Cancellations on 23 Sept

1. 1 IST Istanbul 4.7%of 771usually 3.6% 36
2. 2 KEF Reykjavík 74 departures seen 28
3. 3 BOS Boston 3.7%of 567usually 3.0% 21
4. 4 AMS Amsterdam 3.1%of 669usually 1.8% 21
5. 5 BNE Brisbane 5.6%of 339usually 3.7% 19
6. 6 SYD Sydney 4.2%of 384usually 1.7% 16
7. 7 YVR Vancouver 4.4%of 340usually 1.7% 15
8. 8 BCN Barcelona 1.0%of 1505usually 1.3% 15
9. 9 CNF Belo Horizonte 7.5%of 173usually 3.5% 13
10. 10 CGH São Paulo 4.2%of 284usually 3.4% 12
11. 11 PEK Beijing 1.8%of 654usually 1.0% 12
12. 12 LHR London 1.6%of 669usually 1.1% 11
13. 13 DEL New Delhi 0.7%of 1523usually 0.9% 10
14. 14 CUN Cancún 147 departures seen 9
15. 15 LIM Lima 2.9%of 277usually 2.7% 8
16. 16 YYZ Toronto 1.6%of 509usually 1.9% 8
17. 17 CDG Paris 1.3%of 629usually 0.6% 8
18. 18 FRA Frankfurt am Main 1.0%of 784usually 0.7% 8
19. 19 ORD Chicago 0.6%of 1381usually 2.1% 8
20. 20 EBB Entebbe 47 departures seen 7
21. 21 MEL Melbourne 2.0%of 355usually 1.1% 7
22. 22 BOM Mumbai 1.6%of 425usually 1.9% 7
23. 23 DXB Dubai 1.4%of 504usually 1.1% 7
24. 24 BER Berlin 2.4%of 249usually 1.1% 6
25. 25 BRU Brussels 2.3%of 259usually 1.0% 6
26. 26 STN London 2.2%of 271usually 0.6% 6
27. 27 SAN San Diego 1.9%of 322usually 0.7% 6
28. 28 TPE Taipei 1.7%of 354usually 1.3% 6
29. 29 IAD Washington 1.6%of 378usually 1.7% 6
30. 30 ADL Adelaide 127 departures seen 4
31. 31 GIG Rio De Janeiro 2.1%of 191usually 1.1% 4
32. 32 MAN Manchester 1.8%of 225usually 1.9% 4
33. 33 YUL Montréal 1.5%of 265usually 2.0% 4
34. 34 ARN Stockholm 1.3%of 304usually 1.0% 4
35. 35 ZRH Zurich 1.1%of 379usually 0.6% 4
36. 36 SIN Singapore 0.8%of 482usually 0.7% 4
37. 37 HND Tokyo 0.6%of 677usually 3.1% 4
38. 38 CAN Guangzhou 0.5%of 809usually 0.7% 4
39. 39 NGS Nagasaki 38 departures seen 3
40. 40 ABQ Albuquerque 73 departures seen 3

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 23 Sept: 495 cancelled of 49,950 tracked (1.0%) across 216 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. Showing the most recent 90 days; the full series is in the JSON feed.

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.