This depends on numerous factors, mainly your point of departure. Here are some of the most popular routes to Ireland as well as their average travel times: Washington, DC (IAD-Washington Dulles Intl.) to Dublin Airport (DUB) - 6 hours and 55 minutes New York, NY (JFK-John F. Kennedy Intl.) to Dublin Airport (DUB) - 6 hours and 30 minutes Newark, NJ (EWR-Liberty Intl.) to Dublin Airport (DUB) - 6 hours and 50 minutes