Ellinikon International Airport (IATA: ATH, ICAO: LGAT), sometimes spelled Hellinikon, was an international airport that served Athens, Greece, for 63 years. Following its closure on 28 March 2001, it was replaced in service by the new Athens International Airport Eleftherios Venizelos. The airport was located 7 kilometres (4.3 mi) south of Athens, and just west of Glyfada. It was named after the village of Elliniko, now a suburb of Athens. The airport had an official capacity of 11 million passengers per year, but served 13.5 million passengers during its last year of operations. A large portion of the site was converted into a stadium and sports facilities for the 2004 Olympic Games.

Athens International Airport Eleftherios Venizelos, commonly initialised as AIA, is the largest international airport in Greece, serving the city of Athens and region of Attica. It began operation on 28 March 2001 and is the main base of Aegean Airlines, as well as other smaller Greek airlines. It replaced the old Ellinikon International Airport.