Passenger numbers in Dublin Airport rose by 17% in March when compared with the same time last year.
More than 2.1 million passengers passed through the airport last month.
There was a 38% increase in the number of passengers going to and from North America.
Traffic to and from continental Europe and the UK was also up.
The increase was driven by the fact that St Patrick's Day and Easter, including the 1916 commemorations, both fell in March.