UK FLIGHT DELAY INDEX

derived from CAA punctuality statistics for UK reporting airports

How often are these flights late or cancelled?

Sweden

In the twelve months from July 2025 to June 2026, 19.4% of 7,210 movements arriving into the UK were disrupted — more than fifteen minutes late or cancelled at short notice.

Put the other way round, 80.6% of 7,210 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

19.4% of 7,210 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
19.4% of 7,210 movements0.7% of 7,210 movements20.9–55.5 minutes; delayed denominator 1,351–3,2470.2% of 7,210 movements
Definitions, denominators and limits

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

When late, how late?

0.2% of 7,210 movements passed the three-hour mark.

The ladder shows how many movements crossed each threshold. Cancellations are separate: 0.7% of 7,210 movements.

DelayShare and sampleOne event per movements
More than 15 minutes18.7% of 7,210 movements5.3
More than 30 minutes9.5% of 7,210 movements10.5
More than 60 minutes3.1% of 7,210 movements32.0
More than 120 minutes0.7% of 7,210 movements133.5
More than 180 minutes0.2% of 7,210 movements400.6
More than 360 minutes0.0% of 7,210 movements2,403.3
Definitions, denominators and limits

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

Slightly late or occasionally a disaster?

0.7% of 7,210 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 early1,15016.0%15–1 early2,76238.3%0–15 late1,89626.3%16–306659.2%31–604616.4%61…1201712.4%121…180360.5%181…360150.2%>36030.0%D=7,210
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: Jul 2020, 4.7% of 129 movements. Worst month: Dec 2023, 55.7% of 664 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: 30.2%; sample: 8592018Feb 2018: 27.0%; sample: 797Mar 2018: 31.4%; sample: 869Apr 2018: 29.9%; sample: 896May 2018: 22.3%; sample: 910Jun 2018: 31.1%; sample: 859Jul 2018: 33.9%; sample: 843Aug 2018: 31.3%; sample: 876Sep 2018: 30.6%; sample: 833Oct 2018: 33.1%; sample: 897Nov 2018: 26.1%; sample: 829Dec 2018: 38.2%; sample: 828Jan 2019: 18.7%; sample: 7772019Feb 2019: 33.2%; sample: 753Mar 2019: 27.2%; sample: 854Apr 2019: 19.1%; sample: 827May 2019: 18.1%; sample: 846Jun 2019: 35.1%; sample: 801Jul 2019: 31.4%; sample: 809Aug 2019: 33.4%; sample: 835Sep 2019: 30.1%; sample: 795Oct 2019: 29.7%; sample: 812Nov 2019: 15.8%; sample: 742Dec 2019: 25.9%; sample: 742Jan 2020: 19.4%; sample: 7152020Feb 2020: 39.6%; sample: 707Mar 2020: 12.5%; sample: 521Apr 2020: suppressed: fewer than twenty movements×May 2020: suppressed: fewer than twenty movements×Jun 2020: 3.0%; sample: 33Jul 2020: 4.7%; sample: 129Aug 2020: 7.9%; sample: 165Sep 2020: 5.0%; sample: 141Oct 2020: 5.9%; sample: 203Nov 2020: 6.2%; sample: 113Dec 2020: 22.3%; sample: 130Jan 2021: 34.7%; sample: 752021Feb 2021: suppressed: fewer than twenty movements×Mar 2021: 4.5%; sample: 22Apr 2021: 26.9%; sample: 26May 2021: 5.6%; sample: 36Jun 2021: 16.5%; sample: 79Jul 2021: 9.0%; sample: 155Aug 2021: 12.8%; sample: 179Sep 2021: 6.5%; sample: 231Oct 2021: 24.3%; sample: 251Nov 2021: 18.1%; sample: 309Dec 2021: 34.9%; sample: 352Jan 2022: 23.5%; sample: 2722022Feb 2022: 25.9%; sample: 270Mar 2022: 16.7%; sample: 407Apr 2022: 23.2%; sample: 616May 2022: 26.2%; sample: 682Jun 2022: 40.0%; sample: 582Jul 2022: 29.3%; sample: 557Aug 2022: 27.5%; sample: 574Sep 2022: 31.8%; sample: 560Oct 2022: 28.0%; sample: 601Nov 2022: 24.3%; sample: 655Dec 2022: 49.2%; sample: 658Jan 2023: 32.7%; sample: 6202023Feb 2023: 23.2%; sample: 577Mar 2023: 33.5%; sample: 678Apr 2023: 17.3%; sample: 655May 2023: 15.6%; sample: 672Jun 2023: 32.2%; sample: 640Jul 2023: 33.0%; sample: 672Aug 2023: 33.3%; sample: 672Sep 2023: 41.5%; sample: 661Oct 2023: 33.1%; sample: 729Nov 2023: 27.7%; sample: 647Dec 2023: 55.7%; sample: 664Jan 2024: 33.6%; sample: 6042024Feb 2024: 