$89 Cheap Flights from Denver (DEN) to Washington (DCA)

View $89 flight on Sat, Sep 6, 2025Opens in a new window

Popular airlines from Denver Intl. Airport (DEN) to Ronald Reagan Washington National Airport (DCA)

  • Plan, book, fly with confidence

  • trending down icon

    Be in the know

    Get alerts if flight prices drop or rise*
  • bex rewards loyalty icon

    Book smarter

    Save up to 30% on select hotels after you book a flight*
  • one key icon

    Earn twice

    Earn your airline miles on top of our OneKeyCash
    Learn about One Key

Cheap Flights from Denver to Washington (DEN-DCA)

Prices were available within the past 7 days and start at $89 for one-way flights and $159 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

American Airlines
Wed, Aug 20 - Sun, Aug 31
DEN
Denver
DCA
Washington
$159 Roundtrip, found 4 days ago
$159
Roundtrip
found 4 days ago
Select American Airlines flight, departing Wed, Aug 20 from Denver to Washington, returning Sun, Aug 31, priced at $159 found 4 days ago
Frontier Airlines
Wed, Sep 3 - Fri, Sep 5
DEN
Denver
DCA
Washington
$164 Roundtrip, found 11 hours ago
$164
Roundtrip
found 11 hours ago
Select Frontier Airlines flight, departing Wed, Sep 3 from Denver to Washington, returning Fri, Sep 5, priced at $164 found 11 hours ago
Frontier Airlines
Fri, Sep 5 - Sat, Sep 6
DEN
Denver
DCA
Washington
$168 Roundtrip, found 1 hour ago
$168
Roundtrip
found 1 hour ago
Select Frontier Airlines flight, departing Fri, Sep 5 from Denver to Washington, returning Sat, Sep 6, priced at $168 found 1 hour ago
Frontier Airlines
Fri, Aug 22 - Sun, Aug 31
DEN
Denver
DCA
Washington
$171 Roundtrip, found 8 hours ago
$171
Roundtrip
found 8 hours ago
Select Frontier Airlines flight, departing Fri, Aug 22 from Denver to Washington, returning Sun, Aug 31, priced at $171 found 8 hours ago
Frontier Airlines
Tue, Aug 26 - Sat, Aug 30
DEN
Denver
DCA
Washington
$173 Roundtrip, found 3 hours ago
$173
Roundtrip
found 3 hours ago
Select Frontier Airlines flight, departing Tue, Aug 26 from Denver to Washington, returning Sat, Aug 30, priced at $173 found 3 hours ago
Frontier Airlines
Sun, Aug 17 - Mon, Aug 18
DEN
Denver
DCA
Washington
$175 Roundtrip, found 1 hour ago
$175
Roundtrip
found 1 hour ago
Select Frontier Airlines flight, departing Sun, Aug 17 from Denver to Washington, returning Mon, Aug 18, priced at $175 found 1 hour ago
Frontier Airlines
Fri, Aug 22 - Sat, Aug 23
DEN
Denver
DCA
Washington
$176 Roundtrip, found 1 hour ago
$176
Roundtrip
found 1 hour ago
Select Frontier Airlines flight, departing Fri, Aug 22 from Denver to Washington, returning Sat, Aug 23, priced at $176 found 1 hour ago
United
Wed, Sep 3 - Thu, Sep 4
DEN
Denver
DCA
Washington
$177 Roundtrip, found 1 hour ago
$177
Roundtrip
found 1 hour ago
Select United flight, departing Wed, Sep 3 from Denver to Washington, returning Thu, Sep 4, priced at $177 found 1 hour ago
Southwest Airlines
Wed, Sep 3 - Thu, Sep 4
DEN
Denver
DCA
Washington
$188 Roundtrip, found 1 hour ago
$188
Roundtrip
found 1 hour ago
Select Southwest Airlines flight, departing Wed, Sep 3 from Denver to Washington, returning Thu, Sep 4, priced at $188 found 1 hour ago
Delta
Mon, Oct 6 - Tue, Oct 7
DEN
Denver
DCA
Washington
$231 Roundtrip, found 1 hour ago
$231
Roundtrip
found 1 hour ago
Select Delta flight, departing Mon, Oct 6 from Denver to Washington, returning Tue, Oct 7, priced at $231 found 1 hour ago

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

September is typically the cheapest month to fly

From $68 - $193 per traveler.

