Europe's main airports all have direct flights to Dublin Airport, and even transatlantic flights from Los Angeles and New York fly into Dublin. Dublin Airport is about 12km north from the city center. A ride to the city center in a taxicab will cost you about €20.00. The bus service will cost you €1.70, unless you use the special airport shuttle, which is slightly more expensive (€6.00) but saves you a quarter of an hour on a trip of about 45 minutes.

Trains:

Trains operate countrywide to all parts of Ireland. Train departures are from Connolly and Heuston Train Stations. Visitors traveling from the south and west will arrive at Heuston Station, from where it is a short ride into the center by bus, taxi or tram (Luas). Those arriving from the north, north west , and also from the south east, will arrive at Connolly Station, which is a short walk from O'Connell Street.

By car:

Dublin is very easily reached by car, when you've got used to driving on the left. Probably not all, but most of the bigger roads lead to, or at least refer to, Dublin. The don't refer to the parking problem in Dublin itself. You might consider leaving your car outside the city center and exploring Dublin on foot. Since the center is not that big, this is probably the best way anyway