UK FLIGHT DELAY INDEX

derived from CAA punctuality statistics for UK reporting airports

How often are these flights late or cancelled?

Latvia

In the twelve months from July 2025 to June 2026, 26.6% of 2,054 movements arriving into the UK were disrupted — more than fifteen minutes late or cancelled at short notice.

Put the other way round, 73.4% of 2,054 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

26.6% of 2,054 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
26.6% of 2,054 movements0.3% of 2,054 movements25.3–55.3 minutes; delayed denominator 540–1,0980.3% of 2,054 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?

0.3% of 2,054 movements passed the three-hour mark.

The ladder shows how many movements crossed each threshold. Cancellations are separate: 0.3% of 2,054 movements.

DelayShare and sampleOne event per movements
More than 15 minutes26.3% of 2,054 movements3.8
More than 30 minutes14.3% of 2,054 movements7.0
More than 60 minutes5.6% of 2,054 movements18.0
More than 120 minutes1.3% of 2,054 movements79.0
More than 180 minutes0.3% of 2,054 movements293.4
More than 360 minutesno events in 2,054 movementsNo observed events; this is not zero risk.
Definitions, denominators and limits

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

Slightly late or occasionally a disaster?

1.3% of 2,054 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 early37818.4%15–1 early57127.8%0–15 late55827.2%16–3024712.0%31–601798.7%61…120884.3%121…180190.9%181…36070.3%>36000.0%D=2,054
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: Aug 2020, 2.6% of 153 movements. Worst month: Jul 2024, 54.4% of 171 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: 23.7%; sample: 2152018Feb 2018: 25.3%; sample: 182Mar 2018: 22.1%; sample: 213Apr 2018: 19.0%; sample: 226May 2018: 17.9%; sample: 235Jun 2018: 27.5%; sample: 236Jul 2018: 27.8%; sample: 252Aug 2018: 21.3%; sample: 253Sep 2018: 17.3%; sample: 231Oct 2018: 20.1%; sample: 224Nov 2018: 16.0%; sample: 194Dec 2018: 27.4%; sample: 201Jan 2019: 25.9%; sample: 2052019Feb 2019: 20.4%; sample: 181Mar 2019: 13.8%; sample: 196Apr 2019: 12.6%; sample: 230May 2019: 15.9%; sample: 232Jun 2019: 24.8%; sample: 234Jul 2019: 21.8%; sample: 248Aug 2019: 32.9%; sample: 249Sep 2019: 30.6%; sample: 232Oct 2019: 32.9%; sample: 225Nov 2019: 6.1%; sample: 179Dec 2019: 17.0%; sample: 235Jan 2020: 9.6%; sample: 2192020Feb 2020: 26.1%; sample: 180Mar 2020: 23.3%; sample: 133Apr 2020: suppressed: fewer than twenty movements×May 2020: suppressed: fewer than twenty movements×Jun 2020: suppressed: fewer than twenty movements×Jul 2020: 3.1%; sample: 128Aug 2020: 2.6%; sample: 153Sep 2020: 3.4%; sample: 145Oct 2020: 4.5%; sample: 111Nov 2020: 3.3%; sample: 60Dec 2020: 40.0%; sample: 60Jan 2021: 30.5%; sample: 592021Feb 2021: suppressed: fewer than twenty movements×Mar 2021: 6.2%; sample: 32Apr 2021: 17.4%; sample: 23May 2021: 5.0%; sample: 40Jun 2021: 3.5%; sample: 113Jul 2021: 9.7%; sample: 155Aug 2021: 10.8%; sample: 204Sep 2021: 8.1%; sample: 198Oct 2021: 10.9%; sample: 193Nov 2021: 15.1%; sample: 172Dec 2021: 39.5%; sample: 177Jan 2022: 27.3%; sample: 1212022Feb 2022: 30.8%; sample: 120Mar 2022: 12.4%; sample: 185Apr 2022: 23.6%; sample: 208May 2022: 30.3%; sample: 234Jun 2022: 38.6%; sample: 236Jul 2022: 44.5%; sample: 227Aug 2022: 37.2%; sample: 215Sep 2022: 39.5%; sample: 215Oct 2022: 41.2%; sample: 216Nov 2022: 21.1%; sample: 194Dec 2022: 51.7%; sample: 201Jan 2023: 32.5%; sample: 2062023Feb 2023: 26.1%; sample: 184Mar 2023: 26.6%; sample: 203Apr 2023: 27.1%; sample: 188May 2023: 24.0%; sample: 196Jun 2023: 40.5%; sample: 200Jul 2023: 38.8%; sample: 209Aug 2023: 33.9%; sample: 218Sep 2023: 30.3%; sample: 198Oct 2023: 32.7%; sample: 202Nov 2023: 25.8%; sample: 163Dec 2023: 48.5%; sample: 194Jan 2024: 31.7%; sample: 1802024Feb 2024: 28.2%; sample: 149Mar 2024: 11.4%; sample: 175Apr 2024: 