UK FLIGHT DELAY INDEX

derived from CAA punctuality statistics for UK reporting airports

How often are these flights late or cancelled?

BFS ↔ BRISTOL

In the twelve months from July 2025 to June 2026, 20.0% of 881 movements arriving into BFS were disrupted — that is, they landed more than fifteen minutes late or were cancelled at short notice.

Put the other way round, 80.0% of 881 movements arrived on time by the industry's fifteen-minute standard. Severe delays were rarer: about one arrival in every 881 crossed the three-hour mark. Lower is better on every figure on this page. These numbers describe what happened on the route; they are not a prediction for any individual flight.

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

0 operations (0.00%) excluded because their published percentages could not be reconciled to whole numbers. Excluded operations enter neither the numerator nor the denominator. Outcome figures and comparisons are unavailable when the excluded share exceeds fifteen percent.

The four numbers at a glance

In the twelve months from July 2025 to June 2026, 20.0% of 881 movements were disrupted and 0.7% of 881 movements were cancelled at short notice.

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

Disruption shareShort-notice cancellationsAverage delay among delayed flights only — boundsOperations
20.0% of 881 movements0.7% of 881 movements25.6–59.3 min; N of delayed flights=170–360881
Definitions, denominators and limits

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

When it is late, how late is it?

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

Cancellations are counted separately: 0.7% of 881 movements. “One in N” means how many arrivals you would typically see between events at that level.

Delay threshold ladder; count and share of known operations15 min19.3%30 min11.2%60 min5.3%120 min0.7%180 min0.1%360 min0.1%
Delay ladder table: share, movements and one-in-N
DelayShare and nMovementsOne delay in every N operations
>15 min19.3% of 881 movements1705.2
>30 min11.2% of 881 movements998.9
>60 min5.3% of 881 movements4718.7
>120 min0.7% of 881 movements6146.8
>180 min0.1% of 881 movements1881.0
>360 min0.1% of 881 movements1881.0
Definitions, denominators and limits

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

Slightly late, or occasionally a disaster?

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

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

Nine delay buckets, minutes; share of all recorded operations>15 early15517.6%15–1 early36040.9%0–15 late19021.6%16–30718.1%31–60525.9%61…120414.7%121…18050.6%181…36000.0%>36010.1%D=881
Definitions, denominators and limits

Ratio of the long tail to sixteen-to-sixty-minute delays: 0.0081; corpus median 0.0217; 2056 routes in the corpus. The shape is compared conditionally among delays; the class name does not measure absolute frequency. Histogram counts and shares cover all recorded operations including unmatched records; reconstructed uniquely.

Has this route got better or worse since 2018?

Best month: Sep 2021, 1.4% of 73 movements. Worst month: Apr 2019, 100.0% of 72 movements.

