What is the situation on Monday at the European airports affected by the massive weekend cyber attack, which led to queues and flight cancellations
Travelers are waiting in Terminal 4 of Heathrow Airport, west of London on September 20, 2025. The big European airports, including Brussels, Berlin and Heathrow in London, were affected on Saturday by “cyber disturbances.” Credit Line: Justin Tallis / AFP / Profimedia Images
Some of the largest airports in Europe on Sunday endeavor to return to normal operations after a major cyber attack disturbed automatic check-in systems, Brussels asking for airlines to cancel half of Mondays due to persistent issues, reports Reuters.
On Friday, hackers targeted the provider of check-in systems and museum boarding of Collins Aerospace, a company owned by the American giant RTX (former Raytheon Technologies), disturbing operations at Heathrow Airport-the busiest airport in Europe, at Berlin and Brussels.
Passengers faced long queues, cancellations and delays on Saturday. Although disturbances have been significantly reduced in Berlin and Heathrow Sunday, according to available airports and data, delays and cancellations continued.
In a statement made on Monday morning, Collins Aerospace said he works with the four airports and affected airlines, and that they are in the final phase of completion of the updates needed to restore complete functionality.
The biggest issues are at Brussels Airport
A spokesman for Brussels Airport, the main International Airport of Belgium, said Collins Aerospace has not yet provided a safe and updated version of the software, necessary to restore complete functionality, which caused the airport to request the cancellation of some flights Monday.
Brussels airport has announced that 50 of the 257 departures scheduled for Sunday were canceled to avoid long queues and last -minute cancellations. A day earlier, 25 of the 234 flights scheduled for departure were canceled, the airport operator said.
RTX said on Saturday that he works to solve the problem as quickly as possible and that the disturbance can be alleviated by manual check-in operations.
The company admitted that the incident affected its Muse software, used by several airlines.
A passenger waiting for boarding in Brussels told Reuters that the disturbance of his trip was minimal.
“For me, everything was like us. Those unhappy who did not check-in online or had luggage to teach you may have been waiting for something more,” he said.
Most European airports found solutions after cyber attack
Berlin Brandenburg Airport announced on Sunday that some problems persist, but that there is a manual working solution.
“Occasionally, higher waiting times occur in check-in, boarding, luggage handling and luggage recovery. Delays of today's departure flights are comparable to a normal operating day,” the Airport said.
Heathrow said on Sunday morning that he is still working to remedy the failure of the check-in system and added that “the vast majority of flights continued to operate.”
An analysis by the Cirium aviation data provider showed that delays in Heathrow were “low” in Berlin “moderate”, while in Brussels they were “significant”.
The regional regulatory authorities said they are investigating the source of the computer attack, the most recent in a series of attacks that targeted health sectors to the automotive industry.
