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Dulles Intl

$143+ 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 4/27. Fares are subject to change and may not be available on all flights or dates of travel.
COS — IAD
Apr 30 — May 71
Thu 4/30
Thu 5/7
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 March 31, 2026.

This United Airlines deal was found by Cheapflights users on 3/26. 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.
Tue 4/1412:18 pm
COS
-
IAD
1 stop6h 38m
United Airlines
Sat 4/185:26 pm
IAD
-
COS
1 stop6h 28m
United Airlines
Deal found 3/26$297
This American Airlines deal was found by Cheapflights users on 3/26. 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.
Tue 4/141:39 pm
COS
-
IAD
2 stops7h 27m
American Airlines
Sat 4/185:59 pm
IAD
-
COS
1 stop7h 33m
American Airlines
Deal found 3/26$302
This United Airlines deal was found by Cheapflights users on 3/26. 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.
Sat 4/2511:42 am
COS
-
IAD
1 stop5h 41m
United Airlines
Sat 5/26:15 am
IAD
-
COS
1 stop6h 32m
United Airlines
Deal found 3/26$325
This Southwest deal was found by Cheapflights users on 3/27. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 5/115:20 pm
COS
-
IAD
1 stop5h 00m
Southwest
Mon 5/185:55 pm
IAD
-
COS
1 stop6h 20m
Southwest
Deal found 3/27$361
This Southwest deal was found by Cheapflights users on 3/30. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 4/251:10 pm
COS
-
IAD
1 stop7h 45m
Southwest
Sat 5/25:50 am
IAD
-
COS
1 stop5h 25m
Southwest
Deal found 3/30$367
This Southwest deal was found by Cheapflights users on 3/28. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 4/251:10 pm
COS
-
IAD
1 stop7h 45m
Southwest
Tue 4/286:20 am
IAD
-
COS
2 stops11h 50m
Southwest
Deal found 3/28$372
This American Airlines deal was found by Cheapflights users on 3/26. 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.
Wed 4/151:39 pm
COS
-
IAD
1 stop7h 47m
American Airlines
Mon 4/205:59 pm
IAD
-
COS
1 stop7h 33m
American Airlines
Deal found 3/26$377
This American Airlines deal was found by Cheapflights users on 3/28. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 4/251:39 pm
COS
-
IAD
2 stops8h 20m
American Airlines
Sat 5/23:26 pm
IAD
-
COS
2 stops10h 06m
American Airlines
Deal found 3/28$378
This American Airlines deal was found by Cheapflights users on 3/30. 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.
Thu 4/231:39 pm
COS
-
IAD
1 stop7h 47m
American Airlines
Sat 4/259:19 am
IAD
-
COS
2 stops9h 04m
American Airlines
Deal found 3/30$393
This Southwest deal was found by Cheapflights users on 3/26. 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.
Wed 4/1512:40 pm
COS
-
IAD
1 stop9h 00m
Southwest
Fri 4/174:30 pm
IAD
-
COS
1 stop9h 35m
Southwest
Deal found 3/26$407
This United Airlines deal was found by Cheapflights users on 3/26. 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 5/2512:56 pm
COS
-
IAD
1 stop6h 26m
United Airlines
Sat 5/306:30 am
IAD
-
COS
1 stop6h 16m
United Airlines
Deal found 3/26$411
This American Airlines deal was found by Cheapflights users on 3/30. 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.
Tue 5/55:41 am
COS
-
IAD
2 stops11h 00m
American Airlines
Fri 5/87:00 am
IAD
-
COS
1 stop7h 49m
American Airlines
Deal found 3/30$412

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 March 31, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$297
(United Airlines)

One-way from

$143
(Kiwi.com)

Popular in

January

Cheapest in

August

Average price

$578
Provider with most accurate pricing for Colorado Springs-Washington, D.C. Dulles Intl flight deals.
Search Deals
Provider most trusted by Cheapflights users for Colorado Springs-Washington, D.C. Dulles Intl flights.
Search Deals
From Colorado Springs to Washington, D.C. Dulles Intl
Search Deals
One-way flight from Colorado Springs to Washington, D.C. Dulles Intl
Search Deals
Highest demand for flights based on searches. 26% potential increase in price ($163 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 4% potential price decrease ($19 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in March 2026
Search Deals

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 March 31, 2026.
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

Fly to

Route

Depart

Return

Price

Cheapest round-trip

Colorado SpringsWashington, D.C.

