Cancellations on 12 Aug

1. 1 BCN Barcelona 8.1%of 1537usually 1.5% 124
2. 2 DEN Denver 4.2%of 1063usually 3.4% 45
3. 3 YYZ Toronto 5.5%of 560usually 5.0% 31
4. 4 IST Istanbul 3.5%of 797usually 3.3% 28
5. 5 BOS Boston 4.0%of 622usually 5.6% 25
6. 6 IAD Washington 6.1%of 392usually 4.0% 24
7. 7 MIA Miami 4.8%of 500usually 4.1% 24
8. 8 DCA Washington 5.0%of 457usually 7.3% 23
9. 9 ATL Atlanta 2.1%of 1101usually 1.2% 23
10. 10 BOG Bogota 3.3%of 669usually 2.2% 22
11. 11 PEK Beijing 3.0%of 711usually 3.1% 21
12. 12 JFK New York 2.9%of 647usually 4.6% 19
13. 13 ORD Chicago 0.9%of 1603usually 0.8% 15
14. 14 AMS Amsterdam 2.2%of 641usually 1.7% 14
15. 15 JED Jeddah 2.8%of 427usually 2.0% 12
16. 16 EWR New York 2.3%of 526usually 4.6% 12
17. 17 DEL New Delhi 0.7%of 1615usually 0.9% 12
18. 18 LGA New York 2.1%of 536usually 5.7% 11
19. 19 BOM Mumbai 2.2%of 448usually 2.5% 10
20. 20 LIM Lima 3.1%of 289usually 2.0% 9
21. 21 CVG Cincinnati / Covington 4.5%of 178usually 4.0% 8
22. 22 FRA Frankfurt am Main 1.1%of 709usually 1.7% 8
23. 23 YUL Montréal 2.3%of 298usually 4.8% 7
24. 24 DXB Dubai 1.3%of 523usually 1.2% 7
25. 25 LHR London 1.0%of 671usually 1.2% 7
26. 26 CAN Guangzhou 0.9%of 807usually 1.1% 7
27. 27 AKL Auckland 3.3%of 184usually 1.1% 6
28. 28 TPA Tampa 2.6%of 233usually 2.1% 6
29. 29 FLL Fort Lauderdale 2.2%of 273usually 2.8% 6
30. 30 MXP Milan 1.9%of 308usually 1.5% 6
31. 31 SYD Sydney 1.7%of 346usually 1.5% 6
32. 32 AGP Málaga 1.6%of 378usually 0.6% 6
33. 33 MUC Munich 1.3%of 458usually 0.8% 6
34. 34 SHA Shanghai 1.1%of 550usually 2.0% 6
35. 35 IAH Houston 1.0%of 579usually 0.9% 6
36. 36 CDG Paris 0.9%of 655usually 0.4% 6
37. 37 CGO Zhengzhou 31 departures seen 5
38. 38 FCO Rome 134 departures seen 5
39. 39 ORY Paris 1.6%of 307usually 0.7% 5
40. 40 BNA Nashville 1.4%of 356usually 1.8% 5

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.

Wed 12 Aug: 871 cancelled of 57,567 tracked (1.5%) across 230 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.