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

Monthly disruption share; gaps mean no published dataJan 2018: 21.1%; sample: 762018Feb 2018: 26.0%; sample: 73Mar 2018: 33.8%; sample: 77Apr 2018: 27.0%; sample: 74May 2018: 30.7%; sample: 75Jun 2018: 55.1%; sample: 69Jul 2018: 30.3%; sample: 76Aug 2018: 42.5%; sample: 73Sep 2018: 52.8%; sample: 72Oct 2018: 37.3%; sample: 75Nov 2018: 18.6%; sample: 86Dec 2018: 34.9%; sample: 83Jan 2019: 23.5%; sample: 852019Feb 2019: 19.2%; sample: 78Mar 2019: 25.0%; sample: 84Apr 2019: 100.0%; sample: 72May 2019: 31.2%; sample: 77Jun 2019: 40.5%; sample: 79Jul 2019: 27.3%; sample: 88Aug 2019: 36.0%; sample: 86Sep 2019: 28.1%; sample: 89Oct 2019: 25.3%; sample: 83Nov 2019: 6.0%; sample: 83Dec 2019: 22.6%; sample: 84Jan 2020: 7.1%; sample: 842020Feb 2020: 25.4%; sample: 71Mar 2020: 10.2%; sample: 59Apr 2020: suppressed: fewer than twenty movements×May 2020: suppressed: fewer than twenty movements×Jun 2020: suppressed: fewer than twenty movements×Jul 2020: 0.0%; sample: 31Aug 2020: 0.0%; sample: 44Sep 2020: 0.0%; sample: 40Oct 2020: 0.0%; sample: 47Nov 2020: 0.0%; sample: 20Dec 2020: 11.1%; sample: 45Jan 2021: 18.2%; sample: 222021Feb 2021: suppressed: fewer than twenty movements×Mar 2021: suppressed: fewer than twenty movements×Apr 2021: suppressed: fewer than twenty movements×May 2021: 2.8%; sample: 36Jun 2021: 0.0%; sample: 41Jul 2021: 4.0%; sample: 75Aug 2021: 2.6%; sample: 76Sep 2021: 1.4%; sample: 73Oct 2021: 13.2%; sample: 91Nov 2021: 4.3%; sample: 69Dec 2021: 6.0%; sample: 67Jan 2022: 2.8%; sample: 712022Feb 2022: 14.3%; sample: 63Mar 2022: 4.2%; sample: 71Apr 2022: 24.7%; sample: 73May 2022: 46.7%; sample: 90Jun 2022: 57.0%; sample: 86Jul 2022: 36.7%; sample: 79Aug 2022: 38.8%; sample: 80Sep 2022: 37.3%; sample: 83Oct 2022: 19.8%; sample: 86Nov 2022: 5.8%; sample: 52Dec 2022: 24.1%; sample: 58Jan 2023: 14.0%; sample: 572023Feb 2023: 9.1%; sample: 77Mar 2023: 26.4%; sample: 91Apr 2023: 27.2%; sample: 114May 2023: 32.5%; sample: 120Jun 2023: 45.2%; sample: 115Jul 2023: 39.1%; sample: 110Aug 2023: 44.5%; sample: 110Sep 2023: 36.5%; sample: 115Oct 2023: 30.8%; sample: 120Nov 2023: 10.3%; sample: 68Dec 2023: 19.0%; sample: 79Jan 2024: 15.7%; sample: 512024Feb 2024: 13.8%; sample: 80Mar 2024: 15.6%; sample: 90Apr 2024: 29.7%; sample: 91May 2024: 32.3%; sample: 93Jun 2024: 39.6%; sample: 96Jul 2024: 31.4%; sample: 102Aug 2024: 30.7%; sample: 101Sep 2024: 51.0%; sample: 100Oct 2024: 36.0%; sample: 75Nov 2024: 16.7%; sample: 66Dec 2024: 37.0%; sample: 73Jan 2025: 26.2%; sample: 612025Feb 2025: 29.4%; sample: 68Mar 2025: 12.5%; sample: 72Apr 2025: 19.7%; sample: 71May 2025: 21.1%; sample: 71Jun 2025: 17.8%; sample: 73Jul 2025: 27.8%; sample: 79Aug 2025: 27.8%; sample: 79Sep 2025: 29.5%; sample: 78Oct 2025: 11.8%; sample: 76Nov 2025: 9.8%; sample: 61Dec 2025: 20.5%; sample: 73Jan 2026: 23.0%; sample: 612026Feb 2026: 14.7%; sample: 68Mar 2026: 13.2%; sample: 76Apr 2026: 13.9%; sample: 72May 2026: 14.1%; sample: 78Jun 2026: 30.0%; sample: 80Pandemic regime Jun 2020Summer 2022 breakdown Jul 2022NATS system failure Aug 2023Heathrow fire closure Mar 2025100%0%
Every month since 2018, including gaps and suppressed cells
MonthDisruption on arrivals
Jan 201821.1% of 76 movements
Feb 201826.0% of 73 movements
Mar 201833.8% of 77 movements
