Icelandair will fly a new six-times weekly route between Dublin and Reykjavik, starting next May.
The service will also have connections to and from 20 gateways in North America, giving passengers new transatlantic travel options.
Icelandair will operate its Dublin-Reykjavik service with a Boeing 757-200 aircraft and flights will operate Sunday to Friday.
Flights will depart Keflavik Airport in Reykjavik at 07.30 arriving in Dublin Airport at 09.15, with the return flight departing Dublin Airport at 11.50 arriving in Keflavik at 13.15.
Wow Air has been flying the same route since June 2015, offering 5 times weekly, daily in summer.
Dublin Airport Managing Director Vincent Harrison said Icelandair's arrival would offer customers additional choice for travel to Iceland and also to North America.
He said: "This new service will also provide additional options for North American visitors to get to Ireland, which is great news for the Irish tourism sector and the many thousands of businesses that it supports throughout the country."
When its launches the service, Icelandair will become Dublin Airport's 22nd new scheduled airline since 2010.
