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$99+ Cheap flights from Dulles Intl (IAD) to Denver (DEN)

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 4/29. Fares are subject to change and may not be available on all flights or dates of travel.
IAD — DEN
Apr 1 — Apr 81
Tue 4/1
Tue 4/8
1 adult, Economy
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Cheapflights Tip: The best prices from Washington, D.C. Dulles Intl to Denver Intl are usually found in January or February, booked 51 days in advance, depart on a Tuesday or Wednesday and return on a Thursday

Cheap flight deals from Dulles Intl to Denver

Discover tips and strategies to find the most affordable flight options for your journey from Dulles Intl (IAD) to Denver (DEN). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated March 27, 2025.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$197
(Southwest)

One-way from

$99
(United Airlines)

Popular in

December

Cheapest in

January

Average price

$377

Good round-trip deal

$347 or less

Good one-way deal

$194 or less
Provider with most accurate pricing for Washington, D.C. Dulles Intl-Denver Intl flight deals.
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Provider most trusted by Cheapflights users for Washington, D.C. Dulles Intl-Denver Intl flights.
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From Washington, D.C. Dulles Intl to Denver Intl
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One-way flight from Washington, D.C. Dulles Intl to Denver Intl
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High demand for flights, 0% potential price rise
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Cheapest flight prices on average. 2% potential price decrease ($8 potential savings vs. average RT price).
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Average for round-trip flights in March 2025
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Price to beat on a round-trip flight from Washington, D.C. Dulles Intl to Denver Intl.
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Price to beat on a one-way flight from Washington, D.C. Dulles Intl to Denver Intl.
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Find flight deals from Dulles Intl to Denver

Cheapest flights from Dulles Intl to Denver
Explore the most affordable flight options available from Dulles Intl to Denver. Find the lowest fares from popular airlines and budget airlines, with prices last updated on March 27, 2025.

This United Airlines deal was found by Cheapflights users on 3/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 5/37:59 pmIAD - DEN
Nonstop3h 59mUnited Airlines
Wed 5/710:15 amDEN - IAD
Nonstop3h 21mUnited Airlines
Deal found 3/26$197
This Southwest deal was found by Cheapflights users on 3/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 4/265:05 amIAD - DEN
Nonstop3h 50mSouthwest
Sat 5/35:50 pmDEN - IAD
Nonstop3h 25mSouthwest
Deal found 3/26$227
This Sun Country Air deal was found by Cheapflights users on 3/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Sun Country Air is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/1012:40 pmIAD - DEN
1 stop5h 48mSun Country Air
Thu 10/1610:03 amDEN - IAD
1 stop24h 24mSun Country Air
Deal found 3/26$235
This Delta deal was found by Cheapflights users on 3/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 5/177:30 amIAD - DEN
1 stop9h 15mDelta
Mon 5/1912:55 amDEN - IAD
1 stop6h 05mDelta
Deal found 3/26$237
This American Airlines deal was found by Cheapflights users on 3/25. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 4/304:52 pmIAD - DEN
2 stops9h 01mAmerican Airlines
Sun 5/411:59 pmDEN - IAD
1 stop6h 39mAmerican Airlines
Deal found 3/25$242
This Mytrip deal was found by Cheapflights users on 3/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 5/35:34 pmIAD - DEN
1 stop7h 30mMultiple Airlines
Thu 10/95:58 pmDEN - IAD
1 stop15h 46mMultiple Airlines
Deal found 3/26$259
This Cheapflightsfares deal was found by Cheapflights users on 3/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 4/75:54 pmIAD - DEN
1 stop7h 35mFrontier
Wed 4/911:57 pmDEN - IAD
1 stop6h 39mFrontier
Deal found 3/26$275
This Alaska Airlines deal was found by Cheapflights users on 3/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 5/105:00 pmIAD - DEN
2 stops19h 51mAlaska Airlines
Sat 5/247:05 pmDEN - IAD
2 stops19h 09mAlaska Airlines
Deal found 3/26$419

Cheapflights Fare Finder

Customize your flight search to find flights from Dulles Intl to Denver that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated March 27, 2025.
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

