On September 8, 2026, a technical failure in the UK’s National Air Traffic Services (NATS) flight plan processing system led to the cancellation of more than 600 flights across the country by around 5 p.m. UTC. Data from FlightRadar24 cited by The Associated Press confirmed approximately 625 flights were cancelled on that day, severely disrupting operations at major airports.
Impact on UK and Irish Airports
The disruption affected roughly 15 UK airports, including Heathrow, Gatwick, Manchester, Stansted, Edinburgh, Glasgow, Aberdeen, Birmingham, East Midlands and Belfast. Heathrow reported about 100 cancellations alongside 367 delays, mainly impacting short-haul European routes. Gatwick saw around 250 flight delays, representing roughly
31% of its scheduled services. In Scotland, Edinburgh Airport recorded 29 cancellations and delays affecting 58% of flights with an average delay length of 26 minutes. Glasgow International had 18 cancellations and notable delays. Irish airports Dublin and Cork also experienced knock-on effects tied to the UK disruption.
Airline Operational Impact and Responses
Ryanair disclosed that over 65,000 passengers were affected, cancelling more than 50 of its flights. The airline criticized NATS leadership for repeated issues and called for the resignation of CEO Martin Rolfe. British Airways confirmed cancelling or diverting over 100 flights, emphasizing the disruption was beyond their control. easyJet reported some flights
could not operate due to the NATS failure and warned of wider delays throughout Europe.
Cause and Technical Background
The underlying cause was a failure in NATS’s flight plan processing system, which manages flight information for air traffic control. This fault paused or restricted departures at multiple airports, reducing the system’s capacity despite UK airspace remaining open. NATS engineers identified the issue, implemented a fix, and began the recovery process by mid-afternoon. However, delays and cancellations continued as aircraft and crews were displaced, creating a backlog that will take time to resolve. NATS confirmed no cybersecurity breaches were involved.
Passenger Experience and Official Statements
Thousands of passengers faced disrupted
travel plans, with Ryanair customers reporting delays lasting up to eight hours. Some were stuck on aircraft for extended periods before cancellations were confirmed. Airlines advised travelers to monitor flight statuses directly, manage rebookings, and noted compensation rules applied due to the air traffic control failure. NATS apologized for the disruption, stating “which was in our flight plan processing system.” British Airways described the disruption as frustrating for customers and crews alike. Airports emphasized reliance on airline communications for updated schedules.
Context of UK Airspace Management and Past Incidents
The UK’s airspace handles over 2.5 million flight movements annually during peak periods. The disrupted flight plan processing system
failed previously in August 2023, causing about 1,500 cancellations and prompting a Civil Aviation Authority review with 34 recommendations. NATS operates air traffic control from centers in Swanwick, southern England, and Prestwick, Scotland. Since 2022, NATS air traffic control charges have risen by 28%, amid ongoing concerns regarding system reliability.
