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Washington, D.C.

$136+ Cheap flights from Colorado 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 8/7. Fares are subject to change and may not be available on all flights or dates of travel.
DEN — WAS
Aug 26 — Sep 21
Wed 8/26
Wed 9/2
1 adult, Economy
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Cheap flight deals from Colorado to Washington, D.C.

Cheapest flights from Colorado to Washington, D.C.
Explore the most affordable flight options available from Colorado to Washington, D.C.. Find the lowest fares from popular airlines and budget airlines, with prices last updated on July 27, 2026.

This Kiwi.com deal was found by Cheapflights users on 7/27. 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.
Sat 8/156:30 am
DEN
-
IAD
1 stop8h 04m
Frontier
Sat 8/228:59 am
IAD
-
DEN
1 stop14h 42m
Frontier
Deal found 7/27$237
This Frontier deal was found by Cheapflights users on 7/27. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/286:38 pm
DEN
-
IAD
1 stop9h 42m
Frontier
Fri 10/211:12 am
IAD
-
DEN
1 stop10h 25m
Frontier
Deal found 7/27$240
This Frontier deal was found by Cheapflights users on 7/27. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/19:19 pm
DEN
-
IAD
1 stop12h 14m
Frontier
Sun 10/412:30 pm
IAD
-
DEN
1 stop11h 19m
Frontier
Deal found 7/27$241
This Kiwi.com deal was found by Cheapflights users on 7/27. 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.
Sat 8/2210:43 am
DEN
-
IAD
1 stop10h 09m
Frontier
Wed 8/268:39 pm
IAD
-
DEN
2 stops26h 46m
Frontier
Deal found 7/27$242
This Kiwi.com deal was found by Cheapflights users on 7/27. 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.
Fri 8/2110:09 am
DEN
-
IAD
1 stop6h 20m
Frontier
Mon 8/248:59 am
IAD
-
DEN
2 stops17h 45m
Frontier
Deal found 7/27$243
This Kiwi.com deal was found by Cheapflights users on 7/26. 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.
Fri 8/286:30 am
DEN
-
IAD
1 stop8h 44m
Frontier
Mon 8/318:39 pm
IAD
-
DEN
2 stops18h 41m
Frontier
Deal found 7/26$245
This CheapOair deal was found by Cheapflights users on 7/26. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/511:37 pm
DEN
-
DCA
1 stop8h 33m
Multiple Airlines
Mon 9/76:00 pm
DCA
-
DEN
Nonstop4h 07m
Multiple Airlines
Deal found 7/26$245
This Kiwi.com deal was found by Cheapflights users on 7/25. 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.
Thu 10/229:19 am
DEN
-
IAD
1 stop7h 50m
Frontier
Tue 10/277:00 am
IAD
-
DEN
2 stops16h 41m
Frontier
Deal found 7/25$246
This Kiwi.com deal was found by Cheapflights users on 7/26. 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.
Fri 9/187:25 am
DEN
-
DCA
Nonstop3h 24m
Frontier
Sun 9/207:00 am
DCA
-
DEN
Nonstop4h 03m
Frontier
Deal found 7/26$246
This Kiwi.com deal was found by Cheapflights users on 7/26. 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.
Sun 10/187:34 pm
DEN
-
IAD
1 stop14h 33m
Multiple Airlines
Thu 10/229:16 pm
IAD
-
DEN
1 stop14h 15m
Multiple Airlines
Deal found 7/26$247
This Booking.com deal was found by Cheapflights users on 7/25. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/296:00 am
DEN
-
IAD
1 stop8h 07m
Frontier
Fri 9/412:28 pm
IAD
-
DEN
1 stop12h 39m
Frontier
Deal found 7/25$248
This FlightHub deal was found by Cheapflights users on 7/26. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/411:59 pm
DEN
-
IAD
1 stop9h 44m
Frontier
Mon 9/79:44 pm
IAD
-
DEN
1 stop12h 23m
Frontier
Deal found 7/26$249

