HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
Denver

$169+ Cheap flights from Dulles Intl (IAD) to Denver (DEN)

IAD — DEN
Dec 9 — Dec 161
Wed 12/9
Wed 12/16
1 adult, Economy
We work with more than 300 partners to bring you better travel deals

Find cheap flights from Dulles Intl to Denver with Cheapflights

1. Tell us where you want to go

Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”

2. Select your favorite providers

We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.

3. Compare prices and book

Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.
Cheapflights Tip: The best prices from Washington, D.C. Dulles Intl to Denver Intl are usually found in January or February, booked 77 days in advance, depart on a Wednesday or Saturday and return on a Friday

Cheap flight deals from Dulles Intl to Denver

Cheapest flights from Dulles Intl to Denver

Wed 11/1811:16 am -
1 stop10h 44m
Mon 11/303:52 pm -
1 stop16h 13m
Deal found 11/4$298
Tue 11/1711:16 am -
1 stop10h 44m
Tue 11/2410:51 am -
1 stop9h 11m
Deal found 11/5$299
Tue 12/228:51 pm -
1 stop17h 27m
Mon 12/286:00 am -
1 stop7h 13m
Deal found 11/5$300
Sat 11/2110:47 pm -
1 stop9h 49m
Fri 11/2710:25 am -
1 stop8h 36m
Deal found 11/6$301
Wed 11/1811:16 am -
1 stop10h 44m
Tue 12/18:46 pm -
2 stops40h 02m
Deal found 11/6$302
Fri 11/201:09 pm -
1 stop24h 47m
Fri 11/279:34 am -
1 stop17h 36m
Deal found 11/4$303
Fri 11/271:09 pm -
1 stop13h 45m
Thu 12/310:25 am -
2 stops29h 20m
Deal found 11/6$304
Thu 12/311:18 am -
1 stop7h 47m
Sun 12/69:00 am -
1 stop6h 38m
Deal found 11/7$305
Fri 12/46:42 pm -
2 stops19h 53m
Mon 12/76:59 pm -
2 stops17h 50m
Deal found 11/7$306
Sun 12/139:23 pm -
1 stop26h 07m
Fri 12/186:25 am -
1 stop11h 25m
Deal found 11/9$308
Wed 11/251:05 pm -
2 stops28h 43m
Fri 11/277:50 pm -
1 stop7h 20m
Deal found 11/4$309

Find flight deals from Dulles Intl to Denver

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$299
(Mytrip)

One-way from

$169
(Cheapflightsfares)

Popular in

July

Cheapest in

January

Average price

$505

Good round-trip deal

$452 or less

Good one-way deal

$271 or less
Provider with most accurate pricing for Washington, D.C. Dulles Intl-Denver Intl flight deals.
Search Deals
Provider most trusted by Cheapflights users for Washington, D.C. Dulles Intl-Denver Intl flights.
Search Deals
From Washington, D.C. Dulles Intl to Denver Intl
Search Deals
One-way flight from Washington, D.C. Dulles Intl to Denver Intl
Search Deals
Highest demand for flights based on searches. 14% potential increase in price ($74 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 1% potential price decrease ($9 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in November 2026
Search Deals
Price to beat on a round-trip flight from Washington, D.C. Dulles Intl to Denver Intl.
Search Deals
Price to beat on a one-way flight from Washington, D.C. Dulles Intl to Denver Intl.
Search Deals

Cheapflights Fare Finder

 
Use the filters below to find and compare flights from Washington, D.C. Dulles Intl Airport to Denver that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip
Quickest round-trip

