Cancellations on 16 Aug

1. 1 DEN Denver 4.1%of 1145usually 4.4% 47
2. 2 BOS Boston 3.9%of 647usually 6.0% 25
3. 3 SFO San Francisco 1.2%of 2000usually 0.8% 24
4. 4 DCA Washington 4.7%of 468usually 7.5% 22
5. 5 CDG Paris 3.1%of 678usually 0.8% 21
6. 6 IST Istanbul 2.5%of 835usually 3.2% 21
7. 7 DEL New Delhi 1.2%of 1573usually 0.9% 19
8. 8 YYZ Toronto 3.1%of 577usually 4.2% 18
9. 9 MXP Milan 5.2%of 326usually 1.9% 17
10. 10 IAD Washington 3.2%of 440usually 5.1% 14
11. 11 JFK New York 1.8%of 679usually 4.7% 12
12. 12 LIM Lima 3.8%of 291usually 3.0% 11
13. 13 FRA Frankfurt am Main 1.5%of 728usually 1.6% 11
14. 14 SEA Seattle 1.5%of 712usually 1.1% 11
15. 15 ORY Paris 3.0%of 333usually 1.1% 10
16. 16 EWR New York 1.7%of 545usually 4.8% 9
17. 17 YUL Montréal 2.7%of 291usually 4.4% 8
18. 18 AMS Amsterdam 1.2%of 643usually 1.8% 8
19. 19 FCO Rome 148 departures seen 7
20. 20 GMP Seoul 3.8%of 184usually 1.0% 7
21. 21 NCE Nice 3.5%of 198usually 1.2% 7
22. 22 YYC Calgary 2.5%of 275usually 4.2% 7
23. 23 BOM Mumbai 1.5%of 452usually 2.2% 7
24. 24 LGA New York 1.4%of 511usually 5.5% 7
25. 25 KUL Kuala Lumpur 1.3%of 523usually 0.9% 7
26. 26 PEK Beijing 1.0%of 719usually 3.3% 7
27. 27 WLG Wellington 89 departures seen 6
28. 28 HEL Helsinki 2.8%of 218usually 1.2% 6
29. 29 BNA Nashville 1.6%of 387usually 2.0% 6
30. 30 OSL Oslo 1.6%of 371usually 0.4% 6
31. 31 JED Jeddah 1.4%of 422usually 1.5% 6
32. 32 LAX Los Angeles 0.7%of 844usually 0.8% 6
33. 33 PUS Busan 27 departures seen 5
34. 34 CVG Cincinnati / Covington 2.7%of 187usually 4.5% 5
35. 35 AKL Auckland 2.5%of 200usually 2.0% 5
36. 36 LAS Las Vegas 0.8%of 624usually 0.8% 5
37. 37 LHR London 0.7%of 671usually 1.3% 5
38. 38 ATL Atlanta 0.4%of 1146usually 1.1% 5
39. 39 BCN Barcelona 0.3%of 1515usually 1.8% 5
40. 40 CHC Christchurch 85 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 16 Aug: 679 cancelled of 60,965 tracked (1.1%) across 244 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.