Great-circle route IAD → DEN. 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 Washington to Denver is approximately 3h 25m nonstop. The distance is 1,449 miles (2,332 km). There are about 13 nonstop flights from Washington to Denver 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 |
|---|---|---|---|---|
| IAD → DEN Washington Dulles International Airport to Denver International Airport |
3h 25m | 1,449 mi | 62/wk | United Airlines |
| DCA → DEN Ronald Reagan Washington National Airport to Denver International Airport |
3h 27m | 1,472 mi | 27/wk | Frontier Airlines, Southwest 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.
3 airlines fly nonstop from Washington to Denver, including Frontier Airlines, Southwest Airlines, United Airlines.
Recent scheduled departures on this route have used the Airbus A320, Boeing 757-300, Boeing 737-900, Boeing 737-800 and 2 other types.
Aircraft assignments change by season and by time of day.
The distance from Washington to Denver 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. 3 airlines fly it nonstop, with about 89 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 IAD–DEN 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 Washington Dulles International Airport and Denver International Airport.
Frontier Airlines, Southwest Airlines, United Airlines.
Recent scheduled departures have used the Airbus A320, Boeing 757-300, Boeing 737-900, Boeing 737-800. Assignments change by season and by time of day.
IAD to DEN, DCA to DEN. Flight times differ slightly between them because the airports are not in the same place.