Dulles Intl

Fly to

Denver

Route

Depart

Return

Price

Washington, D.C.Denver

IAD - DEN

IADDEN

Washington, D.C. Dulles Intl

Sat 5/3

7:59 pm-9:58 pm

Nonstop3h 59m

Denver Intl

Sat 5/17

11:59 pm-5:22 am

Nonstop3h 23m

$197

Washington, D.C.Denver

IAD - DEN

IADDEN

Washington, D.C. Dulles Intl

Sat 4/26

5:05 am-6:55 am

Nonstop3h 50m

Denver Intl

Sat 5/3

5:50 pm-11:15 pm

Nonstop3h 25m

$227

Washington, D.C.Denver

IAD - DEN

IADDEN

Washington, D.C. Dulles Intl

Sat 5/17

3:33 pm-9:48 pm

1 stop8h 15m

Denver Intl

Sat 5/24

12:06 pm-9:08 pm

1 stop7h 02m

$237

Washington, D.C.Denver

IAD - DEN

IADDEN

Washington, D.C. Dulles Intl

Mon 4/21

11:37 am-5:15 pm

1 stop7h 38m

Denver Intl

Thu 4/24

5:50 pm-12:23 pm

1 stop16h 33m

$240

Washington, D.C.Denver

IAD - DEN

IADDEN

Washington, D.C. Dulles Intl

Wed 4/30

4:52 pm-11:53 pm

2 stops9h 01m

Denver Intl

Sun 5/4

11:59 pm-8:38 am

1 stop6h 39m

$242

Washington, D.C.Denver

IAD - DEN

IADDEN

Washington, D.C. Dulles Intl

Sat 5/3

5:34 pm-11:04 pm

1 stop7h 30m

Denver Intl

Thu 10/9

5:58 pm-11:44 am

1 stop15h 46m

$259

Washington, D.C.Denver

IAD - DEN

IADDEN

Washington, D.C. Dulles Intl

Mon 4/7

5:54 pm-11:29 pm

1 stop7h 35m

Denver Intl

Wed 4/9

11:57 pm-8:36 am

1 stop6h 39m

$275

Washington, D.C.Denver

IAD - DEN

IADDEN

Washington, D.C. Dulles Intl

Sat 5/10

5:00 pm-10:51 am

2 stops19h 51m

Denver Intl

Sat 5/24

7:05 pm-4:14 pm

2 stops19h 09m

$419

Washington, D.C.Denver

IAD - DEN

IADDEN

Washington, D.C. Dulles Intl

Tue 4/29

6:40 pm-8:45 pm

Nonstop4h 05m

$99

Washington, D.C.Denver

IAD - DEN

IADDEN

Washington, D.C. Dulles Intl

Wed 5/28

10:19 pm-12:15 am

Nonstop3h 56m

$109

Flights are sorted by cheapest round-trip flights first.

Deals found on 3/26

Showing 1-10 of 18 results
1
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Compare providers for flights from Dulles Intl to Denver

Provider information is updated monthly. Please note that these providers often have deals for this flight, but the availability may vary on a day-by-day basis on Cheapflights.
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 March.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy1 starTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*3 stars
eDreamsPrice Accuracy3 starsTrust Score*3 stars
CheapTicketsDealPrice Accuracy3 starsTrust Score*3 stars
PricelinePrice 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
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

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?

Use this chart to determine the optimal time to book a round-trip flight from Dulles Intl to Denver. Price data was last updated on March 21, 2025.

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 51 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, October is the cheapest month in which you can book a flight from Washington, D.C. Dulles Intl Airport to Denver (average of $197). Flying from Washington, D.C. Dulles Intl Airport to Denver in March is currently the most expensive (average of $278). 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?

Find hourly flight availability from Dulles Intl to Denver. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated March 27, 2025.

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 32% 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?

Use this chart to determine the cheapest time to fly round-trip from Dulles Intl to Denver. Price data was last updated on March 23, 2025.

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

Weekly flight availability from Washington, D.C. Dulles Intl Airport to Denver

Explore weekly flight availability from Dulles Intl to Denver. Discover flights operating on different days of the week, giving you the flexibility to choose a travel day that best fits your plans. Compare info to find the most convenient option for your journey. Data last updated March 27, 2025.

The most flights from IAD to DEN are scheduled on a Wednesday (24 on average). You will have fewer flight options on Sunday, which is when the least amount of flights are scheduled (1 on average).

Rainfall in Denver by month

Plan your trip to Denver by taking into account the average rainfall totals by month.

In terms of precipitation, rainfall in Denver ranges from 0.5 - 2.3 inches per month. May is typically the wettest month, when rainfall can reach 2.3 in. January is typically the driest time to visit Denver when rainfall is around 0.5 in.

Temperature in Denver by month

Plan your trip to Denver by taking into account the average temperature totals by month.

If weather is an important factor for your trip to Denver, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 73.4 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 30.2 F).

