Brussels Airport cancelled 45 of 257 scheduled flights after a cyberattack on a service provider. Photo: AP PHOTO

Some of Europe's biggest airports, including the region's busiest, London's Heathrow, are racing to restore normal operations after hackers disrupted automatic check-in systems.

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Hackers on Saturday targeted check-in and boarding systems provider Collins Aerospace, owned by RTX, disrupting operations at Heathrow, Berlin Airport and in Brussels, where passengers faced long queues, cancellations and delays.

Disruption had eased significantly by early Sunday despite some co

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