Dublin, Ireland (DUB)

In Brief: Dublin Airport is located 10 km (about 6 miles) north of the city. It's a major base for both Aer Lingus and Ryanair, and also handles several Centralwings routes. In terms of sheer numbers, it's one of the most budget airline-friendly airports around. Transportation: Public buses cost between €1.60 and €1.90 to traverse the distance between central Dublin and the airport, depending on how far the journey in question is. Airlink buses, which travel to Dublin's Central Bus Station, cost €6.