KGSP is the ICAO code for Greenville Spartanburg International Airport (IATA GSP), located in Greer, SC.
Greenville–Spartanburg International Airport – 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. The airport is the third-busiest airport in South Carolina, after Charleston International Airport, and Myrtle Beach International Airport with over 3.04 million passengers in 2025, the most in its history.
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