Washington, D.C.Denver

IAD Washington, D.C. Dulles Intl - DEN Denver Intl

IADDEN

Washington, D.C. Dulles Intl

Wed 12/23

10:12 pm-12:15 am

Nonstop4h 03m

Denver Intl

Wed 12/31

12:00 am-2:00 am

Nonstop0h 00m

$229

Washington, D.C.Denver

IAD Washington, D.C. Dulles Intl - DEN Denver Intl

IADDEN

Washington, D.C. Dulles Intl

Tue 12/22

10:12 pm-12:15 am

Nonstop4h 03m

Denver Intl

Wed 12/31

12:00 am-2:00 am

Nonstop0h 00m

$229

Washington, D.C.Denver

IAD Washington, D.C. Dulles Intl - DEN Denver Intl

IADDEN

Washington, D.C. Dulles Intl

Thu 12/10

7:04 pm-11:50 pm

1 stop6h 46m

Denver Intl

Wed 12/31

12:00 am-2:00 am

Nonstop0h 00m

$232

Washington, D.C.Denver

IAD Washington, D.C. Dulles Intl - DEN Denver Intl

IADDEN

Washington, D.C. Dulles Intl

Wed 12/30

7:30 pm-9:33 pm

Nonstop4h 03m

Denver Intl

Wed 12/31

12:00 am-2:00 am

Nonstop0h 00m

$284

Washington, D.C.Denver

IAD Washington, D.C. Dulles Intl - DEN Denver Intl

IADDEN

Washington, D.C. Dulles Intl

Tue 12/29

10:12 pm-12:15 am

Nonstop4h 03m

Denver Intl

Wed 12/31

12:00 am-2:00 am

Nonstop0h 00m

$284

Washington, D.C.Denver

IAD Washington, D.C. Dulles Intl - DEN Denver Intl

IADDEN

Washington, D.C. Dulles Intl

Fri 1/1

9:48 am-12:00 pm

Nonstop4h 12m

Denver Intl

Wed 12/31

12:00 am-2:00 am

Nonstop0h 00m

$284

Washington, D.C.Denver

IAD Washington, D.C. Dulles Intl - DEN Denver Intl

IADDEN

Washington, D.C. Dulles Intl

Mon 11/30

10:10 pm-12:19 am

Nonstop4h 09m

Denver Intl

Wed 12/31

12:00 am-2:00 am

Nonstop0h 00m

$317

Washington, D.C.Denver

IAD Washington, D.C. Dulles Intl - DEN Denver Intl

IADDEN

Washington, D.C. Dulles Intl

Wed 1/13

9:49 am-12:00 pm

Nonstop4h 11m

Denver Intl

Wed 12/31

12:00 am-2:00 am

Nonstop0h 00m

$324

Washington, D.C.Denver

IAD Washington, D.C. Dulles Intl - DEN Denver Intl

IADDEN

Washington, D.C. Dulles Intl

Sat 12/26

7:30 pm-9:33 pm

Nonstop4h 03m

Denver Intl

Wed 12/31

12:00 am-2:00 am

Nonstop0h 00m

$324

Washington, D.C.Denver

IAD Washington, D.C. Dulles Intl - DEN Denver Intl

IADDEN

Washington, D.C. Dulles Intl

Wed 12/16

12:35 pm-2:44 pm

Nonstop4h 09m

Denver Intl

Wed 12/31

12:00 am-2:00 am

Nonstop0h 00m

$324

Flights are sorted by cheapest round-trip flights first.

Deals found on 11/5

Showing 1-10 of 22 resultsSorted by cheapest first
1
2
3

Compare providers for flights from Dulles Intl to Denver

Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from Dulles Intl to Denver in November.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy1 starTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*3 stars
eDreamsPrice Accuracy2 starsTrust Score*3 stars
JustAirTicketPrice Accuracy-Trust Score*1 star
MytripPrice Accuracy3 starsTrust Score*3 stars
CheapTicketsDealPrice Accuracy1 starTrust Score*3 stars

*The Trust Score is based on feedback from users after their booking experience. It measures overall satisfaction, helping us identify issues like hidden fees, problems during the ticketing process, and the quality of customer service. This score is our best indicator of the provider's quality and reliability.

  • Most accurate provider: When it comes to deals on Washington, D.C. Dulles Intl Airport-Denver flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on Washington, D.C. Dulles Intl Airport-Denver flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from Washington, D.C. Dulles Intl Airport-Denver flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on Washington, D.C. Dulles Intl Airport-Denver flights, Cheapflights users trust FlightHub the most. FlightHub has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for Washington, D.C. Dulles Intl Airport-Denver flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.

Best time to book a flight from Dulles Intl to Denver

Have a flexible travel schedule? Discover the best time to fly to Denver from Dulles Intl with our price prediction graph.
Estimated round-trip price

Cheapflights Insights

Everything you need to know about your flight from Washington, D.C. Dulles Intl Airport to Denver

How far ahead should I book a flight from Washington, D.C. Dulles Intl Airport to Denver?

To ensure you get the cheapest price possible for a flight from Washington, D.C. Dulles Intl Airport to Denver, you should look to book at least 68 days in advance of your intended travel date. The price of your flight may increase if you delay and leave booking until a week or so before departure.

What is the cheapest month to book a flight from Washington, D.C. Dulles Intl Airport to Denver?

