Check-in counters at a terminal at Berlin’s Brandenburg airport in Schönefeld, Germany, on Sept. 20, 2025, after a cyberattack targeting check-in and boarding systems disrupted air traffic at several major European airports. Carsten Koall/dpa via AP
BRUSSELS—Fallout from a cyberattack that disrupted check-in systems at several European airports extended into a second full day on Sunday, as passengers faced dozens of canceled and delayed flights—and the impact poised to worsen for at least one major airport.
Brussels Airport, seemingly the hardest hit, said it asked airlines to cancel nearly 140 departing flights scheduled for Monday because a U.S.-based software system provider “is not yet able to deliver a new secure version of the check-in system.” The airport said 25 outbound flights were canceled on Saturday and 50 on Sunday.
