Great-circle route DEN → IAD. Faint dots are other airports, for geographic context. Download this map — free to reuse with a link back to this page.
The flight time from Denver to Washington is approximately 3h 25m nonstop. The distance is 1,449 miles (2,332 km). There are about 11 nonstop flights from Denver to Washington per day.
That is a great-circle estimate, not a scheduled block time. An airline's published time will differ by roughly 15 to 45 minutes depending on routing, winds and taxi.
| Route | Est. time | Distance | Frequency | Airlines |
|---|---|---|---|---|
| DEN → IAD Denver International Airport to Washington Dulles International Airport |
3h 25m | 1,449 mi | 53/wk | United Airlines |
| DEN → DCA Denver International Airport to Ronald Reagan Washington National Airport |
3h 27m | 1,472 mi | 26/wk | Frontier Airlines, United Airlines |
Frequencies come from our most recent schedule sample. Where a pairing shows “—” we track it as an operating nonstop but hold no schedule sample for it — we would rather show nothing than guess.
2 airlines fly nonstop from Denver to Washington, including Frontier Airlines, United Airlines.
Recent scheduled departures on this route have used the Boeing 737-900, Boeing 757-300, Airbus A320, Airbus A320 NEO.
Aircraft assignments change by season and by time of day.
The distance from Denver to Washington is 1,449 miles, or 2,332 kilometres.
| Great-circle distance | 1,449 mi |
| Kilometres | 2,332 km |
| Nautical miles | 1,259 nmi |
Measured airport to airport. The actual track is longer — aircraft follow airways, avoid restricted airspace and route around weather.
Yes. 2 airlines fly it nonstop, with about 79 departures a week, across 2 airport pairings. The route is in our live nonstop dataset, last seeded 2026-07-07.
About 3h 25m in the air on the DEN–IAD nonstop. That is a great-circle estimate from the 1,449-mile distance, not a scheduled block time — an airline's published time will differ by roughly 15 to 45 minutes depending on routing, winds and taxi.
1,449 miles (2,332 km) great-circle between Denver International Airport and Washington Dulles International Airport.
Frontier Airlines, United Airlines.
Recent scheduled departures have used the Boeing 737-900, Boeing 757-300, Airbus A320, Airbus A320 NEO. Assignments change by season and by time of day.
DEN to IAD, DEN to DCA. Flight times differ slightly between them because the airports are not in the same place.
