Widespread Cyberattack Cripples European Aviation Hubs

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A widespread cyberattack on Collins Aerospace, a major aviation technology provider, has caused significant operational disruptions across major European airports, leading to thousands of stranded passengers and the cancellation of numerous flights. The attack targeted critical systems used for check-in and baggage handling, forcing airlines to revert to manual processes and causing chaos at travel hubs like Heathrow, Brussels, and Berlin.

Why it matters

The scale of the disruption represents a major single-day event for the European aviation system, which has been working to recover from the pandemic's impact. These types of widespread technical failures expose the vulnerability of the interconnected air travel network when multiple countries are affected simultaneously, with ripple effects that can last for days.

The details

The disruptions were concentrated at key transport hubs, including Heathrow in London, Brussels, and Berlin. At Heathrow, at least 13 flights were cancelled by the afternoon of Saturday, April 4, 2026, as passengers reported massive, hours-long queues due to the system failures. The technical issues forced some carriers, including KLM, to revert to manual processes for issuing boarding passes and handling baggage.

• The cyberattack on Collins Aerospace occurred on April 4, 2026.
• At least 13 flights were cancelled at Heathrow Airport by the afternoon of April 4, 2026.

What’s next

Aviation authorities and cybersecurity experts are working to investigate the source and extent of the cyberattack, as well as to restore normal operations at affected airports as quickly as possible.