29.6%; sample: 608Mar 2024: 21.5%; sample: 670Apr 2024: 26.8%; sample: 650May 2024: 21.3%; sample: 695Jun 2024: 30.8%; sample: 616Jul 2024: 35.1%; sample: 659Aug 2024: 34.3%; sample: 671Sep 2024: 34.1%; sample: 637Oct 2024: 28.5%; sample: 694Nov 2024: 19.6%; sample: 561Dec 2024: 36.0%; sample: 584Jan 2025: 28.1%; sample: 5162025Feb 2025: 14.4%; sample: 521Mar 2025: 13.5%; sample: 593Apr 2025: 10.9%; sample: 579May 2025: 11.2%; sample: 606Jun 2025: 21.2%; sample: 600Jul 2025: 17.5%; sample: 623Aug 2025: 16.4%; sample: 621Sep 2025: 31.7%; sample: 599Oct 2025: 18.2%; sample: 632Nov 2025: 15.7%; sample: 553Dec 2025: 26.1%; sample: 614Jan 2026: 29.6%; sample: 5002026Feb 2026: 14.9%; sample: 511Mar 2026: 11.0%; sample: 591Apr 2026: 13.3%; sample: 655May 2026: 13.9%; sample: 669Jun 2026: 26.5%; sample: 642Pandemic regime Jun 2020Summer 2022 breakdown Jul 2022NATS system failure Aug 2023Heathrow fire closure Mar 2025100%0%
Every monthly observation
MonthDisruption on arrivals
Jan 201830.2% of 859 movements
Feb 201827.0% of 797 movements
Mar 201831.4% of 869 movements
Apr 201829.9% of 896 movements
May 201822.3% of 910 movements
Jun 201831.1% of 859 movements
Jul 201833.9% of 843 movements
Aug 201831.3% of 876 movements
Sep 201830.6% of 833 movements
Oct 201833.1% of 897 movements
Nov 201826.1% of 829 movements
Dec 201838.2% of 828 movements
Jan 201918.7% of 777 movements
Feb 201933.2% of 753 movements
Mar 201927.2% of 854 movements
Apr 201919.1% of 827 movements
May 201918.1% of 846 movements
Jun 201935.1% of 801 movements
Jul 201931.4% of 809 movements
Aug 201933.4% of 835 movements
Sep 201930.1% of 795 movements
Oct 201929.7% of 812 movements
Nov 201915.8% of 742 movements
Dec 201925.9% of 742 movements
Jan 202019.4% of 715 movements
Feb 202039.6% of 707 movements
Mar 202012.5% of 521 movements
Apr 2020suppressed: fewer than twenty movements
May 2020suppressed: fewer than twenty movements
Jun 20203.0% of 33 movements — small sample, not ranked
Jul 20204.7% of 129 movements
Aug 20207.9% of 165 movements
Sep 20205.0% of 141 movements
Oct 20205.9% of 203 movements
Nov 20206.2% of 113 movements
Dec 202022.3% of 130 movements
Jan 202134.7% of 75 movements
Feb 2021suppressed: fewer than twenty movements
Mar 20214.5% of 22 movements — small sample, not ranked
Apr 202126.9% of 26 movements — small sample, not ranked
May 20215.6% of 36 movements — small sample, not ranked
Jun 202116.5% of 79 movements
Jul 20219.0% of 155 movements
Aug 202112.8% of 179 movements
Sep 20216.5% of 231 movements
Oct 202124.3% of 251 movements
Nov 202118.1% of 309 movements
Dec 202134.9% of 352 movements
Jan 202223.5% of 272 movements
Feb 202225.9% of 270 movements
Mar 202216.7% of 407 movements
Apr 202223.2% of 616 movements
May 202226.2% of 682 movements
Jun 202240.0% of 582 movements
Jul 202229.3% of 557 movements
Aug 202227.5% of 574 movements
Sep 202231.8% of 560 movements
Oct 202228.0% of 601 movements
Nov 202224.3% of 655 movements
Dec 202249.2% of 658 movements
Jan 202332.7% of 620 movements
Feb 202323.2% of 577 movements
Mar 202333.5% of 678 movements
Apr 202317.3% of 655 movements
May 202315.6% of 672 movements
Jun 202332.2% of 640 movements
Jul 202333.0% of 672 movements
Aug 202333.3% of 672 movements
Sep 202341.5% of 661 movements
Oct 202333.1% of 729 movements
Nov 202327.7% of 647 movements
Dec 202355.7% of 664 movements
Jan 202433.6% of 604 movements
Feb 202429.6% of 608 movements
Mar 202421.5% of 670 movements
Apr 202426.8% of 650 movements
May 202421.3% of 695 movements
Jun 202430.8% of 616 movements
Jul 202435.1% of 659 movements
Aug 202434.3% of 671 movements
Sep 202434.1% of 637 movements
Oct 202428.5% of 694 movements
Nov 202419.6% of 561 movements
Dec 202436.0% of 584 movements
Jan 202528.1% of 516 movements
Feb 202514.4% of 521 movements
Mar 202513.5% of 593 movements
Apr 202510.9% of 579 movements
May 202511.2% of 606 movements
