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 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.
The former airport is now the site of a major development for coastal Athens, which came under criticism because well-preserved historic buildings (from the 1930s) were demolished. In 2020, construction began on the Hellenikon Metropolitan Park, a complex consisting of luxury homes, hotels, a casino, the Inspire Athens tower, a marina, shops, and offices. The first phase is supposed to be ready in between 2027 and 2028.