The airport was built in the late 1970s to replace its predecessor, Ilopango International Airport, which is now used for regional, air taxi, military, and charter aviation. The airport was built on the initiative and request of the then President, Arturo Armando Molina. Funding for this project was provided through the Government of Japan, Engineering and building came under the direction of Hazama Ando (then Hazama Gumi). The electrical work for all lighting and communications was completed by Toshiba (then TOKYO SHIBAURA ELECTRIC). The Airport entered in operation on 31 January 1980 as Cuscatlan International Airport (), with its first flight being a TACA airliner bound for Guatemala City.