Jun 202521.2% of 600 movements
Jul 202517.5% of 623 movements
Aug 202516.4% of 621 movements
Sep 202531.7% of 599 movements
Oct 202518.2% of 632 movements
Nov 202515.7% of 553 movements
Dec 202526.1% of 614 movements
Jan 202629.6% of 500 movements
Feb 202614.9% of 511 movements
Mar 202611.0% of 591 movements
Apr 202613.3% of 655 movements
May 202613.9% of 669 movements
Jun 202626.5% of 642 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 2020Arrivals3.0% of 33 movements — small sample, not rankedno complete baselinenot enough data: needs a complete baseline and a publishable event month
Pandemic regime · Jun 2020Departures9.1% of 33 movements — small sample, not rankedno complete baselinenot enough data: needs a complete baseline and a publishable event month
Summer 2022 breakdown · Jul 2022Arrivals29.3% of 557 movements21.8% across 4,306 flightsstill above it 8 months later
Summer 2022 breakdown · Jul 2022Departures43.4% of 564 movements21.9% across 4,319 flightsstill above it 8 months later
NATS system failure · Aug 2023Arrivals33.3% of 672 movements29.0% across 7,562 flightsreturned after 3 months
NATS system failure · Aug 2023Departures41.0% of 671 movements33.8% across 7,652 flightsreturned after 2 months
Heathrow fire closure · Mar 2025Arrivals13.5% of 593 movements27.5% across 7,474 flightsreturned the next month
Heathrow fire closure · Mar 2025Departures16.6% of 597 movements29.1% across 7,473 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, 37.1% across 6 months. Lowest median: May, 18.1% across 7 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 nJanFebMarAprMayJunJulAugSepOctNovDec201918.7% of 777 movements33.2% of 753 movements27.2% of 854 movements19.1% of 827 movements18.1% of 846 movements35.1% of 801 movements31.4% of 809 movements33.4% of 835 movements30.1% of 795 movements29.7% of 812 movements15.8% of 742 movements25.9% of 742 movements202019.4% of 715 movements39.6% of 707 movements12.5% of 521 movementssuppressed: fewer than twenty movementssuppressed: fewer than twenty movements3.0% of 33 movements †4.7% of 129 movements7.9% of 165 movements5.0% of 141 movements5.9% of 203 movements6.2% of 113 movements22.3% of 130 movements202134.7% of 75 movementssuppressed: fewer than twenty movements4.5% of 22 movements †26.9% of 26 movements †5.6% of 36 movements †16.5% of 79 movements9.0% of 155 movements12.8% of 179 movements6.5% of 231 movements24.3% of 251 movements18.1% of 309 movements34.9% of 352 movements202223.5% of 272 movements25.9% of 270 movements16.7% of 407 movements23.2% of 616 movements26.2% of 682 movements40.0% of 582 movements29.3% of 557 movements27.5% of 574 movements31.8% of 560 movements28.0% of 601 movements24.3% of 655 movements49.2% of 658 movements202332.7% of 620 movements23.2% of 577 movements33.5% of 678 movements17.3% of 655 movements15.6% of 672 movements32.2% of 640 movements33.0% of 672 movements33.3% of 672 movements41.5% of 661 movements33.1% of 729 movements27.7% of 647 movements55.7% of 664 movements202433.6% of 604 movements29.6% of 608 movements21.5% of 670 movements26.8% of 650 movements21.3% of 695 movements30.8% of 616 movements35.1% of 659 movements34.3% of 671 movements34.1% of 637 movements28.5% of 694 movements19.6% of 561 movements36.0% of 584 movements202528.1% of 516 movements14.4% of 521 movements13.5% of 593 movements10.9% of 579 movements11.2% of 606 movements21.2% of 600 movements17.5% of 623 movements16.4% of 621 movements31.7% of 599 movements18.2% of 632 movements15.7% of 553 movements26.1% of 614 movements202629.6% of 500 movements14.9% of 511 movements11.0% of 591 movements13.3% of 655 movements13.9% of 669 movements26.5% of 642 movementsno datano datano datano datano datano data
Month-by-month table: median, observed range and sample
MonthMedianObserved rangeSample
Jan29.6%18.7–33.6%7 months, 4,148 flights
