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Washington, D.C.

$62+ Cheap flights from Denver (DEN) to Washington, D.C. (WAS)

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 1/18. Fares are subject to change and may not be available on all flights or dates of travel.
DEN — WAS
Jan 27 — Feb 31
Tue 1/27
Tue 2/3
1 adult, Economy
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Find cheap flights from Denver to Washington, D.C. 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

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3. Compare prices and book

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Cheapflights Tip: The best prices from Denver Intl to Washington, D.C. are usually found in January or February, booked 52 days in advance, depart on a Friday or Thursday and return on a Wednesday

Cheap flight deals from Denver to Washington, D.C.

Cheapest flights from Denver to Washington, D.C.
Explore the most affordable flight options available from Denver to Washington, D.C.. Find the lowest fares from popular airlines and budget airlines, with prices last updated on December 28, 2025.

This Kiwi.com deal was found by Cheapflights users on 12/26. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/3011:06 amDEN - IAD
1 stop24h 39mMultiple Airlines
Sat 1/34:57 pmIAD - DEN
1 stop16h 46mMultiple Airlines
Deal found 12/26$309
This Priceline deal was found by Cheapflights users on 12/27. 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 Priceline is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/3010:40 pmDEN - DCA
1 stop9h 55mMultiple Airlines
Mon 1/128:01 amDCA - DEN
Nonstop4h 13mMultiple Airlines
Deal found 12/27$309
This Kiwi.com deal was found by Cheapflights users on 12/25. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/318:45 pmDEN - IAD
2 stops19h 31mMultiple Airlines
Sat 1/34:57 pmIAD - DEN
1 stop16h 46mMultiple Airlines
Deal found 12/25$318
This Cheapflightsfares deal was found by Cheapflights users on 12/27. 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.
Tue 12/304:38 pmDEN - DCA
Nonstop3h 21mFrontier
Mon 1/128:01 amDCA - DEN
Nonstop4h 13mFrontier
Deal found 12/27$323
This Expedia deal was found by Cheapflights users on 12/25. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/306:05 amDEN - BWI
1 stop8h 36mFrontier
Thu 1/112:39 pmBWI - DEN
1 stop21h 48mFrontier
Deal found 12/25$369
This Expedia deal was found by Cheapflights users on 12/26. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 12/286:00 amDEN - IAD
1 stop7h 53mFrontier
Mon 1/510:43 amIAD - DEN
1 stop24h 57mFrontier
Deal found 12/26$373
This Frontier deal was found by Cheapflights users on 12/26. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/2512:16 amDEN - BWI
1 stop8h 30mFrontier
Mon 1/57:00 amBWI - DEN
1 stop8h 33mFrontier
Deal found 12/26$373
This Kiwi.com deal was found by Cheapflights users on 12/27. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/3011:06 amDEN - IAD
1 stop24h 39mMultiple Airlines
Mon 1/59:58 pmIAD - DEN
1 stop14h 24mMultiple Airlines
Deal found 12/27$377
This Priceline deal was found by Cheapflights users on 12/27. 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 Priceline is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/3010:40 pmDEN - DCA
1 stop9h 55mJetBlue
Mon 1/126:00 amDCA - DEN
1 stop6h 42mJetBlue
Deal found 12/27$383
This Priceline deal was found by Cheapflights users on 12/27. 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 Priceline is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/3010:40 pmDEN - DCA
1 stop9h 55mMultiple Airlines
Wed 1/78:59 amDCA - DEN
Nonstop4h 13mMultiple Airlines
Deal found 12/27$384
This Kiwi.com deal was found by Cheapflights users on 12/27. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/304:38 pmDEN - DCA
Nonstop3h 21mFrontier
Fri 1/96:00 pmDCA - DEN
Nonstop4h 12mFrontier
Deal found 12/27$386
This Frontier deal was found by Cheapflights users on 12/26. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/2911:06 pmDEN - BWI
1 stop7h 22mFrontier
Sun 1/49:03 pmBWI - DEN
1 stop13h 35mFrontier
Deal found 12/26$387

Find flight deals from Denver to Washington, D.C.

Discover tips and strategies to find the most affordable flight options for your journey from Denver (DEN) to Washington, D.C. (WAS). 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 December 28, 2025.

