HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
Reagan-National

$100+ Cheap flights from Denver (DEN) to Reagan-National (DCA)

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 8/12. Fares are subject to change and may not be available on all flights or dates of travel.
DEN — DCA
août 5 — août 121
mar. 8/5
mar. 8/12
1 adult, Economy
We work with more than 300 partners to bring you better travel deals

Find cheap flights from Denver to Reagan-National 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 Denver Intl to Washington, D.C. Reagan-National are usually found in February or September, booked 88 days in advance, depart on a Wednesday or Tuesday and return on a Wednesday

Cheap flight deals from Denver to Reagan-National

Discover tips and strategies to find the most affordable flight options for your journey from Denver (DEN) to Reagan-National (DCA). 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 juillet 31, 2025.

Round-trip from

$162
(Frontier)

One-way from

$100
(Frontier)

Popular in

December

Cheapest in

February

Average price

$248

Good round-trip deal

$192 or less

Good one-way deal

$134 or less
From Denver Intl to Washington, D.C. Reagan-National
Search Deals
One-way flight from Denver Intl to Washington, D.C. Reagan-National
Search Deals
Highest demand for flights based on searches. 9% potential increase in price ($24 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease ($6 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in July 2025
Search Deals
Price to beat on a round-trip flight from Denver Intl to Washington, D.C. Reagan-National.
Search Deals
Price to beat on a one-way flight from Denver Intl to Washington, D.C. Reagan-National.
Search Deals

Find flight deals from Denver to Reagan-National

Cheapest flights from Denver to Reagan-National
Explore the most affordable flight options available from Denver to Reagan-National. Find the lowest fares from popular airlines and budget airlines, with prices last updated on juillet 31, 2025.

This Frontier deal was found by Cheapflights users on 7/29. 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.
mar. 8/126:38 amDEN - DCA
Nonstop3h 26mFrontier
mer. 8/271:00 pmDCA - DEN
Nonstop3h 59mFrontier
Deal found 7/29$162
This American Airlines deal was found by Cheapflights users on 7/31. 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.
sam. 8/308:34 amDEN - DCA
1 stop8h 20mAmerican Airlines
sam. 9/63:28 pmDCA - DEN
1 stop5h 57mAmerican Airlines
Deal found 7/31$196
This United Airlines deal was found by Cheapflights users on 7/31. 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.
sam. 8/309:40 amDEN - DCA
Nonstop3h 26mUnited Airlines
lun. 9/294:23 pmDCA - DEN
Nonstop3h 56mUnited Airlines
Deal found 7/31$198

Cheapflights Fare Finder

 
Customize your flight search to find flights from Denver to Reagan-National 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 juillet 31, 2025.
Use the filters below to find and compare flights from Denver to Washington, D.C. Reagan-National Airport that are best for you.

Fly from

Denver

Fly to

Reagan-National

Route

Depart

Return

Price

DenverWashington, D.C.

DEN - DCA

DENDCA

Denver Intl

mar. 8/12

6:38 am-12:04 pm

Nonstop3h 26m

Washington, D.C. Reagan-National

mer. 8/27

1:00 pm-2:59 pm

Nonstop3h 59m

$162

DenverWashington, D.C.

DEN - DCA

DENDCA

Denver Intl

sam. 8/30

8:34 am-6:54 pm

1 stop8h 20m

Washington, D.C. Reagan-National

sam. 9/6

3:28 pm-7:25 pm

1 stop5h 57m

$196

DenverWashington, D.C.

DEN - DCA

DENDCA

Denver Intl

sam. 8/30

9:40 am-3:06 pm

Nonstop3h 26m

Washington, D.C. Reagan-National

lun. 9/29

4:23 pm-6:19 pm

Nonstop3h 56m

$198

DenverWashington, D.C.

DEN - DCA

DENDCA

Denver Intl

mar. 8/12

6:38 am-12:04 pm

Nonstop3h 26m

$100

DenverWashington, D.C.

DEN - DCA

DENDCA

Denver Intl

dim. 8/31

8:15 am-3:00 pm

1 stop4h 45m

$110

DenverWashington, D.C.

DEN - DCA

DENDCA

Denver Intl

ven. 8/22

12:59 am-9:11 am

1 stop6h 12m

$119

DenverWashington, D.C.

DEN - DCA

DENDCA

Denver Intl

mar. 1/27

11:59 pm-9:01 am

1 stop7h 02m

$129

DenverWashington, D.C.

DEN - DCA

DENDCA

Denver Intl

sam. 8/30

9:40 am-3:06 pm

Nonstop3h 26m

$140

DenverWashington, D.C.

DEN - DCA

DENDCA

Denver Intl

sam. 9/27

9:04 am-11:04 pm

2 stops12h 00m

$144

Flights are sorted by cheapest round-trip flights first.

Deals found on 7/29

The best insider tips for Denver to Washington, D.C. Reagan-National Airport flights

Snippets provided in this section are AI-generated based on a summarization of Cheapflights-commissioned articles. The articles are presented as-is, for general informational purposes only, and may not be up-to-date. The opinions contained in the articles are original to the author and reflect their authentic experience, which may vary significantly from the experience of others.
Cheapflights partnered with top experts to bring you the best recommendations for your Denver to Washington, D.C. Reagan-National Airport trip
Airports
DEN

For a quick check-in at DEN, use the DEN Reserve to book a security screening time online, 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 transit option.