Feb25.9%14.4–33.2%7 months, 4,037 flights
Mar21.5%11.0–33.5%7 months, 4,662 flights
Apr19.1%10.9–29.9%7 months, 4,878 flights
May18.1%11.2–26.2%7 months, 5,080 flights
Jun31.1%21.2–40.0%7 months, 4,740 flights
Jul32.2%17.5–35.1%6 months, 4,163 flights
Aug32.3%16.4–34.3%6 months, 4,249 flights
Sep31.8%30.1–41.5%6 months, 4,085 flights
Oct29.1%18.2–33.1%6 months, 4,365 flights
Nov21.9%15.7–27.7%6 months, 3,987 flights
Dec37.1%25.9–55.7%6 months, 4,090 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 ↔ GOTEBORG-LANDVETTER, 10.5% of 95 movements. Highest disruption: EDI ↔ GOTEBORG-LANDVETTER, 33.0% of 94 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 ↔ Goteborg-Landvetter10.5% of 95 flightsLgw ↔ Stockholm-Arlanda15.0% of 921 flightsEdi ↔ Stockholm-Arlanda15.2% of 355 flightsMan ↔ Goteborg-Landvetter28.6% of 234 flightsBhx ↔ Stockholm-Arlanda32.5% of 83 flightsEdi ↔ Goteborg-Landvetter33.0% of 94 flights
All route comparisons and sample flags
RouteDisruptionCancellationsSample flag
LGW ↔ GOTEBORG-LANDVETTER10.5% of 95 movements2.1% of 95 movementsdescriptive comparison
Gatwick ↔ Stockholm (Arlanda)15.0% of 921 movements0.5% of 921 movementsdescriptive comparison
EDI ↔ STOCKHOLM-ARLANDA15.2% of 355 movements1.4% of 355 movementsdescriptive comparison
Heathrow ↔ Stockholm (Arlanda)16.8% of 2,909 movements0.8% of 2,909 movementsdescriptive comparison
STN ↔ VASTERAS17.1% of 105 movementsno events in 105 movementsdescriptive comparison
Heathrow ↔ Goteborg (Landvetter)18.2% of 627 movements0.6% of 627 movementsdescriptive comparison
MAN ↔ STOCKHOLM-ARLANDA20.7% of 420 movements1.9% of 420 movementsdescriptive comparison
Stansted ↔ Stockholm (Arlanda)23.9% of 514 movements0.2% of 514 movementsdescriptive comparison
Stansted ↔ Goteborg (Landvetter)24.9% of 731 movements0.3% of 731 movementsdescriptive comparison
MAN ↔ GOTEBORG-LANDVETTER28.6% of 234 movementsno events in 234 movementsdescriptive comparison
BHX ↔ STOCKHOLM-ARLANDA32.5% of 83 movementsno events in 83 movementsdescriptive comparison
EDI ↔ GOTEBORG-LANDVETTER33.0% of 94 movementsno events in 94 movementsdescriptive comparison
LGW ↔ SCANDINAVIAN-MOUNTAINS-AIRPORT69.7% of 33 movements — small sample, not ranked3.0% of 33 movements — small sample, not rankedsmall sample; not ranked
STN ↔ MALMO11.5% of 26 movements — small sample, not rankedno events in 26 movements — small sample, not rankedsmall sample; not ranked
STN ↔ OREBRO65.4% of 26 movements — small sample, not rankedno events in 26 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?

6 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
Birmingham32.1% of 84 movementsdescriptive comparison
Edinburgh18.9% of 449 movementsdescriptive comparison
Gatwick16.3% of 1,052 movementsdescriptive comparison
Heathrow17.1% of 3,539 movementsdescriptive comparison
Manchester24.2% of 669 movementsdescriptive comparison
Stansted24.5% of 1,402 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

19.4% of 7,210 movements arrivals were disrupted, against 22.5% of 7,208 movements departures.

The directions have separate denominators. A departure delay does not establish late arrival at the final destination; legal conditions differ by direction and carrier.

Definitions, denominators and limits

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

Movements past the three-hour mark

0.2% of 7,210 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

Sweden appears from Jan 2018 to Jun 2026 with 57,101 arrivals.

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

Archive route pairs: 126.

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?

19.4% of 7,210 movements over July 2025 to June 2026.

How often are they cancelled?

0.7% of 7,210 movements at short notice.

How late is late?

20.9–55.5 minutes; delayed denominator 1,351–3,247

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.