7 months
NATS system failure · Aug 2023Arrivals11.2% of 80 movements28.6% across 864 flightsreturned the next month
NATS system failure · Aug 2023Departures36.2% of 80 movements32.1% across 865 flightsreturned after 2 months
Heathrow fire closure · Mar 2025Arrivals13.6% of 88 movements27.1% across 979 flightsreturned the next month
Heathrow fire closure · Mar 2025Departures10.3% of 87 movements25.6% across 980 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: Oct, 45.2% across 6 months. Lowest median: Nov, 19.1% 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 nJanFebMarAprMayJunJulAugSepOctNovDec201950.0% of 62 movements30.4% of 56 movements51.6% of 62 movements75.0% of 60 movements38.7% of 62 movements8.3% of 60 movements17.7% of 62 movements33.9% of 62 movements40.0% of 60 movements40.3% of 62 movements8.3% of 60 movements9.7% of 62 movements202033.9% of 62 movements36.2% of 58 movements17.6% of 51 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 †no events in 22 movements †4.3% of 23 movements †6.1% of 33 movements †20213.2% of 31 movements †3.6% of 28 movements †9.1% of 33 movements †34.2% of 38 movements †21.9% of 32 movements †12.1% of 58 movements11.1% of 45 movements †25.8% of 62 movements20.0% of 60 movements19.4% of 62 movements5.0% of 60 movements9.1% of 66 movements202214.3% of 63 movements3.6% of 56 movements14.7% of 68 movements28.3% of 60 movements30.6% of 62 movements35.7% of 70 movements23.6% of 72 movements23.9% of 71 movements52.9% of 68 movements38.0% of 71 movements17.4% of 69 movements35.7% of 70 movements202331.0% of 71 movements21.9% of 64 movements19.2% of 73 movements26.1% of 69 movements19.0% of 79 movements20.3% of 79 movements37.5% of 80 movements11.2% of 80 movements28.6% of 77 movements58.0% of 81 movements26.9% of 78 movements27.2% of 81 movements202425.3% of 79 movements32.5% of 77 movements13.8% of 80 movements40.8% of 76 movements26.2% of 80 movements20.3% of 79 movements24.1% of 83 movements47.1% of 87 movements23.5% of 81 movements59.5% of 84 movements8.5% of 82 movements20.0% of 85 movements202525.6% of 86 movements15.8% of 76 movements13.6% of 88 movements11.7% of 94 movements11.1% of 99 movements40.4% of 94 movements8.2% of 97 movements15.2% of 99 movements29.0% of 93 movements27.6% of 98 movements20.8% of 96 movements32.0% of 97 movements202635.0% of 100 movements20.5% of 83 movements93.4% of 76 movements66.7% of 57 movements70.4% of 71 movements39.5% of 86 movementsno datano datano datano datano datano data
Month-by-month table: median, observed range and sample
MonthMedianObserved rangeSample
Jan31.0%14.3–50.0%7 months, 524 flights
Feb21.9%3.6–32.5%7 months, 468 flights
Mar19.2%13.6–93.4%7 months, 509 flights
Apr40.8%11.7–75.0%7 months, 476 flights
May27.4%11.1–70.4%7 months, 515 flights
Jun31.7%8.3–40.4%7 months, 528 flights
Jul23.9%8.2–48.4%6 months, 456 flights
Aug28.9%11.2–58.1%6 months, 461 flights
Sep34.5%23.5–66.7%6 months, 439 flights
Oct45.2%27.6–59.5%6 months, 456 flights
Nov19.1%8.3–26.9%6 months, 432 flights
Dec29.6%9.7–43.5%6 months, 457 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 ↔ Bahrain31.8% of 674 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 ↔ Bahrain31.8% of 674 movements6.7% of 674 movementsdescriptive comparison
MAN ↔ BAHRAIN43.9% of 214 movements10.3% of 214 movementsdescriptive comparison
LHR ↔ DAMMAM82.9% of 41 movements — small sample, not ranked22.0% of 41 movements — small sample, not rankedsmall sample; not ranked
Definitions, denominators and limits

Arrivals into UK reporting airports only unless labelled departures. Denominator: operated movements plus short-notice cancellations (M+C). A movement is not a scheduled flight. Unmatched records are data quality, not outcomes. Cells below twenty movements are suppressed; twenty to forty-nine are descriptive and not ranked.

Which UK airports appear in this record?

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
Heathrow34.7% of 715 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

35.4% of 1,053 movements arrivals were disrupted, against 25.8% of 1,058 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

1.6% of 1,053 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

Gulf Air appears from Jan 2018 to Jun 2026 with 6,633 arrivals.

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

Archive route pairs: 12.

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?

35.4% of 1,053 movements over July 2025 to June 2026.

How often are they cancelled?

8.3% of 1,053 movements at short notice.

How late is late?

36.0–74.5 minutes; delayed denominator 286–565

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.