Most accurate provider

CheapOair
3 stars

Most trusted provider

CheapOair
3 stars

Round-trip from

$116
(Super.com)

One-way from

$62
(Trip.com)

Popular in

December

Cheapest in

January

Average price

$344

Good round-trip deal

$176 or less

Good one-way deal

$144 or less
Provider with most accurate pricing for Denver Intl-Washington, D.C. (WAS) flight deals.
Search Deals
Provider most trusted by Cheapflights users for Denver Intl-Washington, D.C. (WAS) flights.
Search Deals
From Denver Intl to Washington, D.C. (WAS)
Search Deals
One-way flight from Denver Intl to Washington, D.C. (WAS)
Search Deals
Highest demand for flights based on searches. 10% potential increase in price ($32 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease ($8 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in December 2025
Search Deals
Price to beat on a round-trip flight from Denver Intl to Washington, D.C. (WAS).
Search Deals
Price to beat on a one-way flight from Denver Intl to Washington, D.C. (WAS).
Search Deals

Cheapflights Fare Finder

 
Customize your flight search to find flights from Denver to Washington, D.C. 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 December 28, 2025.
Use the filters below to find and compare flights from Denver to Washington, D.C. that are best for you.

Fly from

Denver

Fly to

Washington, D.C.

Route

Depart

Return

Price

DenverWashington, D.C.

DEN - IAD

DENIAD

Denver Intl

Sat 1/24

5:00 pm-10:10 pm

Nonstop3h 10m

Washington, D.C. Dulles Intl

Sat 1/31

3:45 pm-5:50 pm

Nonstop4h 05m

$197

DenverWashington, D.C.

DEN - IAD

DENIAD

Denver Intl

Thu 1/29

4:45 pm-9:55 pm

Nonstop3h 10m

Washington, D.C. Dulles Intl

Tue 2/3

5:30 pm-7:35 pm

Nonstop4h 05m

$197

DenverWashington, D.C.

DEN - IAD

DENIAD

Denver Intl

Sun 2/8

5:59 pm-11:22 pm

Nonstop3h 23m

Washington, D.C. Dulles Intl

Wed 2/11

10:32 pm-12:30 am

Nonstop3h 58m

$217

DenverWashington, D.C.

DEN - IAD

DENIAD

Denver Intl

Fri 2/20

7:45 am-1:05 pm

Nonstop3h 20m

Washington, D.C. Dulles Intl

Sun 2/22

5:10 pm-7:31 pm

Nonstop4h 21m

$217

DenverWashington, D.C.

DEN - IAD

DENIAD

Denver Intl

Thu 1/29

4:45 pm-9:55 pm

Nonstop3h 10m

Washington, D.C. Dulles Intl

Sun 2/1

5:30 am-7:30 am

Nonstop4h 00m

$217

DenverWashington, D.C.

DEN - IAD

DENIAD

Denver Intl

Fri 2/27

7:45 am-1:05 pm

Nonstop3h 20m

Washington, D.C. Dulles Intl

Mon 3/2

10:25 pm-12:30 am

Nonstop4h 05m

$217

DenverWashington, D.C.

DEN - DCA

DENDCA

Denver Intl

Sat 1/31

11:35 am-10:59 pm

1 stop9h 24m

Washington, D.C. Reagan-National

Tue 2/3

7:00 am-12:45 pm

1 stop7h 45m

$219

DenverWashington, D.C.

DEN - DCA

DENDCA

Denver Intl

Thu 4/9

11:15 pm-8:09 am

1 stop6h 54m

Washington, D.C. Reagan-National

Tue 4/14

10:00 am-3:30 pm

1 stop7h 30m

$219

DenverWashington, D.C.

DEN - DCA

DENDCA

Denver Intl

Wed 4/8

11:15 pm-10:55 am

1 stop9h 40m

Washington, D.C. Reagan-National

Mon 4/13

2:00 pm-10:17 pm

1 stop10h 17m

$219

DenverWashington, D.C.

DEN - DCA

DENDCA

Denver Intl

Thu 3/12

10:44 pm-8:01 am

1 stop7h 17m

Washington, D.C. Reagan-National

Wed 3/18

3:55 pm-9:44 pm

1 stop7h 49m

$219

Flights are sorted by cheapest round-trip flights first.

Deals found on 12/26

Showing 1-10 of 59 results
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Compare providers for flights from Denver to Washington, D.C.