Apr 201827.0% of 74 movements
May 201830.7% of 75 movements
Jun 201855.1% of 69 movements
Jul 201830.3% of 76 movements
Aug 201842.5% of 73 movements
Sep 201852.8% of 72 movements
Oct 201837.3% of 75 movements
Nov 201818.6% of 86 movements
Dec 201834.9% of 83 movements
Jan 201923.5% of 85 movements
Feb 201919.2% of 78 movements
Mar 201925.0% of 84 movements
Apr 2019100.0% of 72 movements
May 201931.2% of 77 movements
Jun 201940.5% of 79 movements
Jul 201927.3% of 88 movements
Aug 201936.0% of 86 movements
Sep 201928.1% of 89 movements
Oct 201925.3% of 83 movements
Nov 20196.0% of 83 movements
Dec 201922.6% of 84 movements
Jan 20207.1% of 84 movements
Feb 202025.4% of 71 movements
Mar 202010.2% of 59 movements
Apr 2020suppressed: fewer than twenty movements
May 2020suppressed: fewer than twenty movements
Jun 2020suppressed: fewer than twenty movements
Jul 2020no events in 31 movements — small sample, not ranked
Aug 2020no events in 44 movements — small sample, not ranked
Sep 2020no events in 40 movements — small sample, not ranked
Oct 2020no events in 47 movements — small sample, not ranked
Nov 2020no events in 20 movements — small sample, not ranked
Dec 202011.1% of 45 movements — small sample, not ranked
Jan 202118.2% of 22 movements — small sample, not ranked
Feb 2021suppressed: fewer than twenty movements
Mar 2021suppressed: fewer than twenty movements
Apr 2021suppressed: fewer than twenty movements
May 20212.8% of 36 movements — small sample, not ranked
Jun 2021no events in 41 movements — small sample, not ranked
Jul 20214.0% of 75 movements
Aug 20212.6% of 76 movements
Sep 20211.4% of 73 movements
Oct 202113.2% of 91 movements
Nov 20214.3% of 69 movements
Dec 20216.0% of 67 movements
Jan 20222.8% of 71 movements
Feb 202214.3% of 63 movements
Mar 20224.2% of 71 movements
Apr 202224.7% of 73 movements
May 202246.7% of 90 movements
Jun 202257.0% of 86 movements
Jul 202236.7% of 79 movements
Aug 202238.8% of 80 movements
Sep 202237.3% of 83 movements
Oct 202219.8% of 86 movements
Nov 20225.8% of 52 movements
Dec 202224.1% of 58 movements
Jan 202314.0% of 57 movements
Feb 20239.1% of 77 movements
Mar 202326.4% of 91 movements
Apr 202327.2% of 114 movements
May 202332.5% of 120 movements
Jun 202345.2% of 115 movements
Jul 202339.1% of 110 movements
Aug 202344.5% of 110 movements
Sep 202336.5% of 115 movements
Oct 202330.8% of 120 movements
Nov 202310.3% of 68 movements
Dec 202319.0% of 79 movements
Jan 202415.7% of 51 movements
Feb 202413.8% of 80 movements
Mar 202415.6% of 90 movements
Apr 202429.7% of 91 movements
May 202432.3% of 93 movements
Jun 202439.6% of 96 movements
Jul 202431.4% of 102 movements
Aug 202430.7% of 101 movements
Sep 202451.0% of 100 movements
Oct 202436.0% of 75 movements
Nov 202416.7% of 66 movements
Dec 202437.0% of 73 movements
Jan 202526.2% of 61 movements
Feb 202529.4% of 68 movements
Mar 202512.5% of 72 movements
Apr 202519.7% of 71 movements
May 202521.1% of 71 movements
Jun 202517.8% of 73 movements
Jul 202527.8% of 79 movements
Aug 202527.8% of 79 movements
Sep 202529.5% of 78 movements
Oct 202511.8% of 76 movements
Nov 20259.8% of 61 movements
Dec 202520.5% of 73 movements
Jan 202623.0% of 61 movements
Feb 202614.7% of 68 movements
Mar 202613.2% of 76 movements
Apr 202613.9% of 72 movements
May 202614.1% of 78 movements
Jun 202630.0% of 80 movements

