Air travellers are facing more disruption at some major European airports following a cyberattack.

The airports, including the region's busiest London Heathrow, raced on Sunday to restore normal operations to automatic check-in systems after disruption caused by hackers a day earlier.

The hacking incident hit check-in and boarding systems provider Collins Aerospace, owned by RTX, disrupting operations on Saturday at London's Heathrow, Berlin Airport and in Brussels, where passengers faced long queues, dozens of cancellations and delays.

Disruption had eased significantly by Sunday despite some continuing delays, but late on Sunday, Brussels, Berlin and Dublin airports were still manually boarding passengers.

Brussels Airport, which was seemingly the hardest hit, warned the disruption

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