Aer Lingus says it's operating a normal schedule today.
In a statement, the company sincerely apologised for the severe disruption on Saturday.
The airline is advising customers impacted by the system outage to apply for a refund or change their travel plans, free of charge, through the 'manage booking' facility, call centres, and social media.
Passengers at Terminal 2 in Dublin Airport after Aer Lingus flights were cancelled due to an IT problem at the airline. Picture by: Sam Boal / RollingNews.ieTravel expert Eoghan Corry has this advice for those trying to get in touch with Aer Lingus:
"So getting in touch with Aer Lingus, my strong advice is go to the webchat - which of course wasn't working on Saturday - and go through direct messaging.
"They're the two key ways to get in touch with an airline."
