Shannon Airport established the world's first duty free shop in 1947.
SNN is one of the hubs of Irish international and domestic airline Aer Lingus, which is also one of five companies providing aircraft maintenance at the airport.
Shannon is also one of the hubs of Irish low budget airline Ryanair.
The airport can handle landings by airplanes of all sizes.
The United States - Ireland bilateral requires that air carriers operating between the United States and Ireland must provide capacity into Dublin Airport and Shannon. The rule came from the days when aircraft did not have a long range and were forced to stop at Shannon.
Airlines using Shannon: