Dublin Airport saw its passenger numbers increase by 8% last year to 21.7 million.
Long-haul traffic at the airport grew with 14% more passengers taking flights to North America and the Middle East. Short-haul traffic also went up, but by a more modest 7%.
Domestic passenger numbers increased by 7% to 72,000 last year.
"Dublin Airport had a very strong year of passenger growth in 2014, adding more than 1.5 million extra passengers and outperforming the average airport growth rates across the European Union,” said Dublin Airport Managing Director, Vincent Harrison.
"The growth was due to a combination of 24 new routes last year and additional flights on 34 existing services."
Passenger traffic to other international destinations – mainly the Middle East and North Africa - increased by 19% to a record 643,000.
About 570,000 additional passengers took flights between Dublin Airport and continental European destinations last year.
Passenger traffic to and from continental Europe, which is the biggest market segment at Dublin Airport, increased by 5% last year to 11.1 million with new routes and extra capacity on existing services.
"Dublin Airport’s transatlantic business set an all-time record last year, as this was the first time that more than 2 million people took transatlantic flights to and from Dublin Airport in a single year," Mr Harrison said.
Airlines such as Ryanair, Aer Lingus, Flybe, British Airways, and WestJet all added new services from Dublin Airport last year and 11 carriers increased capacity on their existing services.
In volume terms, the British market delivered the largest growth last year, as an extra 600,000 people took flights between Dublin and British destinations in 2014.
Almost 7.8 million people travelled between Dublin and Britain by air in 2014, which was an 8% increase on the previous year.