Cancellations on 1 Sept

1. 1 LGA New York 11.8%of 560usually 5.6% 66
2. 2 EWR New York 8.0%of 525usually 4.2% 42
3. 3 JFK New York 6.6%of 617usually 3.4% 41
4. 4 BOS Boston 6.7%of 583usually 2.9% 39
5. 5 CGH São Paulo 8.7%of 275usually 1.9% 24
6. 6 IST Istanbul 3.0%of 791usually 2.6% 24
7. 7 DEL New Delhi 1.4%of 1469usually 0.9% 20
8. 8 YYZ Toronto 3.5%of 548usually 2.8% 19
9. 9 ORD Chicago 1.3%of 1482usually 1.5% 19
10. 10 YUL Montréal 6.0%of 285usually 4.6% 17
11. 11 BOM Mumbai 3.3%of 513usually 1.2% 17
12. 12 BNE Brisbane 4.9%of 285usually 1.9% 14
13. 13 OSL Oslo 4.0%of 353usually 3.3% 14
14. 14 NBO Nairobi 113 departures seen 12
15. 15 CUN Cancún 6.8%of 161usually 3.6% 11
16. 16 IAD Washington 3.0%of 370usually 2.8% 11
17. 17 DCA Washington 2.4%of 456usually 2.9% 11
18. 18 CDG Paris 1.7%of 657usually 1.2% 11
19. 19 LAX Los Angeles 1.7%of 656usually 0.8% 11
20. 20 BCN Barcelona 0.8%of 1442usually 1.1% 11
21. 21 SFO San Francisco 0.6%of 1759usually 0.5% 11
22. 22 DTW Detroit 0.5%of 2058usually 0.3% 11
23. 23 IND Indianapolis 130 departures seen 9
24. 24 CAN Guangzhou 1.2%of 746usually 0.9% 9
25. 25 PEK Beijing 1.4%of 588usually 1.7% 8
26. 26 AMS Amsterdam 1.2%of 665usually 1.5% 8
27. 27 FRA Frankfurt am Main 1.1%of 701usually 1.6% 8
28. 28 EBB Entebbe 55 departures seen 7
29. 29 CNF Belo Horizonte 4.1%of 170usually 1.5% 7
30. 30 BER Berlin 3.4%of 207usually 1.6% 7
31. 31 TPE Taipei 2.0%of 355usually 1.4% 7
32. 32 CPH Copenhagen 1.8%of 388usually 0.7% 7
33. 33 DXB Dubai 1.4%of 514usually 0.8% 7
34. 34 CLT Charlotte 1.2%of 603usually 0.6% 7
35. 35 FUK Fukuoka 2.3%of 257usually 4.0% 6
36. 36 FLL Fort Lauderdale 2.2%of 270usually 2.1% 6
37. 37 WAW Warsaw 2.0%of 301usually 0.8% 6
38. 38 MCO Orlando 1.6%of 369usually 1.0% 6
39. 39 YOW Ottawa 43 departures seen 5
40. 40 SIN Singapore 1.1%of 469usually 0.4% 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.

Tue 1 Sept: 783 cancelled of 55,219 tracked (1.4%) across 228 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.