Greenville–Spartanburg International Airport (IATA: GSP, ICAO: KGSP, FAA LID: GSP) – also known as Roger Milliken Field – is near Greer, South Carolina, United States, midway between Greenville and Spartanburg, the major cities of the Upstate region of South Carolina.

[3] The Federal Aviation Administration (FAA) National Plan of Integrated Airport Systems for 2017–2021 categorized it as a small-hub primary commercial service facility.

GSP opened on October 15, 1962, replacing Greenville Downtown Airport as the primary airline destination in the region.

Having been served by legacy carriers, with large hubs in nearby Atlanta and Charlotte, GSP had long been plagued with high fares.

The arrival of low-cost carriers in recent years has reduced fares and increased passenger figures.

[11] Future planning includes several options, i.e., the expansion of the terminal by 300% of its current capacity and the possibility of the addition of second runway, parallel to the existing one.