27.7%; sample: 159May 2024: 28.7%; sample: 164Jun 2024: 39.3%; sample: 163Jul 2024: 54.4%; sample: 171Aug 2024: 49.1%; sample: 167Sep 2024: 43.0%; sample: 158Oct 2024: 32.6%; sample: 175Nov 2024: 18.0%; sample: 205Dec 2024: 36.4%; sample: 214Jan 2025: 30.9%; sample: 1812025Feb 2025: 20.7%; sample: 184Mar 2025: 11.0%; sample: 227Apr 2025: 16.9%; sample: 189May 2025: 18.9%; sample: 196Jun 2025: 27.6%; sample: 185Jul 2025: 32.6%; sample: 187Aug 2025: 32.8%; sample: 186Sep 2025: 40.6%; sample: 187Oct 2025: 26.2%; sample: 191Nov 2025: 25.4%; sample: 169Dec 2025: 35.1%; sample: 185Jan 2026: 30.4%; sample: 1382026Feb 2026: 26.2%; sample: 149Mar 2026: 12.9%; sample: 171Apr 2026: 18.1%; sample: 160May 2026: 8.7%; sample: 161Jun 2026: 26.5%; sample: 170Pandemic regime Jun 2020Summer 2022 breakdown Jul 2022NATS system failure Aug 2023Heathrow fire closure Mar 2025100%0%
Every monthly observation
MonthDisruption on arrivals
Jan 201823.7% of 215 movements
Feb 201825.3% of 182 movements
Mar 201822.1% of 213 movements
Apr 201819.0% of 226 movements
May 201817.9% of 235 movements
Jun 201827.5% of 236 movements
Jul 201827.8% of 252 movements
Aug 201821.3% of 253 movements
Sep 201817.3% of 231 movements
Oct 201820.1% of 224 movements
Nov 201816.0% of 194 movements
Dec 201827.4% of 201 movements
Jan 201925.9% of 205 movements
Feb 201920.4% of 181 movements
Mar 201913.8% of 196 movements
Apr 201912.6% of 230 movements
May 201915.9% of 232 movements
Jun 201924.8% of 234 movements
Jul 201921.8% of 248 movements
Aug 201932.9% of 249 movements
Sep 201930.6% of 232 movements
Oct 201932.9% of 225 movements
Nov 20196.1% of 179 movements
Dec 201917.0% of 235 movements
Jan 20209.6% of 219 movements
Feb 202026.1% of 180 movements
Mar 202023.3% of 133 movements
Apr 2020suppressed: fewer than twenty movements
May 2020suppressed: fewer than twenty movements
Jun 2020suppressed: fewer than twenty movements
Jul 20203.1% of 128 movements
Aug 20202.6% of 153 movements
Sep 20203.4% of 145 movements
Oct 20204.5% of 111 movements
Nov 20203.3% of 60 movements
Dec 202040.0% of 60 movements
Jan 202130.5% of 59 movements
Feb 2021suppressed: fewer than twenty movements
Mar 20216.2% of 32 movements — small sample, not ranked
Apr 202117.4% of 23 movements — small sample, not ranked
May 20215.0% of 40 movements — small sample, not ranked
Jun 20213.5% of 113 movements
Jul 20219.7% of 155 movements
Aug 202110.8% of 204 movements
Sep 20218.1% of 198 movements
Oct 202110.9% of 193 movements
Nov 202115.1% of 172 movements
Dec 202139.5% of 177 movements
Jan 202227.3% of 121 movements
Feb 202230.8% of 120 movements
Mar 202212.4% of 185 movements
Apr 202223.6% of 208 movements
May 202230.3% of 234 movements
Jun 202238.6% of 236 movements
Jul 202244.5% of 227 movements
Aug 202237.2% of 215 movements
Sep 202239.5% of 215 movements
Oct 202241.2% of 216 movements
Nov 202221.1% of 194 movements
Dec 202251.7% of 201 movements
Jan 202332.5% of 206 movements
Feb 202326.1% of 184 movements
Mar 202326.6% of 203 movements
Apr 202327.1% of 188 movements
May 202324.0% of 196 movements
Jun 202340.5% of 200 movements
Jul 202338.8% of 209 movements
Aug 202333.9% of 218 movements
Sep 202330.3% of 198 movements
Oct 202332.7% of 202 movements
Nov 202325.8% of 163 movements
Dec 202348.5% of 194 movements
Jan 202431.7% of 180 movements
Feb 202428.2% of 149 movements
Mar 202411.4% of 175 movements
Apr 202427.7% of 159 movements
May 202428.7% of 164 movements
Jun 202439.3% of 163 movements
Jul 202454.4% of 171 movements
Aug 202449.1% of 167 movements
Sep 202443.0% of 158 movements
Oct 202432.6% of 175 movements
Nov 202418.0% of 205 movements
Dec 202436.4% of 214 movements
Jan 202530.9% of 181 movements
Feb 202520.7% of 184 movements
Mar 202511.0% of 227 movements
Apr 202516.9% of 189 movements
May 202518.9% of 196 movements
Jun 202527.6% of 185 movements
Jul 202532.6% of 187 movements
Aug 202532.8% of 186 movements
