Airlines at Greenville-Spartanburg International Airport (GSP)
Greenville/Greer/Spartanburg, South Carolina KGSP #89 US airport by passengers
Airlines operating at GSP, ranked by number of departures.
On-time performance at GSP
Based on 3,855 departures from May 2026 to July 2026. A flight counts as late when it leaves 15 or more minutes after schedule.
22.8%Departures late
27.9%Arrivals late
2.27%Cancelled
19.3 minAverage departure delay
| Airline | Departures | Late |
|---|---|---|
| Delta Air Lines | 876 | 13.7% |
| Envoy Air | 667 | 24.7% |
| PSA Airlines | 608 | 28.3% |
| Republic Airways | 538 | 16.5% |
| Southwest Airlines | 459 | 28.3% |
| SkyWest Airlines | 245 | 20.0% |
| American Airlines | 203 | 30.0% |
| Allegiant Air | 168 | 42.3% |
Source: Bureau of Transportation Statistics, On-Time Performance of reporting carriers. Smaller regional carriers and some airlines are not included.
Airline presence
Allegiant, American, Delta, Southwest and United serve GSP. The terminal has 13 gates across the main terminal and two concourses.