High Quality Content by WIKIPEDIA articles! Shannon Airport, (Irish: Aerfort na Sionainne) (IATA: SNN, ICAO: EINN) is one of the Republic of Ireland`s three primary airports along with Dublin and Cork. In 2010 around 1,750,000 passengers passed through the airport, making it the third busiest airport in the Republic of Ireland after Dublin and Cork, and the fifth busiest airport on the island of Ireland after Dublin, Belfast International, Belfast City and Cork. The airport is located in Shannon, County Clare and mainly serves Limerick, Ennis, Galway and the West coast of Ireland.