Travellers queue to check-in at Heathrow Airport Terminal 4, following a disruption to check-in and boarding systems caused by a cyberattack which has affected several major European airports, resulting in flight delays and cancellations, in Greater London, Britain, on Sept 20, 2025. — Reuters
Airports in Berlin, London and Brussels faced continued delays on Sept 21 after a cyberattack on a key airline check-in system forced staff to process passengers manually.
The outage stems from a cyber incident at Collins Aerospace that knocked out its MUSE software late Friday. The platform underpins check-in, boarding and baggage systems for airlines worldwide. With kiosks and bag-drop machines offline, airports have been forced to rely on manual processing, slowing passenger flows.
