About 98,000 passengers are expected to arrive and depart through Dublin Airport on Friday, in what is expected to be the busiest travel day of the Christmas period.
More than 1 million passengers will pass through the airport over the next 12 days, according to the operator DAA.
Graeme McQueen, media relations manager for DAA, said the numbers travelling this year will be up by around 95 per cent on the same period last year.
"We are expecting Dublin Airport to remain busy over the coming days," he told Newstalk radio. "Anyone who is flying we recommend that they get to the airport two hours before a short-haul flight and three hours before a long-haul flight.
"If you're checking in a bag with your airline, we would recommend allowing up to an additional hour.
"Everything has been moving really well over the past few weeks at Dublin Airport, and we're expecting that to continue."
Meanwhile, tens of thousands of people are expected to fly home through airports in Belfast and Derry over the coming days.
Belfast City Airport said it was expecting up to 10,000 passengers on Friday alone, while scores of travellers will arrive via Belfast International Airport, City of Derry Airport and the ferry ports.
There is additional Christmas cheer at Belfast City Airport with school choirs singing carols and visits from Santa.
Airport chief executive Matthew Hall said passenger numbers have recovered since the coronavirus pandemic, but are not back to 2019 levels.
“The most wonderful time of year is once again upon us, and with travel very much back on the cards for many as they reunite with friends and family for yuletide celebrations, Belfast City Airport is expecting to welcome thousands of passengers through its doors this week, with up to 10,000 on December 23 alone,” he said.
“This return to travel is a positive indication of the aviation sector’s recovery, and whilst the airport is not quite back to the passenger volumes of 2019, we do expect to achieve these in the early part of 2023.”
He added: “Every December we relish the opportunity to help spread Christmas cheer in the terminal and this year our passengers enjoyed choir performances from our adopted schools, carolling with Santa and Mrs Claus, gift wrapping stations, and airline partner competitions, whilst staff also participated in many festivities and events in aid of our charity partner of the year, AWARE.”
Looking back at 2022, Mr Hall said they welcomed three new major airline partners; Aer Lingus Regional, flybe, and Lufthansa.
“We enter 2023 with a robust route network of 26 destinations across the UK and Europe, offering passengers plenty of choice, convenience, and flexibility when it comes to travel to and from our shores, and with plans to explore further opportunities for growth,” he said.
“As we close out this year, we would like to take the opportunity to sincerely thank our passengers, our stakeholders, and the local community for their continued support, and extend our warmest wishes for a very Happy Christmas and a prosperous New Year.” – Additional reporting: PA
