Dublin Airport closed on Thursday evening Dublin Airport has reopened after heavy snowfall caused delays to 270 flights.
About 40,000 people were affected as 15,000 tonnes of snow was cleared from the runway on Thursday.
The airport reopened early on Friday but delays and cancellations are still expected. Passengers have been asked to contact their airline.
Northern Ireland motorists have also been some of the hardest hit in the UK in the icy conditions, according to the Automobile Association (AA).
An AA spokesman said it expected to attend up to 19,000 call-outs across the UK on Thursday, with the highest number in Northern Ireland and Scotland.
He added that the breakdown workload had eased slightly, but it was still double the normal rate as Christmas getaway and shoppping traffic peaked.
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