Outbound
3 hours 25 minutes
Return
3 hours 55 minutes
Daily Flights
10+
Airlines
2
Timezone note
Washington is 2 hours ahead of Denver (Eastern vs Mountain Time).
About this route
Denver to Washington flights
Denver to Washington Dulles is a United hub-to-hub powerhouse route, with the carrier operating the lion's share of daily departures. Frontier adds low-cost competition. The route serves government contractors, military-connected travelers, lobbyists, and tourists visiting the nation's capital from the Mountain West.
IAD's location in northern Virginia means ground transportation timing is critical — landing alerts help drivers avoid sitting in Dulles Toll Road traffic by timing their departure to match actual touchdown. Winter ice storms in the Mid-Atlantic can cause significant delays, while Denver's afternoon thunderstorms affect the outbound leg.
Airlines
Airlines on this route
How it works
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FAQ
Frequently asked questions.
How long is the Denver to Washington Dulles flight?
About 3 hours 25 minutes eastbound and 3 hours 55 minutes on the return.
Which airlines fly DEN to IAD nonstop?
United dominates as both are hubs. Frontier also offers nonstop service.
Is IAD far from downtown DC?
Dulles is about 30 miles from downtown. Landing alerts help drivers time their trip to avoid unnecessary waiting.
Know when they land in Washington
Avoid waiting at arrivals. Get a text the moment their Denver to Washington flight touches down.
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