S$155 Cheap Flights from Washington to Denver

View S$155 flight on Wed, 10 Dec, 2025Opens in a new window

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

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Cheap Flights from Washington to Denver (IAD-DEN)

Prices were available within the past 7 days and start at S$155 for one-way flights and S$309 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Delta
Wed, 10 Dec - Sat, 13 Dec
IAD
Washington
DEN
Denver
S$309 Return, found 6 days ago
S$309
Return
found 6 days ago
Select Delta flight, departing Wed, 10 Dec from Washington to Denver, returning Sat, 13 Dec, priced at S$309 found 6 days ago
Delta
Wed, 10 Dec - Sat, 13 Dec
IAD
Washington
DEN
Denver
S$349 Return, found 6 days ago
S$349
Return
found 6 days ago
Select Delta flight, departing Wed, 10 Dec from Washington to Denver, returning Sat, 13 Dec, priced at S$349 found 6 days ago
Delta
Wed, 10 Dec - Sat, 13 Dec
IAD
Washington
DEN
Denver
S$362 Return, found 6 days ago
S$362
Return
found 6 days ago
Select Delta flight, departing Wed, 10 Dec from Washington to Denver, returning Sat, 13 Dec, priced at S$362 found 6 days ago
Delta
Wed, 10 Dec - Sat, 13 Dec
IAD
Washington
DEN
Denver
S$375 Return, found 6 days ago
S$375
Return
found 6 days ago
Select Delta flight, departing Wed, 10 Dec from Washington to Denver, returning Sat, 13 Dec, priced at S$375 found 6 days ago
Delta
Wed, 10 Dec - Sat, 13 Dec
IAD
Washington
DEN
Denver
S$375 Return, found 6 days ago
S$375
Return
found 6 days ago
Select Delta flight, departing Wed, 10 Dec from Washington to Denver, returning Sat, 13 Dec, priced at S$375 found 6 days ago
United
Wed, 10 Dec - Sat, 13 Dec
IAD
Washington
DEN
Denver
S$388 Return, found 6 days ago
S$388
Return
found 6 days ago
Select United flight, departing Wed, 10 Dec from Washington to Denver, returning Sat, 13 Dec, priced at S$388 found 6 days ago
Delta
Wed, 10 Dec - Sat, 13 Dec
IAD
Washington
DEN
Denver
S$400 Return, found 6 days ago
S$400
Return
found 6 days ago
Select Delta flight, departing Wed, 10 Dec from Washington to Denver, returning Sat, 13 Dec, priced at S$400 found 6 days ago
Delta
Wed, 10 Dec - Sat, 13 Dec
IAD
Washington
DEN
Denver
S$402 Return, found 6 days ago
S$402
Return
found 6 days ago
Select Delta flight, departing Wed, 10 Dec from Washington to Denver, returning Sat, 13 Dec, priced at S$402 found 6 days ago
American Airlines
Wed, 10 Dec - Sat, 13 Dec
IAD
Washington
DEN
Denver
S$413 Return, found 6 days ago
S$413
Return
found 6 days ago
Select American Airlines flight, departing Wed, 10 Dec from Washington to Denver, returning Sat, 13 Dec, priced at S$413 found 6 days ago
Delta
Wed, 10 Dec - Sat, 13 Dec
IAD
Washington
DEN
Denver
S$414 Return, found 6 days ago
S$414
Return
found 6 days ago
Select Delta flight, departing Wed, 10 Dec from Washington to Denver, returning Sat, 13 Dec, priced at S$414 found 6 days ago
Delta
Wed, 10 Dec - Sat, 13 Dec
IAD
Washington
DEN
Denver
S$416 Return, found 6 days ago
S$416
Return
found 6 days ago
Select Delta flight, departing Wed, 10 Dec from Washington to Denver, returning Sat, 13 Dec, priced at S$416 found 6 days ago
Delta
Wed, 10 Dec - Sat, 13 Dec
IAD
Washington
DEN
Denver
S$426 Return, found 6 days ago
S$426
Return
found 6 days ago
Select Delta flight, departing Wed, 10 Dec from Washington to Denver, returning Sat, 13 Dec, priced at S$426 found 6 days ago

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

April is typically the cheapest month to fly

From S$157 - S$625 per traveller.
Washington to Denver route information
Origin airport
Washington Dulles Intl.
Destination airport
Denver Intl.
Return price
S$308
Distance
2318 km
Average flight time
1 hour 59 mins

Perfect flights from Washington to Denver

Your Journey from Washington to Denver

Start your unforgettable journey with Expedia. Our broad selection of flights from Washington to Denver caters to every travel need. Whether you're yearning for a romantic escape, a solo adventure, or a cultural immersion, we've got you covered.
 

Choosing Your Ideal Flight

With Expedia, you have access to a wide range of airlines, including Delta, United, American Airlines. Our selection of flights from Washington Dulles Intl. to Denver Intl. caters to every traveler's requirements, ensuring your journey aligns with your schedule. With options from 20 airlines, you're bound to find the perfect flight.
 

Maximizing Value with Washington to Denver Flights

Experience the joy of finding cheap flights from Washington Dulles Intl. to Denver Intl. that fit your budget. Keep an eye out for our special deals and discounts, and check our flexible one-way fares from S$155 and roundtrip prices from S$309*.
 

Pre-Flight Essentials

Ensure a smooth journey from Washington to Denver with Expedia. From information about check-in times and in-flight amenities to guidance on baggage policies, we provide all the essentials to prepare you for your flight.
 

Experience the Vibrant Denver

Picture yourself stepping off the plane in Denver and immersing yourself in the unique atmosphere of . From local markets to cultural festivals, each city offers its distinct charm. Make the most of your trip by exploring local attractions and indulging in the local cuisine. With Expedia, explore all this and more, tailored to your budget.
 

Added Convenience on Your Washington to Denver Flight

Traveling with Expedia is more than just a flight. We offer details about in-flight amenities, baggage policies, and more to ensure a smooth and hassle-free journey. Choose from our variety of airlines and embark on a memorable journey from Washington to Denver.
 

Beyond the Flight – Exploring Denver

With Expedia, your adventure extends beyond the flight. Explore Denver at your own pace by renting a car or booking a hotel. Discover hidden gems off the beaten path and create unforgettable memories.
 

Book Your Flight from Washington to Denver with Confidence

Planning your next great adventure is a breeze with Expedia. Our user-friendly platform, unbeatable prices, and round-the-clock customer support make your travel experience seamless and stress-free. Embark on your journey from Washington to Denver with confidence. Book your travel arrangements with Expedia today.
 
*Note: Prices may vary based on availability and are subject to change.

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 S$309. 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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*Available to Expedia members.