£110 Cheap United flights from Washington to Denver (IAD→DEN)

View £110 flight on Mon, 20 Apr 2026Opens in a new window

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United flights from Washington to Denver (IAD→DEN)

Prices were available within the past 7 days and start at £110 for one-way flights and £204 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

United
Tue, 21 Apr - Sun, 26 Apr
IAD
Washington
DEN
Denver
£204 Return, found 4 days ago
£204
Return
found 4 days ago
Select United flight, departing Tue, 21 Apr from Washington to Denver, returning Sun, 26 Apr, priced at £204 found 4 days ago
United
Sun, 19 Apr - Thu, 23 Apr
IAD
Washington
DEN
Denver
£310 Return, found 4 days ago
£310
Return
found 4 days ago
Select United flight, departing Sun, 19 Apr from Washington to Denver, returning Thu, 23 Apr, priced at £310 found 4 days ago
United
Sun, 18 Oct - Sun, 1 Nov
IAD
Washington
DEN
Denver
£342 Return, found 2 days ago
£342
Return
found 2 days ago
Select United flight, departing Sun, 18 Oct from Washington to Denver, returning Sun, 1 Nov, priced at £342 found 2 days ago
United
Wed, 21 Oct - Thu, 22 Oct
IAD
Washington
DEN
Denver
£343 Return, found 1 day ago
£343
Return
found 1 day ago
Select United flight, departing Wed, 21 Oct from Washington to Denver, returning Thu, 22 Oct, priced at £343 found 1 day ago
United
Wed, 21 Oct - Thu, 22 Oct
IAD
Washington
DEN
Denver
£347 Return, found 1 day ago
£347
Return
found 1 day ago
Select United flight, departing Wed, 21 Oct from Washington to Denver, returning Thu, 22 Oct, priced at £347 found 1 day ago

Find the cheapest month to fly from Washington (IAD) to Denver (DEN)

April is typically the cheapest month to fly

From £91 - £384 per traveller.
Flight from Washington to Denver route information
Origin airport
Washington Dulles Intl.
Destination airport
Denver Intl.
Airlines serving
Alaska Airlines, American Airlines, Delta, United
Popular airline
Alaska Airlines
Distance
2318 km
Average flight time
2 hours 9 mins

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Frequently asked questions

How much is a United Airlines flight from Washington Dulles Intl. Airport (IAD) to Denver Intl. Airport (DEN)?
Make use of the "Price (lowest to highest)" filter on Expedia to search for cheap United Airlines round-trip flights from £204 from IAD to DEN. Affordable one-way fares from £110 are available too.**These prices were available on Expedia within the past 7 days, for flights departing within the next year. Prices and availability are subject to change. Additional terms apply.
What is the cheapest month to fly from IAD to DEN with United Airlines?
Browse for one-way or return flights to Denver in January or November. You could find a cheap fare with United Airlines during these off-peak travel months.
Does United Airlines fly nonstop from Washington Dulles Intl. Airport (IAD) to Denver Intl. Airport (DEN)?
Depart on one of United Airlines's 42 weekly direct flights from Washington Dulles Intl. Airport (IAD) to Denver Intl. Airport (DEN). To see what's available, enter your travel dates, origin and destination and hit search. Next, apply the "Nonstop" and "Airline" filters.
How long does it take to fly from IAD to DEN with United Airlines?
On average, it takes 4h 4m to fly nonstop from Washington Dulles Intl. Airport (IAD) to Denver Intl. Airport (DEN) with United Airlines.
Which day of the week has the most United Airlines flights from Washington Dulles Intl. Airport (IAD) to Denver Intl. Airport (DEN)?
United Airlines operates the most flights from Washington Dulles Intl. Airport (IAD) to Denver Intl. Airport (DEN) on Monday. With up to 6 daily departures, you'll get the most options and flexibility on this day.
What airports does United Airlines fly into in Denver?
Denver Intl. Airport (DEN) is the primary Denver hub for United Airlines flights from Washington Dulles Intl. Airport (IAD).
What type of plane does United Airlines fly from Washington Dulles Intl. Airport (IAD) to Denver Intl. Airport (DEN)?
You'll likely be onboard a Boeing 757-300 or a Boeing 737-900 when flying United Airlines from Washington Dulles Intl. Airport (IAD) to Denver Intl. Airport (DEN). However, keep in mind that a different aircraft may be assigned depending on operational demands.
Can I change or cancel my United Airlines flight from Washington Dulles Intl. Airport (IAD) to Denver Intl. Airport (DEN)?
Depending on your fare type, a fee typically applies if you change or cancel your booking more than 24 hours after confirmation. To find flexible plane tickets, select our "No cancel fee" or "Changes included" filter while searching for flights. For more details on cancelling or changing your reservation, visit "Trips," select your flight and click on "Manage Booking."

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