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 Denver to Washington, D.C. in December.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy2 starsTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*1 star
JustAirTicketPrice Accuracy-Trust Score*1 star
eDreamsPrice Accuracy3 starsTrust Score*3 stars
CheapflightsfaresPrice Accuracy3 starsTrust Score*2 stars
CheapOairPrice Accuracy3 starsTrust Score*3 stars
Justfly.comPrice 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 Denver-Washington, D.C. flights, users find the pricing of CheapOair to be most consistent on Cheapflights vs. CheapOair Users can find the same prices on Denver-Washington, D.C. flight deals on Cheapflights vs. CheapOair >95% of the time. Price accuracy is based on data collected from Denver-Washington, D.C. flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on Denver-Washington, D.C. flights, Cheapflights users trust CheapOair the most. CheapOair 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 Denver-Washington, D.C. 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 Denver to Washington, D.C.

Have a flexible travel schedule? Discover the best time to fly to Washington, D.C. from Denver 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 Denver to Washington, D.C.

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

Use this chart to determine the optimal time to book a round-trip flight from Denver to Washington, D.C.. Price data was last updated on December 26, 2025.

To ensure you get the cheapest price possible for a flight from Denver to Washington, D.C., you should look to book at least 52 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 Denver to Washington, D.C.?

Currently, January is the cheapest month in which you can book a flight from Denver to Washington, D.C. (average of $73). Flying from Denver to Washington, D.C. in May is currently the most expensive (average of $134). 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 DEN to WAS?

Find hourly flight availability from Denver to Washington, D.C.. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated December 28, 2025.

When flying from Denver to Washington, D.C., the time of day you fly usually plays a role in the price. Save by searching for a flight in the morning, which can drop the price by up to 19% versus a flight at noon.

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

Use this chart to determine the cheapest time to fly round-trip from Denver to Washington, D.C.. Price data was last updated on December 27, 2025.

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

Weekly flight availability from Denver to Washington, D.C.

Explore weekly flight availability from Denver to Washington, D.C.. 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 December 28, 2025.

The most flights from DEN to WAS are scheduled on a Friday (33 on average). You will have fewer flight options on Thursday, which is when the least amount of flights are scheduled (25 on average).

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

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

AI-powered summary based on content written by travel experts. AI can make mistakes.
Cheapflights partnered with top experts to bring you the best recommendations for your Denver to Washington, D.C. trip
Airlines
Ethiopian Air

Ethiopian Airlines offers 32-inch pitch in Economy Class, providing better-than-average comfort.


Enjoy Ethiopian national dishes like doro wot on flights, offering a cultural culinary experience.

Read more about Ethiopian AirBy Paul Rubio
Frontier

Frontier offers extra comfort seats with 32” separation for a fee, enhancing travel comfort.


Early morning flights have a better chance of taking off and arriving on time.

Read more about FrontierBy Marisa Garcia
Southwest

Enjoy free snacks and non-alcoholic drinks, plus a free drink on special occasions.


Benefit from Early Bird check-in for priority boarding, available with Southwest Anytime fares.

Read more about SouthwestBy Marisa Garcia
Airports
DEN

For a smooth departure, reserve a security time online at DEN. It's available for general screening, bypassing long lines.

Read more about DENBy Emily Zemler
DCA

DCA is easily accessible via the D.C. Metro, with a dedicated stop on the Yellow and Blue lines, offering a clean and affordable option.

Read more about DCABy Emily Zemler
IAD

Use the Silver Line Metro to reach IAD in under 40 minutes, a cost-effective way to travel from D.C.

Read more about IADBy Ramsey Qubein
Our travel experts
Paul Rubio

Paul Rubio

Expert on Ethiopian Air

Paul Rubio

Paul Rubio

Travel journalist and photographer Paul Rubio is a Miami native (and current resident), who has lived in nine countries and traveled to 137. He is an expert in luxury travel, eco-travel, loyalty programs, hotels, airports and airlines. He is a contributing editor at AFAR, Condé Nast Traveler, LUXURY Magazine, and Palm Beach Illustrated.

Read more
Marisa Garcia

Marisa Garcia

Expert on Frontier and Southwest

Marisa Garcia

Marisa Garcia

Marisa knows planes inside and out, spending 16 years working on aircraft in hangars at airports around the world. She is an aviation industry expert, specialized in airline interiors and regulations. Ten years ago, she pivoted to journalism. She shares her insights in leading aviation, travel, and business publications and on her site FlightChic.

Read more
Emily Zemler

Emily Zemler

Expert on DCA and DEN

Emily Zemler

Emily Zemler

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

Ramsey Qubein

Ramsey Qubein

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 Washington, D.C.

