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IAD to DEN: distance & flight time
Washington (Washington Dulles International Airport) → Denver (Denver International Airport)
1,449 mi
2,332 km · 1,259 nm
3h 37m
estimated nonstop flight time
-2h
time difference · heading west
See live IAD→DEN fares Phone-only fares on this route — call free
Flight time details
1,449 miles nonstop takes roughly 3h 37m gate to gate, flying west. Add 45–90 minutes per connection if there's no nonstop service. Remember to factor the 2-hour time set-back when reading arrival times on your ticket.
The two airports
- IAD — Washington Dulles International Airport · Washington, United States
- DEN — Denver International Airport · Denver, United States
Distances are great-circle ("as the crow flies") — the same basis airlines use for frequent-flyer miles.
Alternate airports can cut this fare
Flying from or into a nearby airport is the #1 trick our agents use to beat online prices. Call and we'll compare every combination on one call.
Near IAD
Near DEN
- BFK · Buckley Air Force Base12 mi away
- APA · Centennial Airport22 mi away
- BJC · Rocky Mountain Metropolitan Airport24 mi away
- WBU · Boulder Municipal Airport32 mi away
Frequently asked questions
How far is IAD from DEN?
The flight distance from Washington (IAD) to Denver (DEN) is 1,449 miles (2,332 km, 1,259 nautical miles), measured along the great-circle route airlines actually fly.
How long is the flight from IAD to DEN?
A nonstop flight takes about 3h 37m gate to gate. Actual time varies with winds, routing and season — eastbound transatlantic flights, for example, are usually faster than the return.
What is the time difference between Washington and Denver?
Denver is 2 hours behind Washington.
What is the cheapest way to fly from IAD to DEN?
Compare live fares online, then call CheapoTrav — our agents have unpublished consolidator fares on IAD–DEN that never appear on search engines, with no booking fees.