COS - IAD

COSIAD

Colorado Springs

Sat 4/25

1:10 pm-10:55 pm

1 stop7h 45m

Washington, D.C. Dulles Intl

Sat 5/2

5:50 am-9:15 am

1 stop5h 25m

$367
Quickest round-trip

Colorado SpringsWashington, D.C.

COS - IAD

COSIAD

Colorado Springs

Tue 5/5

4:05 pm-11:40 pm

1 stop5h 35m

Washington, D.C. Dulles Intl

Fri 5/8

5:55 am-9:20 am

1 stop5h 25m

$407

Colorado SpringsWashington, D.C.

COS - IAD

COSIAD

Colorado Springs

Wed 9/2

1:40 pm-12:10 am

1 stop8h 30m

Washington, D.C. Dulles Intl

Tue 9/8

6:00 am-12:48 pm

1 stop8h 48m

$437

Colorado SpringsWashington, D.C.

COS - IAD

COSIAD

Colorado Springs

Tue 6/30

6:00 am-2:02 pm

1 stop6h 02m

Washington, D.C. Dulles Intl

Tue 7/7

11:00 am-9:58 pm

2 stops12h 58m

$442

Colorado SpringsWashington, D.C.

COS - IAD

COSIAD

Colorado Springs

Sat 6/20

7:00 am-5:07 pm

1 stop8h 07m

Washington, D.C. Dulles Intl

Wed 6/24

11:05 am-9:48 pm

2 stops12h 43m

$442

Colorado SpringsWashington, D.C.

COS - IAD

COSIAD

Colorado Springs

Sat 5/16

11:55 am-11:32 pm

1 stop9h 37m

Washington, D.C. Dulles Intl

Wed 5/20

6:08 am-12:48 pm

1 stop8h 40m

$445

Colorado SpringsWashington, D.C.

COS - IAD

COSIAD

Colorado Springs

Sat 8/15

5:55 pm-9:10 am

2 stops13h 15m

Washington, D.C. Dulles Intl

Tue 8/18

10:40 am-9:15 pm

2 stops12h 35m

$447

Colorado SpringsWashington, D.C.

COS - IAD

COSIAD

Colorado Springs

Tue 4/14

11:55 am-11:03 pm

2 stops9h 08m

Washington, D.C. Dulles Intl

Sat 4/18

1:00 pm-11:06 pm

2 stops12h 06m

$456

Colorado SpringsWashington, D.C.

COS - IAD

COSIAD

Colorado Springs

Wed 4/29

6:00 am-4:03 pm

1 stop8h 03m

Washington, D.C. Dulles Intl

Sat 5/2

6:15 am-10:47 am

1 stop6h 32m

$457

Colorado SpringsWashington, D.C.

COS - IAD

COSIAD

Colorado Springs

Wed 6/17

6:00 am-1:26 pm

1 stop5h 26m

Washington, D.C. Dulles Intl

Thu 6/25

6:10 am-11:10 am

1 stop7h 00m

$458

Flights are sorted by cheapest round-trip flights first.

Deals found on 3/29

Showing 1-10 of 21 resultsSorted by cheapest first
1
2
3

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 March.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy1 starTrust Score*3 stars
FlightHubPrice 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, November is the cheapest month in which you can book a flight from Colorado Springs to Washington, D.C. Dulles Intl Airport (average of $160). Flying from Colorado Springs to Washington, D.C. Dulles Intl Airport in May is currently the most expensive (average of $238). 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.

