The second-busiest airport in South Carolina, Greenville-Spartanburg International Airport (GSP) is located in the Upstate region of South Carolina. It has one runway and one terminal with two concourses (Concourse A and Concourse B) with a total of 13 gates. Allegiant Air, American Eagle, Delta Air Lines, Southwest Airlines, and United Express fly between GSP and other destinations in the eastern half of the United States. About 1.9 million travelers used the airport in 2014. Passenger amenities at Greenville-Spartanburg Airport include an ATM, conference rooms, a restaurant and snack bars, a gift shop and WIFI internet.