Graph displaying average flight prices per month

Flights from Denver (DEN) to Washington (DCA)
Origin airport
Denver Intl.
Destination airport
Ronald Reagan Washington National
Airlines serving
Alaska Airlines, American Airlines, Delta, Frontier Airlines, JetBlue Airways, Southwest Airlines, United
Roundtrip price
$158
Distance
1471 mi
Average flight time
6 hours 18 mins

Denver to Washington Flights

The cheapest times to fly from Denver to Washington

On average, Thursday can be the cheapest time to fly, according to data from the Airlines Reporting Corporation (ARC), one of the world's biggest databases for global airline sales. The data reveals that you could save up to 16% by flying on a Thursday—the cheapest day to travel on average—instead of a Sunday—the most expensive. Some of the most affordable flights from Denver to Washington are during the month of August. You can find some of the cheapest flights from Denver to Washington with Expedia's search tool and vast selection of airlines.

 

The best time to book a flight from Denver to Washington

Sunday is one of the best days to book for cheap flights from Denver to Washington: Tickets reserved on a Sunday cost between 6% and 13% less than those reserved on a Friday, according to ARC data. The data also suggests booking early can also lead to cheaper airfares. You could save 24% by buying your tickets for domestic flights at least a month in advance and 10% by booking international flights 2 months in advance.

 

How to find cheap round-trip tickets from Denver to Washington

Being flexible with your dates and using Expedia's Price Drop Protection and Price Tracking features are some of the best ways of finding a cheap ticket from Denver to Washington in 2025. You can also book with separate airlines for your outbound and return journeys, from $89 one-way. Expedia also offers Price Drop Protection, so if the cost of your airfare goes down after booking, you'll receive a credit for the difference*. This is available for a small fee, and is free to One Key Gold and Platinum tier members.

 

Expedia's Price Tracking feature means you can stay on top of airfares without manually checking every day. It sends you automated price alerts for cheap Denver to Washington flights and uses historical data to indicate when the best time to book is. Download Expedia's free app to activate this handy tool in a few easy taps.

 

You could also save big by booking one of Expedia's vacation packages. Bundling together your Denver to Washington airfare with your accommodations and car rental is often cheaper than booking everything separately. There’s also One Key, Expedia's generous rewards program. Join for free and you could earn One Key cash on most bookings to save on future adventures.

 

*Terms apply.

 

Disclaimer: ARC The statistics are based on average round-trip ticket prices between January and August 2023. The percentages you see are averages.

 

