£97 Cheap Flights from Washington (IAD) to Denver (DEN)

View £97 flight on Thu, 13 Nov 2025Opens in a new window

Popular airlines from Washington Dulles International Airport (IAD) to Denver International Airport (DEN)

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Cheap Flights from Washington (IAD) to Denver (DEN)

Prices were available within the past 7 days and start at £97 for one-way flights and £359 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Alaska Airlines
Sat, 8 Nov - Sat, 15 Nov
IAD
Washington
DEN
Denver
£359 Return, found 5 days ago
£359
Return
found 5 days ago
Select Alaska Airlines flight, departing Sat, 8 Nov from Washington to Denver, returning Sat, 15 Nov, priced at £359 found 5 days ago
Alaska Airlines
Fri, 5 Dec - Mon, 8 Dec
IAD
Washington
DEN
Denver
£381 Return, found 2 hours ago
£381
Return
found 2 hours ago
Select Alaska Airlines flight, departing Fri, 5 Dec from Washington to Denver, returning Mon, 8 Dec, priced at £381 found 2 hours ago
Alaska Airlines
Wed, 17 Dec - Wed, 24 Dec
IAD
Washington
DEN
Denver
£441 Return, found 3 days ago
£441
Return
found 3 days ago
Select Alaska Airlines flight, departing Wed, 17 Dec from Washington to Denver, returning Wed, 24 Dec, priced at £441 found 3 days ago
Alaska Airlines
Fri, 5 Dec - Mon, 8 Dec
IAD
Washington
DEN
Denver
£454 Return, found 2 hours ago
£454
Return
found 2 hours ago
Select Alaska Airlines flight, departing Fri, 5 Dec from Washington to Denver, returning Mon, 8 Dec, priced at £454 found 2 hours ago
Alaska Airlines
Mon, 6 Oct - Sat, 11 Oct
IAD
Washington
DEN
Denver
£467 Return, found 3 days ago
£467
Return
found 3 days ago
Select Alaska Airlines flight, departing Mon, 6 Oct from Washington to Denver, returning Sat, 11 Oct, priced at £467 found 3 days ago
Alaska Airlines
Fri, 5 Dec - Mon, 8 Dec
IAD
Washington
DEN
Denver
£476 Return, found 2 hours ago
£476
Return
found 2 hours ago
Select Alaska Airlines flight, departing Fri, 5 Dec from Washington to Denver, returning Mon, 8 Dec, priced at £476 found 2 hours ago
Alaska Airlines
Mon, 6 Oct - Sat, 11 Oct
IAD
Washington
DEN
Denver
£487 Return, found 3 days ago
£487
Return
found 3 days ago
Select Alaska Airlines flight, departing Mon, 6 Oct from Washington to Denver, returning Sat, 11 Oct, priced at £487 found 3 days ago
Alaska Airlines
Mon, 6 Oct - Sat, 11 Oct
IAD
Washington
DEN
Denver
£493 Return, found 3 days ago
£493
Return
found 3 days ago
Select Alaska Airlines flight, departing Mon, 6 Oct from Washington to Denver, returning Sat, 11 Oct, priced at £493 found 3 days ago
Alaska Airlines
Fri, 10 Oct - Tue, 14 Oct
IAD
Washington
DEN
Denver
£534 Return, found 2 days ago
£534
Return
found 2 days ago
Select Alaska Airlines flight, departing Fri, 10 Oct from Washington to Denver, returning Tue, 14 Oct, priced at £534 found 2 days ago
Alaska Airlines
Thu, 28 May - Sun, 31 May
IAD
Washington
DEN
Denver
£537 Return, found 2 hours ago
£537
Return
found 2 hours ago
Select Alaska Airlines flight, departing Thu, 28 May from Washington to Denver, returning Sun, 31 May, priced at £537 found 2 hours ago