Read more about DCAby Emily Zemler
Our travel experts
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

Best time to book a flight from Denver to Reagan-National

Have a flexible travel schedule? Discover the best time to fly to Reagan-National 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. Reagan-National Airport

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

Use this chart to determine the optimal time to book a round-trip flight from Denver to Reagan-National. Price data was last updated on July 25, 2025.

The best time to book flights from Denver to Washington, D.C. Reagan-National Airport is 88 days before your desired departure date. The cost of your flight will likely increase significantly if you book two weeks in advance of your flight.

What is the cheapest month to book a flight from Denver to Washington, D.C. Reagan-National Airport?

Currently, February is the cheapest month in which you can book a flight from Denver to Washington, D.C. Reagan-National Airport (average of $278). Flying from Denver to Washington, D.C. Reagan-National Airport in March is currently the most expensive (average of $335). 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 DCA?

Find hourly flight availability from Denver to Reagan-National. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated juillet 31, 2025.

Unlike at noon, when flights are generally more expensive, you can save up to 25% on flights from Denver to Washington, D.C. Reagan-National Airport by exploring options for tickets in the morning.

What is the cheapest day to fly from Denver to Washington, D.C. Reagan-National Airport?

Use this chart to determine the cheapest time to fly round-trip from Denver to Reagan-National. Price data was last updated on July 27, 2025.

Travelers seeking maximum savings on their Denver to Washington, D.C. Reagan-National Airport flight should consider departing on Thursday at noon when fares are most often at their lowest. Tuesday evenings 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. Reagan-National Airport

Explore weekly flight availability from Denver to Reagan-National. 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 juillet 31, 2025.

The most flights from DEN to DCA are scheduled on a Thursday (5 on average). You will have fewer flight options on Tuesday, which is when the least amount of flights are scheduled (1 on average).

Reviews of airlines servicing Reagan-National

Get insights into the airlines that provide service to Reagan-National. 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 Reagan-National. Reviews last updated juillet 31, 2025.
Read through reviews of airlines operating flights from Denver to Washington, D.C. Reagan-National Airport, such as Southwest, Delta, and United Airlines. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
Southwest
8.0
Very good
4,246 reviews

Food

7.0

Overall

8.0

Crew

8.6

Boarding

8.1

Entertainment

7.5

Comfort

8.0

Reviews

1 / 20
8.0
Excellent

Gina,Jul 2025

LAS - DEN

We experienced bad weather, which turned our 1.5 hour flight from Las Vegas to Denver, into 3.5. The pilot and crew kept us updated and explained that we had to circle and or possibly redirect to another airport. After circling for sometime, we were able to land smoothly in Denver. Thank you to all the flight crew, tower control, and all who got us to our destination safely.
Southwest
8.0
Very good
4,246 reviews
Southwest
8.0
Very good
4,246 reviews

Food

7.0

Overall

8.0

Crew

8.6

Boarding

8.1

Entertainment

7.5

Comfort

8.0

Reviews

1 / 20
8.0
Excellent

Gina,Jul 2025

LAS - DEN

We experienced bad weather, which turned our 1.5 hour flight from Las Vegas to Denver, into 3.5. The pilot and crew kept us updated and explained that we had to circle and or possibly redirect to another airport. After circling for sometime, we were able to land smoothly in Denver. Thank you to all the flight crew, tower control, and all who got us to our destination safely.
Delta
8.0
Very good
7,981 reviews
Southwest
8.0
Very good
4,246 reviews

Food

7.0

Overall

8.0

Crew

8.6

Boarding

8.1

Entertainment

7.5

Comfort

8.0

Reviews

1 / 20
8.0
Excellent

Gina,Jul 2025

LAS - DEN

We experienced bad weather, which turned our 1.5 hour flight from Las Vegas to Denver, into 3.5. The pilot and crew kept us updated and explained that we had to circle and or possibly redirect to another airport. After circling for sometime, we were able to land smoothly in Denver. Thank you to all the flight crew, tower control, and all who got us to our destination safely.
United Airlines
7.4
Good
8,900 reviews
Southwest
8.0
Very good
4,246 reviews

Food

7.0

Overall

8.0

Crew

8.6

Boarding

8.1

Entertainment

7.5

Comfort

8.0

Reviews

1 / 20
8.0
Excellent

Gina,Jul 2025

LAS - DEN

We experienced bad weather, which turned our 1.5 hour flight from Las Vegas to Denver, into 3.5. The pilot and crew kept us updated and explained that we had to circle and or possibly redirect to another airport. After circling for sometime, we were able to land smoothly in Denver. Thank you to all the flight crew, tower control, and all who got us to our destination safely.
JetBlue
7.3
Good
2,914 reviews
Southwest
8.0
Very good
4,246 reviews

