Cancellations on 31 Aug

1. 1 ORD Chicago 12.9%of 1517usually 1.4% 196
2. 2 BOG Bogota 6.7%of 586usually 1.0% 39
3. 3 AMS Amsterdam 3.6%of 691usually 1.5% 25
4. 4 YYZ Toronto 4.1%of 560usually 2.6% 23
5. 5 IST Istanbul 2.2%of 818usually 2.7% 18
6. 6 YUL Montréal 5.1%of 297usually 4.4% 15
7. 7 IAD Washington 3.6%of 411usually 2.8% 15
8. 8 NBO Nairobi 127 departures seen 12
9. 9 BOS Boston 2.0%of 613usually 2.6% 12
10. 10 LHR London 1.8%of 676usually 1.2% 12
11. 11 LGA New York 2.0%of 563usually 4.7% 11
12. 12 FRA Frankfurt am Main 1.5%of 732usually 1.6% 11
13. 13 DEL New Delhi 0.7%of 1567usually 0.9% 11
14. 14 SFO San Francisco 0.6%of 1964usually 0.5% 11
15. 15 CGH São Paulo 3.6%of 279usually 1.3% 10
16. 16 BOM Mumbai 2.1%of 485usually 1.1% 10
17. 17 FUK Fukuoka 3.5%of 258usually 3.8% 9
18. 18 OSL Oslo 2.4%of 371usually 3.1% 9
19. 19 DTW Detroit 0.4%of 2202usually 0.3% 9
20. 20 EBB Entebbe 76 departures seen 8
21. 21 CJU Jeju City 3.1%of 256usually 0.9% 8
22. 22 NRT Tokyo 2.5%of 314usually 1.2% 8
23. 23 BNE Brisbane 2.3%of 305usually 1.8% 7
24. 24 DCA Washington 1.5%of 458usually 2.9% 7
25. 25 DXB Dubai 1.4%of 513usually 0.8% 7
26. 26 CUN Cancún 3.3%of 180usually 3.4% 6
27. 27 TPE Taipei 1.7%of 343usually 1.4% 6
28. 28 JED Jeddah 1.3%of 446usually 1.2% 6
29. 29 PEK Beijing 0.9%of 645usually 1.7% 6
30. 30 LAX Los Angeles 0.8%of 732usually 0.7% 6
31. 31 MDE Medellín 149 departures seen 5
32. 32 AKL Auckland 2.5%of 202usually 1.5% 5
33. 33 DUS Düsseldorf 1.9%of 263usually 0.8% 5
34. 34 MAN Manchester 1.9%of 257usually 1.6% 5
35. 35 LIM Lima 1.7%of 286usually 3.1% 5
36. 36 CAN Guangzhou 0.7%of 763usually 1.0% 5
37. 37 DEN Denver 0.5%of 1036usually 1.3% 5
38. 38 NCE Nice 2.0%of 198usually 2.1% 4
39. 39 MEL Melbourne 1.3%of 319usually 1.1% 4
40. 40 SAN San Diego 1.1%of 364usually 0.5% 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.

Mon 31 Aug: 762 cancelled of 58,459 tracked (1.3%) across 229 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.