Greenville/Greer/Spartanburg (GSP) to Baltimore (BWI) flights
Southwest Airlines flies nonstop from Greenville-Spartanburg International Airport to Baltimore/Washington International Thurgood Marshall Airport, with about 14 flights a week in July 2026. The 426-mile flight takes about 1h 21m gate to gate.
- Distance
- 426 mi · 686 km
- Flight time
- 1h 21m
- Airlines
- 1
- Seats filled
- 70%
Airlines flying GSP to BWI
| Airline | Flights a week | Aircraft | Passengers (12 months) | Flight time |
|---|---|---|---|---|
| Southwest Airlines | 14 | Boeing 737-700 / MAX 7, Boeing 737-800, Boeing 737 MAX 8 | 70,441 | 1h 21m |
Airlines are the operating carrier: regional airlines such as SkyWest or Horizon often fly under a larger airline's brand.
GSP to BWI flight schedule
5 flight numbers flew this route in August 2026, 1 of them almost daily. The first usually leaves at 8:15am and the last at 6:55pm. Times are local and can change; check with the airline before you book.
| Flight | Departs | Arrives | Days flown in August 2026 | On time (12 months) |
|---|---|---|---|---|
| WN 1091Southwest Airlines | 8:15am | 9:40am | 8 | n/a |
| WN 1838Southwest Airlines | 8:40am | 10:05am | 20 | 95% |
| WN 771Southwest Airlines | 1:20pm | 2:50pm | 12 | 92% |
| WN 2148Southwest Airlines | 4:40pm | 6:05pm | 12 | 64% |
| WN 1839Southwest Airlines | 6:55pm | 8:20pm | 4 | n/a |
Is GSP to BWI on time?
From September 2025 to August 2026, 90% of 719 flights arrived within 15 minutes of schedule and 1.7% were cancelled. Flights leaving around 7am were the most punctual (96%), those around 8pm the least (69%). Most delay time was caused by late-arriving aircraft (55%).
| Airline | Flights | On time | Average delay | Cancelled |
|---|---|---|---|---|
| Southwest Airlines | 719 | 90% | 7 min | 1.7% |
Airlines as sold: flights operated by regional partners count under the airline on the ticket. Average delay is across all completed flights, early arrivals counted as zero.
On-time arrivals by departure time
| Scheduled departure | Flights | On time, relative | On time |
|---|---|---|---|
| 7am to 8am | 77 | 96% | |
| 8am to 9am | 242 | 94% | |
| 10am to 11am | 28 | 100% | |
| 1pm to 2pm | 180 | 86% | |
| 3pm to 4pm | 19 | 90% | |
| 4pm to 5pm | 41 | 82% | |
| 6pm to 7pm | 45 | 82% | |
| 8pm to 9pm | 36 | 69% |
Flights by month
| Month | Flights | Flights, relative | Passengers |
|---|---|---|---|
| August 2025 | 62 | 6,306 | |
| September 2025 | 60 | 6,441 | |
| October 2025 | 59 | 6,781 | |
| November 2025 | 56 | 5,840 | |
| December 2025 | 60 | 5,879 | |
| January 2026 | 56 | 3,393 | |
| February 2026 | 53 | 4,015 | |
| March 2026 | 61 | 5,869 | |
| April 2026 | 60 | 5,760 | |
| May 2026 | 62 | 6,646 | |
| June 2026 | 60 | 6,831 | |
| July 2026 | 60 | 6,745 |
Related
Source: US Department of Transportation, T-100 Segment data, August 2025 to July 2026.