Greenville/Greer/Spartanburg (GSP) to Denver (DEN) flights
United Airlines flies nonstop from Greenville-Spartanburg International Airport to Denver International Airport, with about 6 flights a week in July 2026. The 1,278-mile flight takes about 3h 39m gate to gate.
- Distance
- 1,278 mi · 2,057 km
- Flight time
- 3h 39m
- Airlines
- 1
- Seats filled
- 89%
Airlines flying GSP to DEN
| Airline | Flights a week | Aircraft | Passengers (12 months) | Flight time |
|---|---|---|---|---|
| United Airlines | 6 | Airbus A320-100/200, Airbus A319 | 26,741 | 3h 32m |
| SkyWest AirlinesSeasonal or ended | n/a | Embraer E175 | 9,036 | 3h 49m |
Airlines are the operating carrier: regional airlines such as SkyWest or Horizon often fly under a larger airline's brand.
GSP to DEN flight schedule
2 flight numbers flew this route in August 2026, 1 of them almost daily. The first usually leaves at 4:15pm and the last at 4:33pm. 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) |
|---|---|---|---|---|
| UA 1866United Airlines | 4:15pm | 5:55pm | 10 | 70% |
| UA 2864United Airlines | 4:33pm | 6:02pm | 21 | 65% |
Is GSP to DEN on time?
From September 2025 to August 2026, 82% of 364 flights arrived within 15 minutes of schedule and 1.4% were cancelled. Most delay time was caused by air traffic control and airport congestion (50%).
| Airline | Flights | On time | Average delay | Cancelled |
|---|---|---|---|---|
| United Airlines | 364 | 82% | 13 min | 1.4% |
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
Flights by month
| Month | Flights | Flights, relative | Passengers |
|---|---|---|---|
| August 2025 | 31 | 3,796 | |
| September 2025 | 30 | 3,409 | |
| October 2025 | 31 | 3,605 | |
| November 2025 | 30 | 3,277 | |
| December 2025 | 30 | 2,097 | |
| January 2026 | 28 | 1,871 | |
| February 2026 | 28 | 1,759 | |
| March 2026 | 29 | 2,183 | |
| April 2026 | 30 | 2,132 | |
| May 2026 | 31 | 3,743 | |
| June 2026 | 30 | 4,085 | |
| July 2026 | 28 | 3,912 |
Related
Source: US Department of Transportation, T-100 Segment data, August 2025 to July 2026.