2 point 6 million people used Dublin Airport in April setting a new record for the month.
The 5 percent increase made it the busiest April in the airport's 78-year history.
European and Transatlantic passenger volumes both grew while domestic traffic dipped during the month.
More than 8.7 million passengers travelled through Dublin Airport in the first four months of the year.
While this summer season they will have flights to 195 destinations in 42 countries, operated by 56 airlines.