Sep 202540.6% of 187 movements
Oct 202526.2% of 191 movements
Nov 202525.4% of 169 movements
Dec 202535.1% of 185 movements
Jan 202630.4% of 138 movements
Feb 202626.2% of 149 movements
Mar 202612.9% of 171 movements
Apr 202618.1% of 160 movements
May 20268.7% of 161 movements
Jun 202626.5% of 170 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 2022Arrivals44.5% of 227 movements21.4% across 2,203 flightsreturned after 4 months
Summer 2022 breakdown · Jul 2022Departures59.7% of 226 movements17.3% across 2,200 flightsreturned after 7 months
NATS system failure · Aug 2023Arrivals33.9% of 218 movements33.9% across 2,427 flightsreturned the next month
NATS system failure · Aug 2023Departures36.3% of 215 movements34.3% across 2,426 flightsreturned after 3 months
Heathrow fire closure · Mar 2025Arrivals11.0% of 227 movements32.7% across 2,116 flightsreturned the next month
Heathrow fire closure · Mar 2025Departures12.7% of 229 movements33.3% across 2,113 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, 35.8% across 6 months. Lowest median: Mar, 12.9% 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 nJanFebMarAprMayJunJulAugSepOctNovDec201925.9% of 205 movements20.4% of 181 movements13.8% of 196 movements12.6% of 230 movements15.9% of 232 movements24.8% of 234 movements21.8% of 248 movements32.9% of 249 movements30.6% of 232 movements32.9% of 225 movements6.1% of 179 movements17.0% of 235 movements20209.6% of 219 movements26.1% of 180 movements23.3% of 133 movementssuppressed: fewer than twenty movementssuppressed: fewer than twenty movementssuppressed: fewer than twenty movements3.1% of 128 movements2.6% of 153 movements3.4% of 145 movements4.5% of 111 movements3.3% of 60 movements40.0% of 60 movements202130.5% of 59 movementssuppressed: fewer than twenty movements6.2% of 32 movements †17.4% of 23 movements †5.0% of 40 movements †3.5% of 113 movements9.7% of 155 movements10.8% of 204 movements8.1% of 198 movements10.9% of 193 movements15.1% of 172 movements39.5% of 177 movements202227.3% of 121 movements30.8% of 120 movements12.4% of 185 movements23.6% of 208 movements30.3% of 234 movements38.6% of 236 movements44.5% of 227 movements37.2% of 215 movements39.5% of 215 movements41.2% of 216 movements21.1% of 194 movements51.7% of 201 movements202332.5% of 206 movements26.1% of 184 movements26.6% of 203 movements27.1% of 188 movements24.0% of 196 movements40.5% of 200 movements38.8% of 209 movements33.9% of 218 movements30.3% of 198 movements32.7% of 202 movements25.8% of 163 movements48.5% of 194 movements202431.7% of 180 movements28.2% of 149 movements11.4% of 175 movements27.7% of 159 movements28.7% of 164 movements39.3% of 163 movements54.4% of 171 movements49.1% of 167 movements43.0% of 158 movements32.6% of 175 movements18.0% of 205 movements36.4% of 214 movements202530.9% of 181 movements20.7% of 184 movements11.0% of 227 movements16.9% of 189 movements18.9% of 196 movements27.6% of 185 movements32.6% of 187 movements32.8% of 186 movements40.6% of 187 movements26.2% of 191 movements25.4% of 169 movements35.1% of 185 movements202630.4% of 138 movements26.2% of 149 movements12.9% of 171 movements18.1% of 160 movements8.7% of 161 movements26.5% of 170 movementsno datano datano datano datano datano data
Month-by-month table: median, observed range and sample
MonthMedianObserved rangeSample
Jan30.4%23.7–32.5%7 months, 1,246 flights
Feb26.1%20.4–30.8%7 months, 1,149 flights
Mar12.9%11.0–26.6%7 months, 1,370 flights
Apr19.0%12.6–27.7%7 months, 1,360 flights
May18.9%8.7–30.3%7 months, 1,418 flights
Jun27.6%24.8–40.5%7 months, 1,424 flights
Jul35.7%21.8–54.4%6 months, 1,294 flights
Aug33.4%21.3–49.1%6 months, 1,288 flights
Sep35.1%17.3–43.0%6 months, 1,221 flights
Oct32.6%20.1–41.2%6 months, 1,233 flights
Nov19.6%6.1–25.8%6 months, 1,104 flights
Dec35.8%17.0–51.7%6 months, 1,230 flights
Definitions, denominators and limits

