Daily delay log
London Heathrow delays on 21 September 2026
2 arrivals ran 3 hours or more late and 8 were cancelled at London Heathrow that day. Every one is below, with what it is worth per person.
Why this day was disrupted
21 September 2026 was a second NATS air traffic control failure, at Prestwick. The CAA said disruption caused by it is likely to count as extraordinary circumstances, so compensation is unlikely to be owed for those flights, including the knock-on delays over the days after.
What the airline still owes you does not depend on whose fault it was: food and drink, a hotel and the transfers to it if you were stuck overnight, and your money back if you gave up on the trip.
Every flight
Find your flight
Every arrival into London Heathrow we logged on 21 September 2026 that ran 3 or more hours late or was cancelled, and that UK or EU rules cover. The amount is what UK or EU rules pay that passenger, per person on the booking: usually the full rate for the distance, and half of it on the longest flights that landed between 3 and 4 hours late. Airlines can still dispute a claim by proving the cause was outside their control, so check yours to get the real answer.
BA911
British Airways
Frankfurt-am-Main → London Heathrow Airport
07:20
KL1001
KLM
Amsterdam → London Heathrow Airport
07:40
BA298
British Airways
Chicago → London Heathrow Airport
09:05
BA1483
British Airways
Glasgow → London Heathrow Airport
14:55
BA435
British Airways
Amsterdam → London Heathrow Airport
16:05
BA831
British Airways
Dublin → London Heathrow Airport
16:45
BA1335
British Airways
Newcastle upon Tyne → London Heathrow Airport
17:35
BA1315
British Airways
Aberdeen → London Heathrow Airport
20:00
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Around this day
This is our own arrivals tracking, not CAA punctuality data: we sweep the airports we cover several times a day and log every arrival that crosses the 3-hour line or is cancelled outright. It is not every flight into London Heathrow that day, only the ones that went wrong -- and of those, only the ones UK or EU rules cover, which is what this page is about. The day page counts everything we logged, so its totals are larger.