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

Keep the following information in mind while searching for Colorado to Washington, D.C. flight deals. Data was last updated July 27, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$237
(Kiwi.com)

One-way from

$136
(Frontier)

Popular in

June

Cheapest in

January

Average price

$422

Good round-trip deal

$294 or less

Good one-way deal

$212 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 Colorado to Washington, D.C. (WAS)
Search Deals
One-way flight from Colorado to Washington, D.C. (WAS)
Search Deals
Highest demand for flights based on searches. 24% potential increase in price ($99 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease ($12 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in July 2026
Search Deals
Price to beat on a round-trip flight from Colorado to Washington, D.C. (WAS).
Search Deals
Price to beat on a one-way flight from Colorado to Washington, D.C. (WAS).
Search Deals

Cheapflights Fare Finder

 
Customize your flight search to find flights from Colorado 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 July 27, 2026.
Use the filters below to find and compare flights from Colorado to Washington, D.C. that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

DenverWashington, D.C.

DEN - IAD

DENIAD

Denver Intl

Sat 9/26

11:52 pm-5:17 am

Nonstop3h 25m

Washington, D.C. Dulles Intl

Sun 9/27

6:35 am-8:28 am

Nonstop3h 53m

$314
Quickest round-trip

DenverBaltimore

DEN - BWI

DENBWI

Denver Intl

Thu 10/22

6:45 pm-12:05 am

Nonstop3h 20m

Baltimore/Washington

Tue 10/27

3:55 pm-5:50 pm

Nonstop3h 55m

$319

DenverWashington, D.C.

DEN - IAD

DENIAD

Denver Intl

Fri 10/9

5:56 pm-11:25 pm

Nonstop3h 29m

Washington, D.C. Dulles Intl

Tue 10/13

5:27 pm-7:30 pm

Nonstop4h 03m

$319

DenverBaltimore

DEN - BWI

DENBWI

Denver Intl

Thu 8/13

3:40 pm-9:00 pm

Nonstop3h 20m

Baltimore/Washington

Wed 8/19

2:55 pm-6:30 pm

1 stop5h 35m

$319

DenverWashington, D.C.

DEN - IAD

DENIAD

Denver Intl

Mon 10/19

5:56 pm-11:25 pm

Nonstop3h 29m

Washington, D.C. Dulles Intl

Sun 10/25

10:10 pm-12:19 am

Nonstop4h 09m

$319

DenverWashington, D.C.

DEN - IAD

DENIAD

Denver Intl

Wed 12/23

7:10 pm-12:36 am

Nonstop3h 26m

Washington, D.C. Dulles Intl

Tue 12/29

10:35 pm-12:38 am

Nonstop4h 03m

$319

DenverWashington, D.C.

DEN - IAD

DENIAD

Denver Intl

Fri 11/27

10:20 am-3:44 pm

Nonstop3h 24m

Washington, D.C. Dulles Intl

Mon 11/30

10:10 pm-12:19 am

Nonstop4h 09m

$319

DenverWashington, D.C.

DEN - IAD

DENIAD

Denver Intl

Thu 10/22

8:00 am-1:30 pm

Nonstop3h 30m

Washington, D.C. Dulles Intl

Tue 10/27

8:20 am-10:29 am

Nonstop4h 09m

$319

DenverBaltimore

DEN - BWI

DENBWI

Denver Intl

Wed 9/9

8:05 am-1:35 pm

Nonstop3h 30m

Baltimore/Washington

Wed 9/16

12:10 pm-3:10 pm

1 stop5h 00m

$325

DenverWashington, D.C.

DEN - DCA

DENDCA

Denver Intl

Tue 9/8

6:35 am-4:10 pm

1 stop7h 35m

Washington, D.C. Reagan-National

Tue 9/15

4:50 pm-7:50 pm

1 stop5h 00m

$328

Flights are sorted by cheapest round-trip flights first.