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

Which routes have the best and worst record?

Lowest disruption: LHR ↔ RIGA, 16.8% of 143 movements. Highest disruption: MAN ↔ RIGA, 48.1% of 208 movements.

The airline table uses this carrier on each route; airport and country tables combine carriers. Each figure is arrivals into its UK airport. Only sufficiently large exact samples enter the ordered comparison.

Observed disruption share by optionLhr ↔ Riga16.8% of 143 flightsEdi ↔ Riga19.7% of 76 flightsStn ↔ Riga21.1% of 674 flightsLba ↔ Riga25.9% of 216 flightsEma ↔ Riga39.6% of 139 flightsMan ↔ Riga48.1% of 208 flights
All route comparisons and sample flags
RouteDisruptionCancellationsSample flag
LHR ↔ RIGA16.8% of 143 movementsno events in 143 movementsdescriptive comparison
EDI ↔ RIGA19.7% of 76 movementsno events in 76 movementsdescriptive comparison
Stansted ↔ Riga21.1% of 674 movements0.9% of 674 movementsdescriptive comparison
Gatwick ↔ Riga25.8% of 589 movementsno events in 589 movementsdescriptive comparison
LBA ↔ RIGA25.9% of 216 movements0.5% of 216 movementsdescriptive comparison
EMA ↔ RIGA39.6% of 139 movementsno events in 139 movementsdescriptive comparison
MAN ↔ RIGA48.1% of 208 movementsno events in 208 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?

7 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
Edinburgh19.7% of 76 movementsdescriptive comparison
East Midlands International39.6% of 139 movementsdescriptive comparison
Leeds Bradford25.9% of 216 movementsdescriptive comparison
Gatwick25.8% of 589 movementsdescriptive comparison
Heathrow16.8% of 143 movementsdescriptive comparison
Manchester48.1% of 208 movementsdescriptive comparison
Stansted21.1% of 674 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

26.6% of 2,054 movements arrivals were disrupted, against 22.3% of 2,053 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

0.3% of 2,054 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

Latvia appears from Jan 2018 to Jun 2026 with 17,926 arrivals.

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

Archive route pairs: 17.

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?

26.6% of 2,054 movements over July 2025 to June 2026.

How often are they cancelled?

0.3% of 2,054 movements at short notice.

How late is late?

25.3–55.3 minutes; delayed denominator 540–1,098

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.