Cancellations on 21 Aug

1. 1 DEN Denver 3.5%of 1143usually 4.0% 40
2. 2 OSL Oslo 6.5%of 383usually 0.9% 25
3. 3 IST Istanbul 2.9%of 842usually 3.2% 24
4. 4 JFK New York 3.2%of 723usually 3.8% 23
5. 5 BOS Boston 3.1%of 646usually 4.2% 20
6. 6 SFO San Francisco 1.0%of 1973usually 0.7% 20
7. 7 EWR New York 2.7%of 587usually 3.6% 16
8. 8 IAD Washington 3.0%of 435usually 4.7% 13
9. 9 DEL New Delhi 0.8%of 1617usually 1.0% 13
10. 10 DCA Washington 2.6%of 465usually 5.7% 12
11. 11 FRA Frankfurt am Main 1.6%of 743usually 1.4% 12
12. 12 SVO Moscow 2.5%of 441usually 1.8% 11
13. 13 DXB Dubai 2.0%of 539usually 1.2% 11
14. 14 AMS Amsterdam 1.6%of 701usually 1.6% 11
15. 15 CLT Charlotte 1.6%of 706usually 1.3% 11
16. 16 ORY Paris 3.0%of 330usually 1.4% 10
17. 17 BOG Bogota 1.7%of 605usually 2.3% 10
18. 18 LAX Los Angeles 1.3%of 760usually 0.9% 10
19. 19 LIM Lima 3.0%of 301usually 4.1% 9
20. 20 ZRH Zurich 2.2%of 406usually 1.1% 9
21. 21 BCN Barcelona 0.5%of 1528usually 1.8% 8
22. 22 YUL Montréal 2.3%of 308usually 3.8% 7
23. 23 YVR Vancouver 1.8%of 388usually 1.9% 7
24. 24 FLL Fort Lauderdale 1.9%of 314usually 2.3% 6
25. 25 JED Jeddah 1.5%of 388usually 1.6% 6
26. 26 LGA New York 1.1%of 565usually 4.0% 6
27. 27 PEK Beijing 0.9%of 704usually 2.8% 6
28. 28 YOW Ottawa 48 departures seen 5
29. 29 CUN Cancún 2.7%of 186usually 1.7% 5
30. 30 NCE Nice 2.4%of 206usually 1.5% 5
31. 31 DPS Kuta 2.1%of 233usually 0.9% 5
32. 32 MEL Melbourne 1.5%of 339usually 1.6% 5
33. 33 TPE Taipei 1.4%of 365usually 3.1% 5
34. 34 JNB Johannesburg 1.2%of 412usually 0.5% 5
35. 35 BOM Mumbai 1.1%of 448usually 2.0% 5
36. 36 KUL Kuala Lumpur 1.0%of 478usually 0.8% 5
37. 37 YYZ Toronto 0.9%of 569usually 3.3% 5
38. 38 CDG Paris 0.7%of 695usually 1.0% 5
39. 39 LHR London 0.7%of 680usually 0.9% 5
40. 40 CHC Christchurch 92 departures seen 4

Ranked by cancelled departures on each airport's own board that day. Orange marks a cancellation rate at least double what that airport usually runs over the past fortnight.

Fri 21 Aug: 615 cancelled of 61,583 tracked (1.0%) across 249 airports

Each bar is one completed day across every airport board that published cancellations that day. Tap a bar for that day's full ranking. The set of counted airports shifts as boards change behaviour, so read the rate alongside the raw count; a gap means we have no usable record for that day. The outlined bar is the day you are viewing.

Some airport boards remove cancelled flights instead of labelling them, so there is no cancellation figure to read at these airports. The busiest of them:

A handful of other boards label routine schedule padding as cancelled, and do so to 15 to 27% of departures every day. Those airports are left out too.