Deals found on 7/23

Showing 1-10 of 60 resultsSorted by cheapest first
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Best time to book a flight from Colorado to Washington, D.C.

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

What is the cheapest month to book a flight from Colorado to Washington, D.C.?

Currently, February is the cheapest month in which you can book a flight from Colorado to Washington, D.C. (average of $251). Flying from Colorado to Washington, D.C. in June is currently the most expensive (average of $483). 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 CO to WAS?

Find hourly flight availability from Colorado 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 July 27, 2026.

It’s typically best to fly out from Colorado to Washington, D.C. in the morning. Doing so could potentially save you 29% on the flight price compared to flying in the evening, which is usually more expensive.

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

Explore weekly flight availability from Colorado 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 July 27, 2026.

The most flights from USCO to WAS are scheduled on a Friday (36 on average). You will have fewer flight options on Tuesday, which is when the least amount of flights are scheduled (28 on average).

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

Airfare is typical for this route at the moment.
Colorado to Washington, D.C. flights typically cost between $207 and $357 in August.
The cheapest round-trip price found within the last 5 days was $237 on Frontier (Aug 15-Aug 22).

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

The price you pay for your flight from Colorado to Washington, D.C. may vary depending on when you book. For the best chance of a lower fare, look to book 81 days in advance of your trip. Fares are likely to increase a fortnight or so before your departure date.

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

Use this chart to determine the cheapest time to fly round-trip from Colorado to Washington, D.C.. Price data was last updated on July 25, 2026.

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

Related info for your journey

Find useful and relevant information for your journey from Colorado 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.

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

    For as low as $319, United Airlines can have you in Washington, D.C. from Colorado in 3h 20m. The distance between Colorado and Washington, D.C. is about 1486 mi. This flight may include one or multiple stops.

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

    For one-way options, check prices for Frontier. According to our data, you can fly for as low as $59. Users have also found prices from $88 and $98 on Southwest and American Airlines, respectively.

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

    Most travelers choose Denver Intl - Washington, D.C. Dulles Intl, Denver Intl - Baltimore/Washington or Denver Intl - Washington, D.C. Reagan-National when deciding on the best route from Colorado to Washington, D.C..

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

    Before booking your flight to Washington, D.C. from Colorado, check out the most reliable airlines to get you to your destination on time: ITA Airways (94%), Avianca (93%), Ethiopian Air( 90%).

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

    While on average a flight from Colorado to Washington, D.C. is generally $1,018, our data shows the cheapest flight currently is $192. When looking at the most popular route, (Denver Intl - Washington, D.C. Dulles Intl), you can expect to pay $217 for that flight.

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

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

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

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

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

    Currently, February is the cheapest month in which you can book a flight from Colorado to Washington, D.C. (average of $251). Flying from Colorado to Washington, D.C. in June is currently the most expensive (average of $483). 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
Owings Mills
Arlington
Tysons
Springfield
Lanham
Reston
Herndon
Rockville
Hyattsville
Fredericksburg
Falls Church
Hanover
Manassas
Laurel
Clinton
Hunt Valley
Cordova
Woodbridge
Largo

Browse thousands of different options on Cheapflights for your next trip

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Alternative routes for Colorado to Washington, D.C.

See prices for flight routes from nearby airports that may be better suited for you.
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Top 6 airlines flying from Colorado to Washington, D.C.

Discover the top 6 airlines that operate flights from Colorado 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 July 27, 2026.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$103Average$286FlexibilityNo cancel feeOn-time62%
DeltaCheapest$143Average$458FlexibilityNo cancel feeOn-timeN/A
American AirlinesCheapest$186Average$475FlexibilityNo cancel feeOn-time71%
SouthwestCheapest$188Average$439FlexibilityNo cancel feeOn-time63%
United AirlinesCheapest$197Average$518FlexibilityNo cancel feeOn-time69%
JetBlueCheapest$280Average$363FlexibilityNo cancel feeOn-time62%

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