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Dulles Intl

$119+ 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 1/20. Fares are subject to change and may not be available on all flights or dates of travel.
COS — IAD
oct. 31 — nov. 71
vie. 10/31
vie. 11/7
1 adult, Economy
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Cheap 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 octubre 1, 2025.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$251
(Delta)

One-way from

$119
(Delta)

Popular in

January

Cheapest in

February

Average price

$472
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
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Highest demand for flights based on searches. 3% potential increase in price ($16 potential increase over avg. RT price).
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Cheapest flight prices on average. 2% potential price decrease ($11 potential savings vs. average RT price).
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Average for round-trip flights in October 2025
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Find 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 octubre 1, 2025.

This American Airlines deal was found by Cheapflights users on 9/30. 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.
mié. 10/296:02 amCOS - IAD
2 stops10h 52mAmerican Airlines
mié. 11/56:04 amIAD - COS
1 stop7h 44mAmerican Airlines
Deal found 9/30$256
This Delta deal was found by Cheapflights users on 9/29. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
lun. 11/31:16 pmCOS - IAD
1 stop8h 03mDelta
mié. 11/57:05 amIAD - COS
1 stop7h 06mDelta
Deal found 9/29$268
This American Airlines deal was found by Cheapflights users on 9/30. 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.
sáb. 11/112:09 pmCOS - IAD
1 stop7h 22mAmerican Airlines
mié. 11/56:04 amIAD - COS
1 stop7h 44mAmerican Airlines
Deal found 9/30$280
This Delta deal was found by Cheapflights users on 9/28. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
jue. 11/61:16 pmCOS - IAD
1 stop8h 04mDelta
lun. 11/107:01 amIAD - COS
1 stop7h 36mDelta
Deal found 9/28$285
This American Airlines deal was found by Cheapflights users on 9/29. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mié. 12/312:36 pmCOS - IAD
2 stops8h 32mAmerican Airlines
mié. 12/176:00 amIAD - COS
1 stop7h 46mAmerican Airlines
Deal found 9/29$296
This United Airlines deal was found by Cheapflights users on 9/30. 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.
mié. 12/2412:49 pmCOS - IAD
1 stop6h 36mUnited Airlines
dom. 1/45:20 pmIAD - COS
1 stop6h 46mUnited Airlines
Deal found 9/30$298

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 octubre 1, 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

mié. 10/29

6:02 am-6:54 pm

2 stops10h 52m

Washington, D.C. Dulles Intl

mié. 11/5

6:04 am-11:48 am

1 stop7h 44m

$256

Colorado SpringsWashington, D.C.

COS - IAD

COSIAD

Colorado Springs

lun. 11/3

1:16 pm-11:19 pm

1 stop8h 03m

Washington, D.C. Dulles Intl

mié. 11/5

7:05 am-12:11 pm

1 stop7h 06m

$268

Colorado SpringsWashington, D.C.

COS - IAD

COSIAD

Colorado Springs

vie. 11/7

5:30 am-5:05 pm

1 stop9h 35m

Washington, D.C. Dulles Intl

mié. 11/12

7:40 am-11:40 am

1 stop6h 00m

$280

Colorado SpringsWashington, D.C.

COS - IAD

COSIAD

Colorado Springs

mié. 12/3

1:42 pm-9:29 pm

1 stop5h 47m

Washington, D.C. Dulles Intl

mié. 12/17

7:01 am-12:36 pm

1 stop7h 35m

$280

Colorado SpringsWashington, D.C.

COS - IAD

COSIAD

Colorado Springs

jue. 11/6

5:45 am-4:11 pm

1 stop8h 26m

Washington, D.C. Dulles Intl

lun. 11/10

6:04 am-11:48 am

1 stop7h 44m

$285

Colorado SpringsWashington, D.C.

COS - IAD

COSIAD

Colorado Springs

jue. 11/6

1:16 pm-11:20 pm

1 stop8h 04m

Washington, D.C. Dulles Intl

lun. 11/10

7:01 am-12:37 pm

1 stop7h 36m

$285

Colorado SpringsWashington, D.C.

