A technical failure in the UK’s National Air Traffic Services (NATS) flight data processing system caused the cancellation of up to 1,000 flights across London Heathrow and other UK airports on September 8, 2026. The fault began around 1pm local time and was corrected by 4:40pm, but the backlog of grounded aircraft extended delays into the following day. This disruption was one of the UK’s largest stoppages in over three years, affecting multiple airports and grounding flights for hours.
Australian Travelers Stranded Overnight at Heathrow
Among those affected, Australian travelers Monique and Frank Whiting were stranded overnight at Heathrow Airport after their Icelandair flight to Iceland
was cancelled. They spent more than four hours waiting on the aircraft before being ordered to disembark due to unavailable ramps. Nearby hotels were largely full, leaving passengers with no immediate accommodation options. Monique Whiting noted, “A bunch of other things had already been cancelled, and a lot of the close-by accommodation was obviously already booked out.” Passengers faced difficulties finding lodging and had to arrange their own accommodation with only partial reimbursement offered by airlines.
Widespread UK Airport Disruption and Airline Cancellations
The NATS fault disrupted operations at several major UK airports including London Heathrow, Gatwick, Manchester, Birmingham, and Dublin. Dublin Airport remained open overnight to
assist stranded passengers and confirmed airlines operated a full schedule on September 9. EasyJet cancelled approximately 200 flights, British Airways cancelled or diverted more than 100 flights, and Ryanair reported over 65,000 delayed passengers alongside 50 flight cancellations. Ryanair also stated delays reached up to eight hours. The disruption affected over 2,000 flight cancellations in the UK across two days, causing significant knock-on effects throughout the European flight network.
Continued Impact on September 9 and Airline Responses
Recovery efforts extended into September 9 as airlines and airports worked overnight to reposition aircraft and crews to resume flights. British Airways offered free rebooking until Friday, September 11, 2026, to
support affected passengers. Despite the technical fault being fixed at 4:40pm on September 8, flight operations continued to be impacted with delays and cancellations expected to persist. Ryanair estimated approximately 150,000 passengers were affected countrywide by the failure.
Official Statements and Industry Reactions
NATS CEO Martin Rolfe apologized for the disruption and promised a full investigation into the cause of the fault, stating it was separate from outages in 2023 and 2025. Dublin Airport confirmed ongoing assistance for stranded passengers while maintaining a full schedule on September 9. Ryanair publicly called for Martin Rolfe’s resignation due to repeated air traffic control failures and their impact
on passengers.
Passenger Experiences During the Disruption
Travelers described prolonged delays and difficult conditions. Debbie Payne, stranded at Heathrow, said, “There were people on planes who couldn’t get off because there were no ramps.” She added, “I felt sorry for people who didn’t speak English and those with young babies.” Australian traveler Monique Whiting described seeing numerous planes lined up for takeoff and the widespread accommodation shortage during the disruption.
