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Dulles Intl

$166+ Cheap flights from Colorado Springs (COS) to Dulles Intl (IAD)

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 1/9. Fares are subject to change and may not be available on all flights or dates of travel.
COS — IAD
Jan 27 — Feb 31
Tue 1/27
Tue 2/3
1 adult, Economy
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Cheap flight deals from Colorado Springs to Dulles Intl

Cheapest flights from Colorado Springs to Dulles Intl
Explore the most affordable flight options available from Colorado Springs to Dulles Intl. Find the lowest fares from popular airlines and budget airlines, with prices last updated on December 28, 2025.

This American Airlines 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/2912:38 pmCOS - IAD
2 stops18h 04mAmerican Airlines
Fri 1/29:12 amIAD - COS
2 stops16h 35mAmerican Airlines
Deal found 12/26$708
This United Airlines 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/293:38 pmCOS - IAD
2 stops13h 57mUnited Airlines
Fri 1/26:30 amIAD - COS
1 stop6h 54mUnited Airlines
Deal found 12/26$789
This Southwest 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/296:00 amCOS - IAD
1 stop5h 05mSouthwest
Fri 1/27:50 pmIAD - COS
1 stop5h 40mSouthwest
Deal found 12/26$827
This American Airlines 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 12/2612:38 pmCOS - IAD
1 stop7h 55mAmerican Airlines
Sun 12/286:05 amIAD - COS
1 stop7h 42mAmerican Airlines
Deal found 12/26$957
This United Airlines 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 12/267:40 amCOS - IAD
2 stops6h 50mUnited Airlines
Sun 12/286:08 amIAD - COS
1 stop7h 18mUnited Airlines
Deal found 12/26$1,517

Find flight deals from Colorado Springs to Dulles Intl

Discover tips and strategies to find the most affordable flight options for your journey from Colorado Springs (COS) to Dulles Intl (IAD). 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

eDreams
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$323
(Southwest)

One-way from

$166
(Kiwi.com)

Popular in

January

Cheapest in

February

Average price

$576
Provider with most accurate pricing for Colorado Springs-Washington, D.C. Dulles Intl flight deals.
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Provider most trusted by Cheapflights users for Colorado Springs-Washington, D.C. Dulles Intl flights.
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From Colorado Springs to Washington, D.C. Dulles Intl
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One-way flight from Colorado Springs to Washington, D.C. Dulles Intl
Search Deals
Highest demand for flights based on searches. 19% potential increase in price ($97 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 5% potential price decrease ($21 potential savings vs. average RT price).
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Average for round-trip flights in December 2025
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Cheapflights Fare Finder

 
Customize your flight search to find flights from Colorado Springs to Dulles Intl 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 Colorado Springs to Washington, D.C. Dulles Intl Airport that are best for you.

Fly from

Colorado Springs

Fly to

Dulles Intl

Route

Depart

Return

Price

Colorado SpringsWashington, D.C.

COS - IAD

COSIAD

Colorado Springs

Sun 1/18

6:40 am-3:50 pm

1 stop7h 10m

Washington, D.C. Dulles Intl

Tue 1/27

9:05 am-3:55 pm

1 stop8h 50m

$323

Colorado SpringsWashington, D.C.

COS - IAD

COSIAD

Colorado Springs

Sun 1/18

12:00 pm-11:48 pm

1 stop9h 48m

Washington, D.C. Dulles Intl

Tue 1/27

12:32 pm-10:23 pm

2 stops11h 51m

$328

Colorado SpringsWashington, D.C.

COS - IAD

COSIAD

Colorado Springs

Wed 3/11

8:45 am-6:47 pm

1 stop8h 02m

Washington, D.C. Dulles Intl

Wed 3/18

9:47 am-2:20 pm

1 stop6h 33m

$365

Colorado SpringsWashington, D.C.

COS - IAD

COSIAD

Colorado Springs

Sat 2/14

8:00 am-3:44 pm

1 stop5h 44m

Washington, D.C. Dulles Intl

Wed 2/18

5:10 pm-10:02 pm

1 stop6h 52m

$375

Colorado SpringsWashington, D.C.

COS - IAD

COSIAD

Colorado Springs

Fri 1/16

12:00 pm-11:48 pm

1 stop9h 48m

Washington, D.C. Dulles Intl

Sun 1/18

6:20 am-12:22 pm

1 stop8h 02m

$379

Colorado SpringsWashington, D.C.

COS - IAD

COSIAD

Colorado Springs

Thu 3/12

3:25 pm-11:20 pm

1 stop5h 55m

Washington, D.C. Dulles Intl

Thu 3/19

7:59 pm-11:56 pm

1 stop5h 57m

$379

Colorado SpringsWashington, D.C.

COS - IAD

COSIAD

Colorado Springs

Thu 1/29

12:00 pm-11:48 pm

1 stop9h 48m

Washington, D.C. Dulles Intl

Sun 2/1

6:00 am-12:23 pm

1 stop8h 23m

$382

Colorado SpringsWashington, D.C.

