Saipan International Airport, also known as Francisco C. Ada/Saipan International Airport, is a public airport located on Saipan Island in the United States Commonwealth of the Northern Mariana Islands. The airport is owned by Commonwealth Ports Authority. Its airfield was previously known as Aslito and Isely Field. This airport is assigned a three-letter location identifier of GSN by the Federal Aviation Administration, but the International Air Transport Association airport code is SPN.