What did the big disruptions actually do here?

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

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

EventDirectionDisruption that monthBaseline beforeReturn to baseline
Pandemic regime · Jun 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 2022Arrivals36.7% of 79 movements15.1% across 905 flightsreturned after 4 months
Summer 2022 breakdown · Jul 2022Departures44.3% of 79 movements18.9% across 902 flightsreturned after 4 months
NATS system failure · Aug 2023Arrivals44.5% of 110 movements26.6% across 1,043 flightsreturned after 3 months
NATS system failure · Aug 2023Departures51.8% of 110 movements32.8% across 1,044 flightsreturned after 3 months
Heathrow fire closure · Mar 2025Arrivals12.5% of 72 movements31.3% across 1,016 flightsreturned the next month
Heathrow fire closure · Mar 2025Departures11.1% of 72 movements32.3% across 1,015 flightsreturned the next month
Definitions, denominators and limits

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

Which time of year has historically been hardest?

June has historically been the hardest month on this route: in a typical June, 40.5% of arrivals were disrupted, measured across 7 Junes in the archive. November has been the calmest, at 10.1% across 6 Novembers.

Even June has ranged from 17.8% to 57.0% in different years, so this is a record of what happened, not a forecast of what will. Lower is better throughout.

Each cell is one calendar month of one year; the number is the share of that month’s arrivals that were disrupted. Darker means worse. A blank cell means no published data, not zero.

Seasonality: calendar month by year; share and nJanFebMarAprMayJunJulAugSepOctNovDec201923.5% of 85 movements19.2% of 78 movements25.0% of 84 movements100.0% of 72 movements31.2% of 77 movements40.5% of 79 movements27.3% of 88 movements36.0% of 86 movements28.1% of 89 movements25.3% of 83 movements6.0% of 83 movements22.6% of 84 movements20207.1% of 84 movements25.4% of 71 movements10.2% of 59 movementssuppressed: fewer than twenty movementssuppressed: fewer than twenty movementssuppressed: fewer than twenty movementsno events in 31 movements †no events in 44 movements †no events in 40 movements †no events in 47 movements †no events in 20 movements †11.1% of 45 movements †202118.2% of 22 movements †suppressed: fewer than twenty movementssuppressed: fewer than twenty movementssuppressed: fewer than twenty movements2.8% of 36 movements †no events in 41 movements †4.0% of 75 movements2.6% of 76 movements1.4% of 73 movements13.2% of 91 movements4.3% of 69 movements6.0% of 67 movements20222.8% of 71 movements14.3% of 63 movements4.2% of 71 movements24.7% of 73 movements46.7% of 90 movements57.0% of 86 movements36.7% of 79 movements38.8% of 80 movements37.3% of 83 movements19.8% of 86 movements5.8% of 52 movements24.1% of 58 movements202314.0% of 57 movements9.1% of 77 movements26.4% of 91 movements27.2% of 114 movements32.5% of 120 movements45.2% of 115 movements39.1% of 110 movements44.5% of 110 movements36.5% of 115 movements30.8% of 120 movements10.3% of 68 movements19.0% of 79 movements202415.7% of 51 movements13.8% of 80 movements15.6% of 90 movements29.7% of 91 movements32.3% of 93 movements39.6% of 96 movements31.4% of 102 movements30.7% of 101 movements51.0% of 100 movements36.0% of 75 movements16.7% of 66 movements37.0% of 73 movements202526.2% of 61 movements29.4% of 68 movements12.5% of 72 movements19.7% of 71 movements21.1% of 71 movements17.8% of 73 movements27.8% of 79 movements27.8% of 79 movements29.5% of 78 movements11.8% of 76 movements9.8% of 61 movements20.5% of 73 movements202623.0% of 61 movements14.7% of 68 movements13.2% of 76 movements13.9% of 72 movements14.1% of 78 movements30.0% of 80 movementsno datano datano datano datano datano data
Month-by-month table: median, observed range and sample
MonthMedianObserved rangeSample
Jan21.1%2.8–26.2%7 months, 462 flights
Feb14.7%9.1–29.4%7 months, 507 flights
Mar15.6%4.2–33.8%7 months, 561 flights
Apr27.0%13.9–100.0%7 months, 567 flights
May31.2%14.1–46.7%7 months, 604 flights
Jun40.5%17.8–57.0%7 months, 598 flights
Jul30.8%27.3–39.1%6 months, 534 flights
Aug37.4%27.8–44.5%6 months, 529 flights
Sep36.9%28.1–52.8%6 months, 537 flights
Oct28.1%11.8–37.3%6 months, 515 flights
Nov10.1%5.8–18.6%6 months, 416 flights
Dec23.4%19.0–37.0%6 months, 450 flights
Definitions, denominators and limits

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

Which airline has the better record here?

Only one carrier published enough flights here to report: Easyjet Uk Ltd, 20.0% of 881 movements disrupted.