Frequently asked questions

How much does a flight from Denver Intl. Airport (DEN) to Ronald Reagan Washington National Airport (DCA) cost?
Cheap round-trip flights from Denver Intl. Airport (DEN) to Ronald Reagan Washington National Airport (DCA) start from $168. This information is based on the cheapest price found on Expedia for this return journey departing within the next three months. This airfare is for a Frontier Airlines flight leaving DEN on July 31 2025 and touching down at DCA. The price was last updated on July 9 2025 and has not changed since.
What is the cheapest month to fly from DEN to DCA?
The cheapest flights from DEN to DCA are usually during off-peak season, when demand is lower. To save money, avoid flying during public holidays, school breaks and major local events.
Which airlines fly direct from Denver Intl. Airport (DEN) to Ronald Reagan Washington National Airport (DCA)?
Catch a direct flight with Frontier Airlines and fly straight from Denver Intl. Airport (DEN) to Ronald Reagan Washington National Airport (DCA).
What is the cheapest airline that flies from DEN to DCA?
With prices starting from $89 for a one-way flight from DEN to DCA, United is currently the cheapest airline on this route. This fare is based on the lowest price found on Expedia departing within the next three months. The flight takes off from DEN on September 6 2025. Prices were last updated on July 9 2025 and have not changed since.
How many flights per day from Denver Intl. Airport (DEN) to Ronald Reagan Washington National Airport (DCA)?
With an average of 4 direct flights that operate from Denver Intl. Airport (DEN) to Ronald Reagan Washington National Airport (DCA) each day, you'll be cruising above the clouds before you know it.
What are the most popular departure times for flights from Denver Intl. Airport (DEN) to Ronald Reagan Washington National Airport (DCA)?
More travelers fly between DEN and DCA at 11 AM than at any other point in the day. Prefer a quieter experience? Try choosing a quieter departure window and it's possible you'll save on your fare as well.
What day of the week has the most flights from DEN to DCA?
If you travel on a Monday, you'll get the widest range of options for flights from Denver Intl. Airport (DEN) to Ronald Reagan Washington National Airport (DCA).
What is the earliest flight from Denver Intl. Airport (DEN) to Ronald Reagan Washington National Airport (DCA)?
Denver Intl. Airport (DEN)'s first flight to Ronald Reagan Washington National Airport (DCA) takes off at approximately 6:43AM UTC-7. With a travel duration of 3h 23m, you'll land at around 12:06PM UTC-5.
How long does it take to fly from Denver Intl. Airport (DEN) to Ronald Reagan Washington National Airport (DCA)?
Flights from DEN to DCA have an average travel time of 3 hours and 18 minutes. The total distance between the two airports is 1,450 mi.
What airline has the least delays from DEN to DCA?
United Airlines has the best track record for on-time direct flights from Denver Intl. Airport (DEN) to Ronald Reagan Washington National Airport (DCA), with an on-time score of 82%. Use the Expedia App to check your flight status before you take off and receive notifications about any trip changes.
What is the best time to fly from Denver Intl. Airport (DEN) to Ronald Reagan Washington National Airport (DCA)?
To avoid possible delays on the Denver Intl. Airport (DEN) to Ronald Reagan Washington National Airport (DCA) route, aim to travel before 3 PM. Departures after this time have a 22% higher chance of cancellation.**Most reliable time of the day and month to travel recommendation is based on January through August 2024 flight status data sourced from OAG's global flight data platform.
What airports do you fly into for Washington from Denver Intl. Airport (DEN)?
Denver Intl. Airport (DEN) offers direct flights to Washington. These are a few of the airports you can fly to without detours:

  • Ronald Reagan Washington National Airport (DCA)
  • Washington Dulles Intl. Airport (IAD)
  • Baltimore Washington Intl. Thurgood Marshall Airport (BWI)

Is it cheaper to buy a plane ticket from Denver Intl. Airport (DEN) to Ronald Reagan Washington National Airport (DCA) last-minute?
Last-minute bookings from DEN to DCA are generally more expensive. For the cheapest rates, start searching for flights as soon as possible. That being said, if you're flexible with your travel dates, you may land a cheap fare right before your journey.
Is it cheaper to book a DEN to DCA flight and hotel package?
Booking a DEN to DCA flight and hotel package is usually cheaper than booking separately. With Expedia, you can enjoy the ease of organizing your travels in one place. Choose from our wide range of hotels and then add car rentals, flights and activities to your booking. Bundle everything together, and you could save hundreds of dollars.
Can I cancel or change the date of my flight from Denver Intl. Airport (DEN) to Ronald Reagan Washington National Airport (DCA)?
In most cases, you can cancel or modify your DEN to DCA flight. However, additional charges may apply, especially if your booking was made over 24 hours ago. Check your itinerary for the airline's rules and fees on flight changes, or if you want further details, go to our Customer Service portal.

Explore a world of travel with Expedia

*Available to One Key members.