Food

7.0

Overall

8.0

Crew

8.6

Boarding

8.1

Entertainment

7.5

Comfort

8.0

Reviews

1 / 20
8.0
Excellent

Gina,Jul 2025

LAS - DEN

We experienced bad weather, which turned our 1.5 hour flight from Las Vegas to Denver, into 3.5. The pilot and crew kept us updated and explained that we had to circle and or possibly redirect to another airport. After circling for sometime, we were able to land smoothly in Denver. Thank you to all the flight crew, tower control, and all who got us to our destination safely.
American Airlines
7.2
Good
10,000 reviews
Southwest
8.0
Very good
4,246 reviews

Food

7.0

Overall

8.0

Crew

8.6

Boarding

8.1

Entertainment

7.5

Comfort

8.0

Reviews

1 / 20
8.0
Excellent

Gina,Jul 2025

LAS - DEN

We experienced bad weather, which turned our 1.5 hour flight from Las Vegas to Denver, into 3.5. The pilot and crew kept us updated and explained that we had to circle and or possibly redirect to another airport. After circling for sometime, we were able to land smoothly in Denver. Thank you to all the flight crew, tower control, and all who got us to our destination safely.

Related info for your journey

Find useful and relevant information for your journey from Denver to Reagan-National. 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. Reagan-National?

    Denver Intl (DEN), located 18.5 mi from the city center, is the airport you fly out of when you book flights from Denver to Washington, D.C. Reagan-National. 5 airlines have flights from Denver Intl to Washington, D.C. Reagan-National on a regular basis. Booking flights from Denver Intl to Washington, D.C. Reagan-National should not be difficult; the airport handles an average of 3 outbound flights to Washington, D.C. Reagan-National per day.

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

    Frontier, at $162, was found to be the cheapest airline from Denver to Washington, D.C. Reagan-National Airport. An alternate airline flying to your destination would be American Airlines. These flights start at 35% lower than the current average price 3 months from now.

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

    The cheapest airlines for a one-way flight from Denver to Washington, D.C. Reagan-National Airport are Frontier ($100), Southwest ($110), and Delta ($119).

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

    Looking for the most reliable airlines to get you to your destination on time? Our data shows these are most likely to get you from Denver to Washington, D.C. Reagan-National Airport on time: Air Canada (92%), United Airlines (90%), Frontier (66%).

  • What are the cheapest flights from Denver to Washington, D.C. Reagan-National Airport?

    Looking at all options, your cheapest flight can be booked for $96. While the most popular route (Denver Intl - Washington, D.C. Reagan-National) can be booked for $116 on average our data indicates $209 when flying from Denver to Washington, D.C. Reagan-National Airport.

  • Can I find deals for flights from Denver to Reagan-National that include hotel bookings?

    Yes. In addition to deals on Denver to Reagan-National flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Denver to Reagan-National?

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

  • Can I find deals for business class flights from Denver to Reagan-National?

    Yes. Cheapflights offers flight deals from Denver to Reagan-National 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. Reagan-National Airport?

    Currently, February is the cheapest month in which you can book a flight from Denver to Washington, D.C. Reagan-National Airport (average of $278). Flying from Denver to Washington, D.C. Reagan-National Airport in March is currently the most expensive (average of $335). 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. Reagan-National Airport?

Book flights to Washington, D.C. Reagan-National Airport if you plan to visit one of these locations
Woodbridge
Arlington
Alexandria
Tysons
Silver Spring
Fredericksburg
Gaithersburg
Towson
Linthicum Heights
Easton
Fairfax
Manassas
Falls Church
Waldorf
Laurel
Rockville
Oxon Hill
National Harbor
Dundalk
Bowie

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Alternative routes for Denver to Reagan-National

See prices for flight routes from nearby airports that may be better suited for you.
Denver to Baltimore flights
Denver to Dulles Intl flights
Colorado Springs to Dulles Intl flights
Colorado Springs to Baltimore flights
Colorado Springs to Reagan-National flights
Durango to Baltimore flights
Vail to Dulles Intl flights
Aspen to Baltimore flights
Durango to Dulles Intl flights
Vail to Baltimore flights
Aspen to Dulles Intl flights
Durango to Reagan-National flights
Hayden to Dulles Intl flights
Grand Junction to Baltimore flights
Aspen to Reagan-National flights
Vail to Reagan-National flights
Grand Junction to Reagan-National flights
Hayden to Baltimore flights
Grand Junction to Dulles Intl flights
Montrose to Baltimore flights
Montrose to Dulles Intl flights
Montrose to Reagan-National flights
Hayden to Reagan-National flights
Gunnison to Baltimore flights
Gunnison to Dulles Intl flights

Top 5 airlines flying from Denver to Reagan-National

Discover the top 5 airlines that operate flights from Denver to Reagan-National. 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 juillet 31, 2025.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$99Average$239FlexibilityNo cancel feeOn-time62%
American AirlinesCheapest$166Average$288FlexibilityNo cancel feeOn-time71%
United AirlinesCheapest$196Average$390FlexibilityNo cancel feeOn-time69%
DeltaCheapest$216Average$334FlexibilityNo cancel feeOn-timeN/A
SouthwestCheapest$256Average$369FlexibilityNo cancel feeOn-time63%

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.