The main airports that North American travelers will probably pass through are near Shannon (SNN) and Dublin (DUB).
Dublin’s airport is located a short way out of the city but it is well-equipped with everything travelers could possibly need. It can be found on the upper eastern side of the island.
Meanwhile, Shannon Airport is much smaller and there aren’t many facilities available at the airport itself. However, it can be cheaper to fly into Shannon instead of Dublin if you’re visiting from the States.
The trouble with using this airport is that the nearest small town is a good thirty minutes away and there’s not much there. A couple of larger towns can be found if you’re willing to stay on the road for another half-hour. This airport nonetheless provides easy access to a lot of popular destinations as it is located on the midwestern coast of the island.
Other Irish airports can be found near Belfast (BFS), Cork (ORK), Waterford (WAT), and Kerry (KIR).