Washington (DCA) to Denver (DEN) flights
Frontier Airlines, United Airlines fly nonstop from Ronald Reagan Washington National Airport to Denver International Airport, with about 24 flights a week in July 2026. The 1,476-mile flight takes about 4h 5m gate to gate.
- Distance
- 1,476 mi · 2,375 km
- Flight time
- 4h 5m
- Airlines
- 2
- Seats filled
- 86%
Airlines flying DCA to DEN
| Airline | Flights a week | Aircraft | Passengers (12 months) | Flight time |
|---|---|---|---|---|
| Frontier Airlines | 18 | Airbus A320neo, Airbus A320-100/200, Airbus A321 | 156,564 | 4h 6m |
| United Airlines | 6 | Airbus A321, Boeing 757-300, Boeing 737-800 | 63,871 | 4h 4m |
Airlines are the operating carrier: regional airlines such as SkyWest or Horizon often fly under a larger airline's brand.
DCA to DEN flight schedule
4 flight numbers flew this route in August 2026, 4 of them almost daily. The first usually leaves at 7:00am and the last at 6:00pm. 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) |
|---|---|---|---|---|
| F9 685Frontier Airlines | 7:00am | 9:01am | 31 | 86% |
| F9 687Frontier Airlines | 1:59pm | 3:53pm | 27 | 81% |
| UA 746United Airlines | 4:20pm | 6:25pm | 31 | 78% |
| F9 689Frontier Airlines | 6:00pm | 8:07pm | 27 | 67% |
Is DCA to DEN on time?
From September 2025 to August 2026, 78% of 1,347 flights arrived within 15 minutes of schedule and 0.9% were cancelled. Flights leaving around 7am were the most punctual (87%), those around 6pm the least (67%). Most delay time was caused by air traffic control and airport congestion (42%).
| Airline | Flights | On time | Average delay | Cancelled |
|---|---|---|---|---|
| Frontier Airlines | 983 | 78% | 19 min | 1% |
| United Airlines | 364 | 78% | 20 min | 0.5% |
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 | 210 | 87% | |
| 8am to 9am | 149 | 84% | |
| 1pm to 2pm | 184 | 78% | |
| 2pm to 3pm | 135 | 84% | |
| 4pm to 5pm | 363 | 78% | |
| 6pm to 7pm | 306 | 67% |
Flights by month
| Month | Flights | Flights, relative | Passengers |
|---|---|---|---|
| August 2025 | 115 | 18,947 | |
| September 2025 | 111 | 18,359 | |
| October 2025 | 115 | 19,875 | |
| November 2025 | 112 | 18,310 | |
| December 2025 | 114 | 19,842 | |
| January 2026 | 111 | 16,815 | |
| February 2026 | 104 | 16,284 | |
| March 2026 | 114 | 18,116 | |
| April 2026 | 108 | 18,233 | |
| May 2026 | 115 | 19,598 | |
| June 2026 | 110 | 18,548 | |
| July 2026 | 107 | 17,666 |
Related
Source: US Department of Transportation, T-100 Segment data, August 2025 to July 2026.