A cyberattack is causing major delays and some flight cancellations at European airports, including London’s Heathrow Airport.
The cyberattack, which occurred on Friday, affected electronic check-in and boarding systems made and serviced by Collins Aerospace. Brussels Airport said that passengers were able to check in manually, while other airports noted that longer wait times were likely.
RTX Corp., the parent company of Collins Aerospace, said it is working to rectify the issue. “The impact is limited to electronic customer check-in and baggage drop and can be mitigated with manual check-in operations,” the company said in a statement to Reuters. Fast Company reached out to RTX for comment but did not hear back by the time of publication.
According to FlightAware, a Houston-based flight tracking data company, Heathrow alone has seen more than 400 delays today. Some 651 flights were slated to depart from the airport Saturday, according to Reuters.
The cyberattack is the latest in a run of similar incidents affecting airports in recent years. According to the Technology Advancement Center, a nonprofit that tracks technology, ransomware and other cyber threats on aviation systems have increased 600% from 2024 to 2025.
The affected airports have advised fliers to check their flight status for cancellations or delays.