More than 2,400 flights are due to arrive and depart this weekend
Dublin Airport says it expects more than 345,000 passengers to travel through it this October bank holiday weekend.
It says passenger numbers are up 3% over the same weekend last year.
More than 2,400 flights are due to arrive and depart this weekend, with Friday being the busiest day.
Dublin Airport spokesperson Siobhán O'Donnell says : "We're expecting an average of 86,000 passengers each day over the course of the October bank holiday weekend.
"Today (Friday) is expected to be the busiest day... with more than 96,000 passengers travelling through the airport."
Passengers planning to travel on Sunday morning are also being reminded that the clocks go back one hour on Saturday night.
So far this year, Dublin Airport has handled an extra 1.3 million customers, with passenger numbers up 6% to more than 22.7 million passengers for the first nine months of the year.
Passengers travelling to the US are also facing new security screenings.
Dublin Airport has the following advice for passengers travelling over the bank holiday weekend: