British Airways passengers continue to face delays, cancellations, and overcrowding Sunday at Heathrow Airport as the airline reels from a computer failure.

The airline said that all long-haul flights will continue Sunday, but to avoid further overcrowding, passengers will only be allowed to enter the airport terminal 90 minutes before their scheduled departure.

Passengers should still expect delays and cancelations for shorter flights, British Airways chief executive Alex Cruz said, adding that the airline was at “near-full operation” Sunday.

“I know this has been a horrible time for customers,” Cruz said, apologizing in a video statement posted online.

 
The airline was forced to cancel flights Saturday at Heathrow and Gatwick airports as officials tried to fix a global computer failure.

British Airways has not said what caused the glitch, but did report there is no evidence pointing to a cyber attack.

The failure occurred on a particularly busy weekend in Britain, where a public holiday will be observed on Monday and when many children are starting their mid-term school breaks — prompting some stranded travelers to express their frustration on Twitter.

British Airways has experienced other recent computer glitches. Passengers were hit with severe delays in July and September last year because of problems with the airline’s online check-in systems.

 
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