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

Observed disruption share by optionEasyjet Uk20.0% of 881 flights
Airline comparison table: operations, cancellations, three-hour delays and data quality
AirlineOperationsDisruptionCancellations>180 minData quality
Eastern Airwayssuppressed: fewer than twenty movementssuppressed: fewer than twenty movementssuppressed: fewer than twenty movementssuppressed: fewer than twenty movementssuppressed
Easyjet Airlinesuppressed: fewer than twenty movementssuppressed: fewer than twenty movementssuppressed: fewer than twenty movementssuppressed: fewer than twenty movementssuppressed
Easyjet Uk88120.0% of 881 movements0.7% of 881 movements0.1% of 881 movementsdescriptive comparison
Jet2.Comsuppressed: fewer than twenty movementssuppressed: fewer than twenty movementssuppressed: fewer than twenty movementssuppressed: fewer than twenty movementssuppressed
Ryanairsuppressed: fewer than twenty movementssuppressed: fewer than twenty movementssuppressed: fewer than twenty movementssuppressed: fewer than twenty movementssuppressed
Titan Airwayssuppressed: fewer than twenty movementssuppressed: fewer than twenty movementssuppressed: fewer than twenty movementssuppressed: fewer than twenty movementssuppressed
Tui Airwayssuppressed: fewer than twenty movementssuppressed: fewer than twenty movementssuppressed: fewer than twenty movementssuppressed: fewer than twenty movementssuppressed

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

Would another UK airport have been better?

Among UK airports flying to this city with enough flights to publish, ABZ had the lowest disruption share at 17.4% of 247 movements and JER the highest at 28.5% of 361 movements. This route sits at 20.0% of 881 movements.

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

Observed disruption share by optionAbz ↔ Bristol17.4% of 247 flightsBhd ↔ Bristol17.7% of 186 flightsEdi ↔ Bristol21.6% of 1,423 flightsGla ↔ Bristol21.5% of 1,027 flightsIom ↔ Bristol22.0% of 59 flightsJer ↔ Bristol28.5% of 361 flightsNcl ↔ Bristol23.6% of 606 flights
Airport comparison table: operations, cancellations, three-hour delays and data quality
Other UK airport to the same cityOperationsDisruptionCancellations>180 minData quality
Abz ↔ Bristol24717.4% of 247 movements4.0% of 247 movementsno events in 247 movementsdescriptive comparison
Bhd ↔ Bristol18617.7% of 186 movementsno events in 186 movementsno events in 186 movementsdescriptive comparison
Bhx ↔ Bristolsuppressed: fewer than twenty movementssuppressed: fewer than twenty movementssuppressed: fewer than twenty movementssuppressed: fewer than twenty movementssuppressed
Boh ↔ Bristolsuppressed: fewer than twenty movementssuppressed: fewer than twenty movementssuppressed: fewer than twenty movementssuppressed: fewer than twenty movementssuppressed
Cwl ↔ Bristolsuppressed: fewer than twenty movementssuppressed: fewer than twenty movementssuppressed: fewer than twenty movementssuppressed: fewer than twenty movementssuppressed
Durham-Tees-Valley ↔ Bristolsuppressed: fewer than twenty movementssuppressed: fewer than twenty movementssuppressed: fewer than twenty movementssuppressed: fewer than twenty movementssuppressed
Edi ↔ Bristol1,42321.6% of 1,423 movements0.7% of 1,423 movements0.4% of 1,423 movementsdescriptive comparison
Ema ↔ Bristolsuppressed: fewer than twenty movementssuppressed: fewer than twenty movementssuppressed: fewer than twenty movementssuppressed: fewer than twenty movementssuppressed
Ext ↔ Bristolsuppressed: fewer than twenty movementssuppressed: fewer than twenty movementssuppressed: fewer than twenty movementssuppressed: fewer than twenty movementssuppressed
Gla ↔ Bristol1,02721.5% of 1,027 movements1.0% of 1,027 movementsno events in 1,027 movementsdescriptive comparison
Iom ↔ Bristol5922.0% of 59 movements3.4% of 59 movementsno events in 59 movementsdescriptive comparison
Jer ↔ Bristol36128.5% of 361 movements1.9% of 361 movements1.1% of 361 movementsdescriptive comparison
Lba ↔ Bristolsuppressed: fewer than twenty movementssuppressed: fewer than twenty movementssuppressed: fewer than twenty movementssuppressed: fewer than twenty movementssuppressed
Lgw ↔ Bristolsuppressed: fewer than twenty movementssuppressed: fewer than twenty movementssuppressed: fewer than twenty movementssuppressed: fewer than twenty movementssuppressed
Lhr ↔ Bristolsuppressed: fewer than twenty movementssuppressed: fewer than twenty movementssuppressed: fewer than twenty movementssuppressed: fewer than twenty movementssuppressed
Lpl ↔ Bristolsuppressed: fewer than twenty movementssuppressed: fewer than twenty movementssuppressed: fewer than twenty movementssuppressed: fewer than twenty movementssuppressed
Ltn ↔ Bristolsuppressed: fewer than twenty movementssuppressed: fewer than twenty movementssuppressed: fewer than twenty movementssuppressed: fewer than twenty movementssuppressed
Man ↔ Bristolsuppressed: fewer than twenty movementssuppressed: fewer than twenty movementssuppressed: fewer than twenty movementssuppressed: fewer than twenty movementssuppressed
Mme ↔ Bristolsuppressed: fewer than twenty movementssuppressed: fewer than twenty movementssuppressed: fewer than twenty movementssuppressed: fewer than twenty movementssuppressed
Ncl ↔ Bristol60623.6% of 606 movements1.2% of 606 movementsno events in 606 movementsdescriptive comparison
Sou ↔ Bristolsuppressed: fewer than twenty movementssuppressed: fewer than twenty movementssuppressed: fewer than twenty movementssuppressed: fewer than twenty movementssuppressed
Stn ↔ Bristolsuppressed: fewer than twenty movementssuppressed: fewer than twenty movementssuppressed: fewer than twenty movementssuppressed: fewer than twenty movementssuppressed