Reviews of airlines servicing Denver

Get insights into the airlines that provide service to Denver. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Denver. Reviews last updated March 27, 2025.
Peruse reviews from past customers who have flown with Southwest, Alaska Airlines and Delta from Washington, D.C. to Denver to help guide your decision. You can also see how each airline stacks up in terms of entertainment options, comfort, food, crew/service, and boarding process.
Southwest
8.1
Very good
4,273 reviews

Boarding

8.2

Comfort

8.1

Entertainment

7.6

Overall

8.1

Crew

8.6

Food

7.1

Reviews

1 / 20
8.0
Excellent

Ila,Mar 2025

HOU - DAL

Our original flight was delayed. We were able to change our flight and got home at close to the same time. Looking forward to when you have assigned seating.
Southwest
8.1
Very good
4,273 reviews
Southwest
8.1
Very good
4,273 reviews

Boarding

8.2

Comfort

8.1

Entertainment

7.6

Overall

8.1

Crew

8.6

Food

7.1

Reviews

1 / 20
8.0
Excellent

Ila,Mar 2025

HOU - DAL

Our original flight was delayed. We were able to change our flight and got home at close to the same time. Looking forward to when you have assigned seating.
Alaska Airlines
8.0
Very good
9,795 reviews
Southwest
8.1
Very good
4,273 reviews

Boarding

8.2

Comfort

8.1

Entertainment

7.6

Overall

8.1

Crew

8.6

Food

7.1

Reviews

1 / 20
8.0
Excellent

Ila,Mar 2025

HOU - DAL

Our original flight was delayed. We were able to change our flight and got home at close to the same time. Looking forward to when you have assigned seating.
Delta
8.0
Very good
7,895 reviews
Southwest
8.1
Very good
4,273 reviews

Boarding

8.2

Comfort

8.1

Entertainment

7.6

Overall

8.1

Crew

8.6

Food

7.1

Reviews

1 / 20
8.0
Excellent

Ila,Mar 2025

HOU - DAL

Our original flight was delayed. We were able to change our flight and got home at close to the same time. Looking forward to when you have assigned seating.
Hawaiian Airlines
7.9
Good
2,334 reviews
Southwest
8.1
Very good
4,273 reviews

Boarding

8.2

Comfort

8.1

Entertainment

7.6

Overall

8.1

Crew

8.6

Food

7.1

Reviews

1 / 20
8.0
Excellent

Ila,Mar 2025

HOU - DAL

Our original flight was delayed. We were able to change our flight and got home at close to the same time. Looking forward to when you have assigned seating.
United Airlines
7.4
Good
8,603 reviews
Southwest
8.1
Very good
4,273 reviews

Boarding

8.2

Comfort

8.1

Entertainment

7.6

Overall

8.1

Crew

8.6

Food

7.1

Reviews

1 / 20
8.0
Excellent

Ila,Mar 2025

HOU - DAL

Our original flight was delayed. We were able to change our flight and got home at close to the same time. Looking forward to when you have assigned seating.

Related info for your journey

Find useful and relevant information for your journey from Dulles Intl to Denver. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • 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 18 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.

  • 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 Southwest. Our recent data shows that you can find tickets from as low as $197 on this airline. Additional options worth looking into are United Airlines and Delta, starting at $207 and $237 round-trip. Southwest is currently priced 44% 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?

    $99 is the cheapest one-way deal found within the past few days, from United Airlines. You may also be able to find cheap deals on Southwest and Sun Country Air, with prices starting from $109 and $111, 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: Southwest (87%), Copa Airlines (87%), Ethiopian Air( 87%).

  • 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 $934, our data indicates the cheapest price to be $134. The most popular route (Washington, D.C. Dulles Intl - Denver Intl), is priced around $197.

  • 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, October is the cheapest month in which you can book a flight from Washington, D.C. Dulles Intl Airport to Denver (average of $197). Flying from Washington, D.C. Dulles Intl Airport to Denver in March is currently the most expensive (average of $278). 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 Washington, D.C. Dulles Intl Airport?

Book flights to Washington, D.C. Dulles Intl Airport if you plan to visit one of these locations
Westminster
Lakewood
Black Hawk
Winter Park
Broomfield
Cripple Creek
Silverthorne
Golden
Brighton
Greeley
Frisco
Wheat Ridge
Grand Lake
Idaho Springs
Central City
Copper Mountain
Longmont
Thornton
Limon
Dillon

Browse thousands of different options on Cheapflights for your next trip

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Alternative routes for Dulles Intl to Denver

See prices for flight routes from nearby airports that may be better suited for you.
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Top 6 airlines flying from Dulles Intl to Denver

Discover the top 6 airlines that operate flights from Dulles Intl to Denver. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated March 27, 2025.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$79Average$224FlexibilityNo cancel feeOn-time62%
Sun Country AirCheapest$110Average$285FlexibilityNo cancel feeOn-time83%
American AirlinesCheapest$166Average$378FlexibilityNo cancel feeOn-time71%
SouthwestCheapest$209Average$314FlexibilityNo cancel feeOn-time63%
United AirlinesCheapest$215Average$377FlexibilityNo cancel feeOn-time69%
DeltaCheapest$216Average$267FlexibilityNo cancel feeOn-timeN/A
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