Ellinikon International Airport, sometimes spelled Hellinikon (Greek: Ελληνικόν) was the international airport of Athens, Greece for sixty years up until 2001.
The airport was built in 1938. The Nazis invaded Greece in 1941, and Kalamaki Airfield (as the site was then known) was used as a Luftwaffe air base during the occupation. After World War II, the Greek government allowed the United States to use the airport from 1945 until 1993.
The airport was the base of operations by the Greek national carrier Olympic Airways.