Cancellations on 21 Sept

1. 1 EWR New York 56.6%of 546usually 4.7% 309
2. 2 HND Tokyo 28.3%of 682usually 3.0% 193
3. 3 NRT Tokyo 29.9%of 318usually 3.6% 95
4. 4 BOS Boston 7.0%of 611usually 2.7% 43
5. 5 SFO San Francisco 2.2%of 1953usually 0.5% 43
6. 6 IST Istanbul 4.9%of 779usually 3.5% 38
7. 7 FUK Fukuoka 14.5%of 255usually 3.0% 37
8. 8 ORD Chicago 1.6%of 1479usually 2.1% 23
9. 9 YYZ Toronto 3.8%of 529usually 1.8% 20
10. 10 AMS Amsterdam 2.7%of 695usually 2.2% 19
11. 11 OKA Naha 8.8%of 204usually 1.2% 18
12. 12 DEL New Delhi 1.1%of 1591usually 1.0% 18
13. 13 CLT Charlotte 2.0%of 697usually 0.3% 14
14. 14 ITM Osaka 7.0%of 185usually 0.9% 13
15. 15 YVR Vancouver 3.7%of 356usually 1.3% 13
16. 16 BOM Mumbai 3.1%of 419usually 1.7% 13
17. 17 MCO Orlando 3.0%of 427usually 0.6% 13
18. 18 ICN Seoul 2.4%of 547usually 0.3% 13
19. 19 CUN Cancún 7.2%of 167usually 5.5% 12
20. 20 LIM Lima 4.0%of 297usually 2.6% 12
21. 21 PEK Beijing 1.9%of 625usually 1.1% 12
22. 22 SYD Sydney 2.7%of 405usually 1.3% 11
23. 23 LGA New York 2.0%of 539usually 0.5% 11
24. 24 JFK New York 1.9%of 576usually 0.6% 11
25. 25 YUL Montréal 3.8%of 263usually 2.0% 10
26. 26 BNE Brisbane 3.1%of 323usually 3.5% 10
27. 27 DUB Dublin 2.7%of 368usually 1.6% 10
28. 28 TPE Taipei 2.6%of 343usually 1.3% 9
29. 29 IAD Washington 2.2%of 414usually 1.9% 9
30. 30 HKG Hong Kong 2.1%of 424usually 0.4% 9
31. 31 IAH Houston 1.5%of 615usually 0.5% 9
32. 32 PHX Phoenix 1.4%of 648usually 0.5% 9
33. 33 LHR London 1.3%of 672usually 4.9% 9
34. 34 LAX Los Angeles 1.2%of 747usually 0.9% 9
35. 35 DCA Washington 1.8%of 456usually 1.0% 8
36. 36 MIA Miami 1.8%of 439usually 1.1% 8
37. 37 NGS Nagasaki 38 departures seen 7
38. 38 CTS Sapporo 44 departures seen 7
39. 39 IND Indianapolis 4.4%of 160usually 1.1% 7
40. 40 MAN Manchester 2.8%of 251usually 3.3% 7

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.

Mon 21 Sept: 1405 cancelled of 54,072 tracked (2.6%) across 227 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.