Get insights into the airlines that provide service to Washington, D.C.. 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 Washington, D.C.. Reviews last updated December 28, 2025.
Read through reviews of airlines operating flights from Denver to Washington, D.C., such as Southwest, United Airlines, and Frontier. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
Southwest
8.0
Very good
4,250 reviews

Food

7.0

Overall

8.0

Entertainment

7.5

Crew

8.6

Comfort

8.0

Boarding

8.1

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
4,250 reviews
Southwest
8.0
Very good
4,250 reviews

Food

7.0

Overall

8.0

Entertainment

7.5

Crew

8.6

Comfort

8.0

Boarding

8.1

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
7.4
Good
9,114 reviews
Southwest
8.0
Very good
4,250 reviews

Food

7.0

Overall

8.0

Entertainment

7.5

Crew

8.6

Comfort

8.0

Boarding

8.1

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
5.7
Fair
3,063 reviews
Southwest
8.0
Very good
4,250 reviews

Food

7.0

Overall

8.0

Entertainment

7.5

Crew

8.6

Comfort

8.0

Boarding

8.1

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

Find useful and relevant information for your journey from Denver to Washington, D.C.. 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 from for flights from Denver to Washington, D.C.?

    Most people fly from Denver Intl (DEN) if they book a flight from Denver to Washington, D.C.. On average, Denver Intl has 29 outbound flights to Washington, D.C. per day from 5 airlines. Denver Intl is conveniently located just 18.5 mi from Denver’s city center.

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

    Southwest, United Airlines, and JetBlue can get you from Denver to Washington, D.C. in just under 3h 10m. Your travel time can differ by up to 6h 14m. The distance between Denver and Washington, D.C. is about 1448 mi. Both multi-stop and nonstop flights can be found to your destination and back.

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

    Our cheapest airline available from Denver to Washington, D.C. is Frontier. Our recent data shows that you can find tickets from as low as $97 on this airline. Additional options worth looking into are Delta and United Airlines, starting at $144 and $168 round-trip. Frontier is currently priced 62% below the average price you’ll pay for this route.

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

    $57 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 American Airlines, with prices starting from $88 and $98, respectively.

  • What are the most popular routes from Denver to Washington, D.C.?

    When deciding which route to take from Denver to Washington, D.C. consider Denver Intl - Baltimore/Washington, Denver Intl - Washington, D.C. Dulles Intl or Denver Intl - Washington, D.C. Reagan-National as they are the most popular.

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

    Before booking your flight to Washington, D.C. from Denver, check out the most reliable airlines to get you to your destination on time: ITA Airways (100%), Ethiopian Air (97%), United Airlines( 91%).

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

    Looking for the cheapest flight from Denver to Washington, D.C.? While on average our users pay $1,094, our data indicates the cheapest price to be $136. The most popular route (Denver Intl - Baltimore/Washington), is priced around $141.

  • Can I find deals for flights from Denver to Washington, D.C. that include hotel bookings?

    Yes. In addition to deals on Denver to Washington, D.C. flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Denver to Washington, D.C.?

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

  • Can I find deals for business class flights from Denver to Washington, D.C.?

    Yes. Cheapflights offers flight deals from Denver to Washington, D.C. 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 Denver to Washington, D.C.?

    Currently, January is the cheapest month in which you can book a flight from Denver to Washington, D.C. (average of $73). Flying from Denver to Washington, D.C. in May is currently the most expensive (average of $134). 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.?

Book flights to Washington, D.C. if you plan to visit one of these locations
Alexandria
Woodbridge
Tysons
Arlington
Owings Mills
Springfield
Hanover
Silver Spring
Fredericksburg
Linthicum Heights
Rockville
Laurel
Towson
Manassas
National Harbor
Bowie
Largo
McLean
Clinton
Cordova

Browse thousands of different options on Cheapflights for your next trip

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Top 5 airlines flying from Denver to Washington, D.C.

Discover the top 5 airlines that operate flights from Denver to Washington, D.C.. 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 December 28, 2025.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$99Average$237FlexibilityNo cancel feeOn-time62%
DeltaCheapest$138Average$312FlexibilityNo cancel feeOn-timeN/A
SouthwestCheapest$177Average$338FlexibilityNo cancel feeOn-time63%
United AirlinesCheapest$180Average$378FlexibilityNo cancel feeOn-time69%
American AirlinesCheapest$196Average$292FlexibilityNo cancel feeOn-time71%

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