COS - IAD

COSIAD

Colorado Springs

Thu 2/5

12:03 pm-11:48 pm

1 stop9h 45m

Washington, D.C. Dulles Intl

Sun 2/8

7:15 am-12:23 pm

1 stop7h 08m

$382

Colorado SpringsWashington, D.C.

COS - IAD

COSIAD

Colorado Springs

Sat 1/24

12:00 pm-11:48 pm

1 stop9h 48m

Washington, D.C. Dulles Intl

Sun 1/25

6:00 am-12:36 pm

1 stop8h 36m

$382

Colorado SpringsWashington, D.C.

COS - IAD

COSIAD

Colorado Springs

Sat 1/24

12:00 pm-11:48 pm

1 stop9h 48m

$189

Flights are sorted by cheapest round-trip flights first.

Deals found on 12/27

Showing 1-10 of 19 results
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Compare providers for flights from Colorado Springs to Dulles Intl

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

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

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

Currently, March is the cheapest month in which you can book a flight from Colorado Springs to Washington, D.C. Dulles Intl Airport (average of $146). Flying from Colorado Springs to Washington, D.C. Dulles Intl Airport in June is currently the most expensive (average of $236). 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.

Reviews of airlines servicing Dulles Intl

Get insights into the airlines that provide service to Dulles Intl. 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 Dulles Intl. Reviews last updated December 28, 2025.
Get a feel of what it's like to fly with Southwest, Delta, and United Airlines from Colorado Springs to Washington, D.C. Dulles Intl Airport by reading reviews from past customers. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
Southwest
8.0
Very good
4,256 reviews

Entertainment

7.5

Food

7.0

Comfort

8.0

Crew

8.6

Boarding

8.1

Overall

8.0

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
4,256 reviews
Southwest
8.0
Very good
4,256 reviews

Entertainment

7.5

Food

7.0

Comfort

8.0

Crew

8.6

Boarding

8.1

Overall

8.0

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
Delta
7.9
Good
8,021 reviews
Southwest
8.0
Very good
4,256 reviews

Entertainment

7.5

Food

7.0

Comfort

8.0

Crew

8.6

Boarding

8.1

Overall

8.0

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
9,116 reviews
Southwest
8.0
Very good
4,256 reviews

Entertainment

7.5

Food

7.0

Comfort

8.0

Crew

8.6

Boarding

8.1

Overall

8.0

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 Colorado Springs to Dulles Intl. 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 Colorado Springs to Washington, D.C. Dulles Intl?

    Located just 6.7 mi from the city center, Colorado Springs is the airport most travelers will use when flying to Washington, D.C. Dulles Intl from Colorado Springs. Booking flights from Colorado Springs (COS) to Washington, D.C. Dulles Intl should be relatively easy as there are 0 daily outbound flights to Washington, D.C. Dulles Intl from 3 different airlines.

  • How long is the flight from Colorado Springs to Washington, D.C. Dulles Intl Airport?

    Departing from Colorado Springs to Washington, D.C. Dulles Intl Airport will take you 7h 10m. The distance from Colorado Springs to Washington, D.C. Dulles Intl Airport is about 1459 mi. This flight may include one or multiple stops.

  • What are the cheapest airlines flying from Colorado Springs to Washington, D.C. Dulles Intl Airport round-trip?

    Delta, at $236, was found to be the cheapest airline from Colorado Springs to Washington, D.C. Dulles Intl Airport.Alternate airlines to your destination round-trip include United Airlines and Southwest. Delta is 41% cheaper than the average price of flights available within the next 90 days to this destination.

  • Can I find deals for flights from Colorado Springs to Dulles Intl that include hotel bookings?

    Yes. In addition to deals on Colorado Springs to Dulles Intl flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Colorado Springs to Dulles Intl?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Colorado Springs to Dulles Intl.

  • Can I find deals for business class flights from Colorado Springs to Dulles Intl?

    Yes. Cheapflights offers flight deals from Colorado Springs to Dulles Intl 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 Springs to Washington, D.C. Dulles Intl Airport?

    Currently, March is the cheapest month in which you can book a flight from Colorado Springs to Washington, D.C. Dulles Intl Airport (average of $146). Flying from Colorado Springs to Washington, D.C. Dulles Intl Airport in June is currently the most expensive (average of $236). 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
Alexandria
Woodbridge
Tysons
Arlington
Owings Mills
Springfield
Hanover
Silver Spring
Fredericksburg
Linthicum Heights
Rockville
Laurel
Towson
Manassas
National Harbor
Bowie
Largo
McLean
Clinton
Cordova

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Alternative routes for Colorado Springs to Dulles Intl

See prices for flight routes from nearby airports that may be better suited for you.
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Top 3 airlines flying from Colorado Springs to Dulles Intl

Discover the top 3 airlines that operate flights from Colorado Springs to Dulles Intl. 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
DeltaCheapest$236Average$262FlexibilityNo cancel feeOn-timeN/A
United AirlinesCheapest$272Average$371FlexibilityNo cancel feeOn-time69%
SouthwestCheapest$281Average$367FlexibilityNo cancel feeOn-time63%

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