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

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 March 31, 2026.
Get a feel of what it's like to fly with Southwest,Delta, andUnited 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
4,334 reviews

Comfort

8.0

Entertainment

7.5

Crew

8.6

Food

7.0

Overall

8.0

Boarding

8.1

Reviews

1 / 20
2.0
Mediocre

Dominic,Mar 2026

MCO - SMF

I had to try and sleep on the floor of the Austin airport. I spent 12 hours there. The airline policies were so poor, that a near violent argument broke out between the people in front of me and the flight attendants - making for a super stressful situation at 30,000 feet. Garbage airline choice by Kayak Garbage idea to book a flight with a layover. Next time I will pay for a quality booking myself, and somehow force the company to reimburse it.
Southwest
8.0
Very good
4,334 reviews
Southwest
8.0
Very good
4,334 reviews

Comfort

8.0

Entertainment

7.5

Crew

8.6

Food

7.0

Overall

8.0

Boarding

8.1

Reviews

1 / 20
2.0
Mediocre

Dominic,Mar 2026

MCO - SMF

I had to try and sleep on the floor of the Austin airport. I spent 12 hours there. The airline policies were so poor, that a near violent argument broke out between the people in front of me and the flight attendants - making for a super stressful situation at 30,000 feet. Garbage airline choice by Kayak Garbage idea to book a flight with a layover. Next time I will pay for a quality booking myself, and somehow force the company to reimburse it.
Delta
7.9
Good
8,363 reviews
Southwest
8.0
Very good
4,334 reviews

Comfort

8.0

Entertainment

7.5

Crew

8.6

Food

7.0

Overall

8.0

Boarding

8.1

Reviews

1 / 20
2.0
Mediocre

Dominic,Mar 2026

MCO - SMF

I had to try and sleep on the floor of the Austin airport. I spent 12 hours there. The airline policies were so poor, that a near violent argument broke out between the people in front of me and the flight attendants - making for a super stressful situation at 30,000 feet. Garbage airline choice by Kayak Garbage idea to book a flight with a layover. Next time I will pay for a quality booking myself, and somehow force the company to reimburse it.
United Airlines
7.4
Good
9,527 reviews
Southwest
8.0
Very good
4,334 reviews

Comfort

8.0

Entertainment

7.5

Crew

8.6

Food

7.0

Overall

8.0

Boarding

8.1

Reviews

1 / 20
2.0
Mediocre

Dominic,Mar 2026

MCO - SMF

I had to try and sleep on the floor of the Austin airport. I spent 12 hours there. The airline policies were so poor, that a near violent argument broke out between the people in front of me and the flight attendants - making for a super stressful situation at 30,000 feet. Garbage airline choice by Kayak Garbage idea to book a flight with a layover. Next time I will pay for a quality booking myself, and somehow force the company to reimburse it.

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 45m. 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 Southwest and United Airlines. Delta is 46% 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, November is the cheapest month in which you can book a flight from Colorado Springs to Washington, D.C. Dulles Intl Airport (average of $160). Flying from Colorado Springs to Washington, D.C. Dulles Intl Airport in May is currently the most expensive (average of $238). 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
Owings Mills
Arlington
Springfield
Silver Spring
Herndon
Hyattsville
Hanover
Laurel
Rockville
Upper Marlboro
Fredericksburg
Largo
Bowie
Clinton
Towson
Cordova
Manassas

Browse thousands of different options on Cheapflights for your next trip

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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 March 31, 2026.
AirlineCheapestAverageFlexibilityOn-time
DeltaCheapest$236Average$262FlexibilityNo cancel feeOn-timeN/A
SouthwestCheapest$267Average$367FlexibilityNo cancel feeOn-time63%
United AirlinesCheapest$307Average$421FlexibilityNo cancel feeOn-time69%

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