Does the direction you are flying change anything?

Yes: arrivals into BFS ran 20.0% of 881 movements disrupted, departures 23.8% of 880 movements.

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

Arrivals and departures side by side
DirectionDisruptionCancellationsOver three hours
Arrivals into BFS20.0% of 881 movements0.7% of 881 movements0.1% of 881 movements
Departures from BFS23.8% of 880 movements0.7% of 880 movements0.9% of 880 movements
Definitions, denominators and limits

CAA conditions on delays and cancellations.

How many flights here crossed the three-hour mark?

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

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

DirectionWindowFlights over three hoursArithmetic statutory ceiling
ArrivalsWhole archive · Jan 2018–Jun 202623 flights out of 7,32623 × £220 = £5,060
ArrivalsLast 72 months · Jul 2020–Jun 202615 flights out of 5,20615 × £220 = £3,300
DeparturesWhole archive · Jan 2018–Jun 202634 flights out of 7,32534 × £220 = £7,480
DeparturesLast 72 months · Jul 2020–Jun 202626 flights out of 5,19726 × £220 = £5,720
Definitions, denominators and limits

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

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

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

The facts about this route

Route reference table: codes, distance, frequency, archive span
FieldValue
UK airportBELFAST INTERNATIONAL · BFS
Final point / countryBRISTOL / UNITED KINGDOM
Final point codesBRS / EGGD
Great-circle distance433 km
Maximum statutory amount for the band£220
Average operated arrivals per day2.40
Presence in the latest twelve-month windowoperations present in every month of the latest twelve-month window
First and last active monthJan 2018–Jun 2026
Months with operations in the archive100

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

What this data cannot tell you

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

0 operations (0.00%) excluded because their published percentages could not be reconciled to whole numbers. Excluded operations enter neither the numerator nor the denominator. Outcome figures and comparisons are unavailable when the excluded share exceeds fifteen percent.

Data-quality counters for this route

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

Unmatched records: 0; all recorded operations: 881; excluded by quarantine: 0.

Quick answers

How often is this route disrupted?

20.0% of 881 movements over July 2025 to June 2026. Arrivals into the UK airport; all published carriers.

How many flights are cancelled at short notice?

0.7% of 881 movements in the same window.

How many delays crossed three hours?

0.1% of 881 movements in the same window; these are observed movements, not a count of claims.

What does the delay distribution look like?

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

What distance is used?

433 km, great-circle.

Can compensation entitlement be established here?

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

Why do some cells say "no data"?

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

How this was calculated

Dataset version, input hashes and reconstruction rules

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

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

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

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Reconstruction and formulas

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