Currently, January is the cheapest month in which you can book a flight from Washington, D.C. Dulles Intl Airport to Denver (average of $317). Flying from Washington, D.C. Dulles Intl Airport to Denver in July is currently the most expensive (average of $540). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

What is the cheapest time of day to fly from IAD to DEN?

It’s optimal to fly from Washington, D.C. Dulles Intl Airport to Denver in the evening. By choosing this option you can save up to 16% on the cost of your flight, compared to a flight in the morning.

What is the cheapest day to fly from Washington, D.C. Dulles Intl Airport to Denver?

Travelers seeking maximum savings on their Washington, D.C. Dulles Intl Airport to Denver flight should consider departing on Wednesday evenings when fares are most often at their lowest. Sunday afternoons flights should be avoided if possible as fares are typically the most expensive at this time.

How much does it cost to fly round-trip from Washington, D.C. Dulles Intl Airport to Denver?

Airfare is below average for this route at the moment.

Washington, D.C. Dulles Intl Airport to Denver flights typically cost between $427 and $664 in December.
The cheapest round-trip price found within the last 5 days was $299 on Frontier (Dec 10-Dec 13).

The best insider tips for Washington, D.C. Dulles Intl Airport to Denver flights

Cheapflights partnered with top experts to bring you the best recommendations for your Washington, D.C. Dulles Intl Airport to Denver trip
Our travel experts
Emily Zemler

Emily Zemler

Expert on DEN

Emily is a freelance writer and book author based in London covering entertainment and travel. Her work has appeared in Los Angeles Times, Observer, and Conde Nast Traveler She has ventured to more than 40 countries and all seven continents, always in search of a great art museum. She has written extensively about hotels, luxury travel, and aviation.

Read more
Ramsey Qubein

Ramsey Qubein

Expert on IAD

An avid traveler and aviation expert who has visited 173 countries, all 50 states and seven continents, Ramsey Qubein flies nearly 400,000 miles a year. As a North Carolina-based freelance journalist for publications including Conde Nast Traveler, Forbes, USA Today and Bloomberg among others, he explores the latest trends in aviation, hospitality, cruises and business.

Read more

Reviews of airlines servicing Denver

Read through reviews of airlines operating flights from Washington, D.C. Dulles Intl Airport to Denver, such as Southwest,Delta, andUnited Airlines. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
Southwest
8.0
Very good
4,216 reviews

Boarding

8.1

Food

7.0

Crew

8.6

Comfort

8.0

Entertainment

7.5

Overall

8.0

Reviews

1 / 20
2.0
Mediocre

Thomas,Dec 2025

SEA - DEN

Plane two hours late in leaving 1:00 pm west coat time got home next day at 2:45am most car rental places are closed and don’t open till 5am
Southwest
8.0
Very good
4,216 reviews
Southwest
8.0
Very good
4,216 reviews

Boarding

8.1

Food

7.0

Crew

8.6

Comfort

8.0

Entertainment

7.5

Overall

8.0

Reviews

1 / 20
2.0
Mediocre

Thomas,Dec 2025

SEA - DEN

Plane two hours late in leaving 1:00 pm west coat time got home next day at 2:45am most car rental places are closed and don’t open till 5am
Delta
7.8
Good
8,699 reviews
Southwest
8.0
Very good
4,216 reviews

Boarding

8.1

Food

7.0

Crew

8.6

Comfort

8.0

Entertainment

7.5

Overall

8.0

Reviews

1 / 20
2.0
Mediocre

Thomas,Dec 2025

SEA - DEN

Plane two hours late in leaving 1:00 pm west coat time got home next day at 2:45am most car rental places are closed and don’t open till 5am
United Airlines
7.3
Good
10,471 reviews
Southwest
8.0
Very good
4,216 reviews

Boarding

8.1

Food

7.0

Crew

8.6

Comfort

8.0

Entertainment

7.5

Overall

8.0

Reviews

1 / 20
2.0
Mediocre

Thomas,Dec 2025

SEA - DEN

Plane two hours late in leaving 1:00 pm west coat time got home next day at 2:45am most car rental places are closed and don’t open till 5am
JetBlue
7.1
Good
3,064 reviews
Southwest
8.0
Very good
4,216 reviews

Boarding

8.1

Food

7.0

Crew

8.6

Comfort

8.0

Entertainment

7.5

Overall

8.0

Reviews

1 / 20
2.0
Mediocre

Thomas,Dec 2025

SEA - DEN

Plane two hours late in leaving 1:00 pm west coat time got home next day at 2:45am most car rental places are closed and don’t open till 5am
Frontier
5.5
Fair
2,510 reviews
Southwest
8.0
Very good
4,216 reviews

Boarding

8.1

Food

7.0

Crew

8.6

Comfort

8.0

Entertainment

7.5

Overall

8.0

Reviews

1 / 20
2.0
Mediocre

Thomas,Dec 2025

SEA - DEN

Plane two hours late in leaving 1:00 pm west coat time got home next day at 2:45am most car rental places are closed and don’t open till 5am

Related info for your journey

  • What airport do you fly into for flights to Denver from Washington, D.C. Dulles Intl?

