Dublin Airport is split into two separate terminal buildings, which are numbered Terminal 1 and Terminal 2, with short-haul, medium-haul and long-haul flights spread across both terminals.
Terminal 1 opened in 1972 and facilitates flights from the majority of airlines that fly from the airport, including Ryanair.
Although Terminal 1 handles flights from more airlines than Terminal 2 does, flights from airlines at Terminal 1 are less generally less regular, which means that the two terminals have a fairly even split in terms of passenger traffic.
The terminal has undergone a number of expansions since being built, with several renovations since the start of the 2000s.
Terminal 2 opened in 2010. It facilitates flights from Aer Lingus, American Airlines, Delta Air Lines, Emirates, Norwegian and United Airlines.
Terminal 2 is also where the vast majority of airport and airline lounges are located, with five of the six lounges at the airport currently located at Terminal 2.