Flight
Dublin International Airport is the main airport in and out of Ireland! Most international flights will arrive in Dublin, about a 3 hour drive to the Cliffs of Moher
Flight
Shannon International Airport is about an hour from the Cliffs of Moher, but it offers fewer direct flights from the United States.
Travel Note
The best way to travel around Ireland is by car. However, if you choose not to rent a car, the attached link has information on the best way to get to Doolin via public transportation.