Dublin Airport (Irish: Aerfort Bhaile Átha Cliath) (IATA: DUB, ICAO: EIDW) is an international airport serving Dublin, Ireland. It is operated by DAA (formerly Dublin Airport Authority). The airport is located in Collinstown, 7 km (4.3 mi) north of Dublin, and 3 km (1.9 mi) south of the town of Swords. In 2019, 32.9 million passengers passed through the airport, making it the airport's busiest year on record. It is the 13th busiest airport in Europe, and is the busiest of Ireland's airports by total passenger traffic; it also has the largest traffic levels on the island of Ireland, followed by Belfast International Airport.

The airport has an extensive short and medium haul network, served by an array of carriers, as well as a significant long-haul network focused on North America and the Middle East. It serves as a hub for Ireland's flag carrier Aer Lingus, and is the home base for Europe's largest low-cost carrier Ryanair. British airline TUI Airways also operates a base at the airport.

United States border preclearance services are available at the airport for U.S.-bound passengers. Shannon Airport is the only other airport in Europe to offer this facility.