    For a flight from Washington, D.C. Dulles Intl to Denver, you will be flying into Denver Intl. Denver Intl (DEN) is just 18.5 mi from the center of the city. Denver Intl is the only Denver airport and it handles 16 inbound flights from Washington, D.C. Dulles Intl per day. 6 airlines have flights to Denver Intl from Washington, D.C. Dulles Intl on a regular basis.

  • How long is the flight from Washington, D.C. Dulles Intl Airport to Denver?

    United Airlines can get you from Washington, D.C. Dulles Intl Airport to Denver in just under 4h 09m. Your travel time will be generally consistent. There are 1448 mi between Washington, D.C. Dulles Intl Airport and Denver. All flights are typically nonstop.

  • What are the cheapest airlines flying from Washington, D.C. Dulles Intl Airport to Denver round-trip?

    Our cheapest airline available from Washington, D.C. Dulles Intl Airport to Denver is Frontier. Our recent data shows that you can find tickets from as low as $133 on this airline. Additional options worth looking into are JetBlue and Southwest, starting at $161 and $197 round-trip. Frontier is currently priced 70% below the average price you’ll pay for this route.

  • What are the cheapest airlines to fly from Washington, D.C. Dulles Intl Airport to Denver one-way?

    $80 is the cheapest one-way deal found within the past few days, from Frontier. You may also be able to find cheap deals on Southwest and United Airlines, with prices starting from $88 and $151, respectively.

  • What are the most reliable airlines from Washington, D.C. Dulles Intl Airport to Denver?

    Before booking your flight to Denver from Washington, D.C. Dulles Intl Airport, check out the most reliable airlines to get you to your destination on time: Ethiopian Air (95%), Copa Airlines (88%), United Airlines( 88%).

  • What are the cheapest flights from Washington, D.C. Dulles Intl Airport to Denver?

    Looking for the cheapest flight from Washington, D.C. Dulles Intl Airport to Denver? While on average our users pay $1,027, our data indicates the cheapest price to be $186. The most popular route (Washington, D.C. Dulles Intl - Denver Intl), is priced around $292.

  • Can I find deals for flights from Dulles Intl to Denver that include hotel bookings?

    Yes. In addition to deals on Dulles Intl to Denver flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Dulles Intl to Denver?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Dulles Intl to Denver.

  • Can I find deals for business class flights from Dulles Intl to Denver?

    Yes. Cheapflights offers flight deals from Dulles Intl to Denver by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

  • What is the cheapest month to book a flight from Washington, D.C. Dulles Intl Airport to Denver?

    Currently, January is the cheapest month in which you can book a flight from Washington, D.C. Dulles Intl Airport to Denver (average of $317). Flying from Washington, D.C. Dulles Intl Airport to Denver in July is currently the most expensive (average of $540). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

Traveling to a place near Denver?

Book flights to Denver if you plan to visit one of these locations
Thornton
Westminster
Lakewood
Centennial
Broomfield
Englewood
Golden
Silverthorne
Fort Morgan
Limon
Greeley
Frisco
Winter Park
Wheat Ridge
Black Hawk
Central City
Manitou Springs
Glendale
Cripple Creek
Evergreen

Browse thousands of different options on Cheapflights for your next trip

Top 6 airlines flying from Dulles Intl to Denver

AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$133Average$294FlexibilityNo cancel feeOn-time62%
JetBlueCheapest$161Average$360FlexibilityNo cancel feeOn-time62%
SouthwestCheapest$197Average$371FlexibilityNo cancel feeOn-time63%
United AirlinesCheapest$257Average$489FlexibilityNo cancel feeOn-time69%
DeltaCheapest$296Average$529FlexibilityNo cancel feeOn-timeN/A
American AirlinesCheapest$332Average$478FlexibilityNo cancel feeOn-time71%

100% Free

Cheapflights is completely free to use, so you can start saving the moment you arrive.

Book with Flexibility

Our users can plan ahead with confidence and find flights with no change fees

Travel Smart

Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.
Site
©2026 Cheapflights