COS - IAD

COSIAD

Colorado Springs

mié. 12/3

12:36 pm-11:08 pm

2 stops8h 32m

Washington, D.C. Dulles Intl

mié. 12/17

6:00 am-11:46 am

1 stop7h 46m

$296

Colorado SpringsWashington, D.C.

COS - IAD

COSIAD

Colorado Springs

jue. 10/23

11:30 am-7:23 pm

1 stop5h 53m

Washington, D.C. Dulles Intl

sáb. 10/25

2:45 pm-8:15 pm

1 stop7h 30m

$297

Colorado SpringsWashington, D.C.

COS - IAD

COSIAD

Colorado Springs

mié. 12/24

12:49 pm-9:25 pm

1 stop6h 36m

Washington, D.C. Dulles Intl

dom. 1/4

5:20 pm-10:06 pm

1 stop6h 46m

$298

Colorado SpringsWashington, D.C.

COS - IAD

COSIAD

Colorado Springs

mar. 10/21

1:16 pm-11:18 pm

1 stop8h 02m

$126

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/28

Showing 1-10 of 20 results
1
2

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 October.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy2 starsTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*3 stars
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 FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on Colorado Springs-Washington, D.C. Dulles Intl Airport flight deals on Cheapflights vs. FlightHub >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 FlightHub the most. FlightHub 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, August is the cheapest month in which you can book a flight from Colorado Springs to Washington, D.C. Dulles Intl Airport (average of $292). Flying from Colorado Springs to Washington, D.C. Dulles Intl Airport in April is currently the most expensive (average of $337). 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 octubre 1, 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
4,248 reviews

Entertainment

7.5

Boarding

8.1

Comfort

8.0

Food

7.0

Overall

8.0

Crew

8.6

Reviews

1 / 20
2.0
Mediocre

Mike,Aug 2025

OKC - AUS

AC was not adequate, even on a night flight. WiFi subpar even for the airlines
Southwest
8.0
Very good
4,248 reviews
Southwest
8.0
Very good
4,248 reviews

Entertainment

7.5

Boarding

8.1

Comfort

8.0

Food

7.0

Overall

8.0

Crew

8.6

Reviews

1 / 20
2.0
Mediocre

Mike,Aug 2025

OKC - AUS

AC was not adequate, even on a night flight. WiFi subpar even for the airlines
Delta
8.0
Very good
7,961 reviews
Southwest
8.0
Very good
4,248 reviews

Entertainment

7.5

Boarding

8.1

Comfort

8.0

Food

7.0

Overall

8.0

Crew

8.6

Reviews

1 / 20
2.0
Mediocre

Mike,Aug 2025

OKC - AUS

AC was not adequate, even on a night flight. WiFi subpar even for the airlines
United Airlines
7.4
Good
8,929 reviews
Southwest
8.0
Very good
4,248 reviews

Entertainment

7.5

Boarding

8.1

Comfort

8.0

Food

7.0

Overall

8.0

Crew

8.6

Reviews

1 / 20
2.0
Mediocre

Mike,Aug 2025

OKC - AUS

AC was not adequate, even on a night flight. WiFi subpar even for the airlines

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 8h 03m. 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?

    United Airlines, at $228, 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 Delta and Southwest. United Airlines 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, August is the cheapest month in which you can book a flight from Colorado Springs to Washington, D.C. Dulles Intl Airport (average of $292). Flying from Colorado Springs to Washington, D.C. Dulles Intl Airport in April is currently the most expensive (average of $337). 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
Woodbridge
Arlington
Alexandria
Tysons
Silver Spring
Springfield
Hanover
Gaithersburg
Fredericksburg
Fairfax
Linthicum Heights
Falls Church
Owings Mills
Manassas
Oxon Hill
Laurel
Towson
National Harbor
Dundalk
Waldorf

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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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Vail to Reagan-National flights
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Hayden to Dulles Intl flights
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Gunnison to Baltimore flights
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Hayden to Reagan-National flights

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 octubre 1, 2025.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest$228Average$368FlexibilityNo cancel feeOn-time69%
DeltaCheapest$236Average$262FlexibilityNo cancel feeOn-timeN/A
SouthwestCheapest$281Average$382FlexibilityNo cancel feeOn-time63%

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