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

April is typically the cheapest month to fly

From £89 - £250 per traveller.
Flight from Washington to Denver route information
Origin airport
Washington Dulles Intl.
Destination airport
Denver Intl.
Return price
£359
Distance
2318 km
Average flight time
1 hour 44 mins

Compare flights from Washington to Denver easily and book with confidence

For travelling on business or for pleasure, Expedia makes it easy to book your flights from Washington to Denver. Operating between them 23 flights per day, 20 airlines cover the route. And Avianca, Southwest Airlines, ITA Airways, Copa Airlines, Brussels Airlines, Lufthansa, United Airlines, Ethiopian Airlines fly direct, getting you to Denver Intl. in just 0hours. If you have a preferred carrier, use our advanced search tool to find the right flight from Washington Dulles Intl. to Denver Intl..  

To make things even better, in the advanced search, you can also choose to fly economy, premium economy, business or first class, select your maximum number of stops, and pick your preferred departure and arrival time. You can also opt for refundable and direct flights. 

Grab a great deal on your flight from Washington Dulles Intl. (IAD) to Denver Intl. (DEN)

The easiest way to view the best deals on flights from Washington to Denver today is to enter your travel dates and hit search. From here, you can sort your results by price to see the cheapest flights first. Right now, return flights from Washington Dulles Intl. to Denver Intl. start at just £359 and range up to £537.  

To find an even better deal, try  

  • being flexible on your dates – midweek flights can be cheaper
  • looking for other airports near Washington and Denver
  • booking your flight during November, the cheapest month on this route
  • varying your flight times – early morning and late at night are sometimes cheaper 

Why you should book your Washington to Denver flight with Expedia!

We cater for all flight types, cabin classes and airlines. So whether you’re booking flights from Washington Dulles Intl. to Denver Intl. for a budget break or a business trip with a bit of pleasure thrown in, we make it easy to secure the seat that’s right for you.  

Thanks to our supersized inventory that offers great choice all in one place, you know you’ll get a great deal with Expedia. Especially if you bundle your flight together with your hotel, you will unlock amazing savings. For added peace of mind, you can choose flexible bookings or filter to find refundable options, so you won’t pay a fee to change your flight.  

Frequently asked questions

How much is a flight from Washington Dulles Intl. Airport (IAD) to Denver Airport?
If you're travelling from IAD to Denver Airport, round-trip flights start from £359. This figure is based on airfares listed within the last 7 days on Expedia for flights departing within the next year, so don't hang around. Book today and save yourself both money and time. Prices and availability are subject to change. Additional terms apply.
Do I need to pay a cancellation fee if I cancel my flight from IAD to DIA airport?
We get that things come up unexpectedly, so we've made it as easy as possible for you to cancel your trip online. Just head to the Customer Service Portal and follow the instructions.
How do I find cheap flights from Washington Dulles Intl. Airport (IAD) to Denver Intl. Airport (DEN) that have flexible change policies?
Many airlines offer the option to reschedule your flight without a change fee. All you pay is the difference between the original flight and the new flight. When you're searching for Dulles Intl. Airport to DEN flights, you'll see a "no change fees" filter for you to select.
How far is the flight from Dulles Intl. Airport to DEN?
The flight distance between IAD and DEN is 2,300 kilometres. Listen to some music or bury your nose in a book and the trip will whiz by.
Which airlines fly direct from IAD to Denver Airport?
A popular airline that operates on the route from Dulles Intl. Airport to Denver Airport is United Airlines (UA). It offers 182 flights every month. Another airline operating on this route is Southwest Airlines (WN). You'll have 56 flights a month to select from.
Are IAD to DEN flight tickets cheaper when they're purchased at the last minute?
Tickets from Washington Dulles Intl. Airport (IAD) to DIA airport are available up to 12 months before departure on Expedia. And although you may occasionally nab a fantastic last-minute deal, it's never something you can count on. Also, booking your flights ahead of time means you'll have more choices — and you can avoid getting trapped in the dreaded middle seat! We regularly update our fares to bring you the best bargains, so check back often for all the latest specials.

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