Cancellations on 23 Aug

1. 1 OSL Oslo 23.2%of 357usually 2.9% 83
2. 2 YUL Montréal 9.6%of 293usually 3.7% 28
3. 3 YYZ Toronto 3.3%of 577usually 3.4% 19
4. 4 YVR Vancouver 4.6%of 393usually 2.3% 18
5. 5 BOS Boston 2.8%of 641usually 3.7% 18
6. 6 IST Istanbul 2.2%of 832usually 3.0% 18
7. 7 IAD Washington 3.3%of 420usually 4.3% 14
8. 8 DCA Washington 3.5%of 367usually 4.7% 13
9. 9 DEL New Delhi 0.8%of 1571usually 0.9% 13
10. 10 YYC Calgary 3.9%of 281usually 2.1% 11
11. 11 DEN Denver 1.0%of 1068usually 3.8% 11
12. 12 SFO San Francisco 0.6%of 1987usually 0.6% 11
13. 13 ALC Alicante 3.9%of 258usually 0.7% 10
14. 14 PEK Beijing 1.4%of 702usually 2.6% 10
15. 15 ARN Stockholm 2.6%of 313usually 0.8% 8
16. 16 AMS Amsterdam 1.2%of 646usually 1.5% 8
17. 17 PHX Phoenix 1.2%of 679usually 0.9% 8
18. 18 BCN Barcelona 0.5%of 1513usually 1.7% 8
19. 19 FLL Fort Lauderdale 2.2%of 319usually 2.2% 7
20. 20 ORD Chicago 0.5%of 1468usually 0.7% 7
21. 21 CUN Cancún 3.1%of 192usually 2.0% 6
22. 22 BER Berlin 2.6%of 230usually 1.2% 6
23. 23 FUK Fukuoka 2.3%of 264usually 1.8% 6
24. 24 JED Jeddah 1.4%of 433usually 1.7% 6
25. 25 SVO Moscow 1.4%of 429usually 2.0% 6
26. 26 LGA New York 1.1%of 522usually 3.6% 6
27. 27 HND Tokyo 0.9%of 668usually 1.6% 6
28. 28 FRA Frankfurt am Main 0.8%of 719usually 1.3% 6
29. 29 WLG Wellington 90 departures seen 5
30. 30 GMP Seoul 2.7%of 183usually 1.4% 5
31. 31 AKL Auckland 2.6%of 194usually 2.1% 5
32. 32 STR Stuttgart 2.5%of 199usually 1.1% 5
33. 33 PTY Tocumen 2.1%of 234usually 1.5% 5
34. 34 SYD Sydney 1.4%of 348usually 1.6% 5
35. 35 AGP Málaga 1.3%of 392usually 0.4% 5
36. 36 ZRH Zurich 1.3%of 396usually 1.2% 5
37. 37 CDG Paris 0.7%of 677usually 1.0% 5
38. 38 SEA Seattle 0.7%of 674usually 0.7% 5
39. 39 ATL Atlanta 0.4%of 1134usually 0.7% 5
40. 40 YYJ Victoria 18 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.

Sun 23 Aug: 634 cancelled of 59,219 tracked (1.1%) across 245 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.