HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
Dulles Intl

$145+ 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 1/28. Fares are subject to change and may not be available on all flights or dates of travel.
COS — IAD
Jan 8 — Jan 151
Wed 1/8
Wed 1/15
1 adult, Economy
We work with more than 300 partners to bring you better travel deals

Find cheap flights from Colorado Springs to Dulles Intl with Cheapflights

1. Tell us where you want to go
Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”
2. Select your favorite providers
We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.
3. Compare prices and book
Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.

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 January 3, 2025.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$264
(American Airlines)

One-way from

$145
(American Airlines)

Popular in

February

Cheapest in

August

Average price

$454
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
High demand for flights, 6% potential price rise
Search Deals
Best time to find cheap flights, 1% potential price drop
Search Deals
Average for round-trip flights in January 2025
Search Deals

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 January 3, 2025.

This American Airlines deal was found by Cheapflights users on 1/2. 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 2/126:00 amCOS - IAD
1 stop8h 14mAmerican Airlines
Wed 2/195:13 pmIAD - COS
1 stop7h 16mAmerican Airlines
Deal found 1/2$264
This Delta deal was found by Cheapflights users on 1/2. 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.
Wed 2/128:20 amCOS - IAD
2 stops12h 53mDelta
Wed 2/1912:29 pmIAD - COS
2 stops10h 36mDelta
Deal found 1/2$283
This United Airlines deal was found by Cheapflights users on 1/2. 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.
Wed 1/2211:38 amCOS - IAD
1 stop7h 45mUnited Airlines
Mon 1/275:20 pmIAD - COS
1 stop6h 38mUnited Airlines
Deal found 1/2$323
This Southwest deal was found by Cheapflights users on 1/2. 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 1/276:15 amCOS - IAD
1 stop6h 50mSouthwest
Mon 1/275:50 pmIAD - COS
1 stop5h 45mSouthwest
Deal found 1/2$413

Find flights from Colorado Springs to Dulles Intl within your budget

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 January 3, 2025.

Fly from

Any airport

Fly to

Any airport

Route

Depart

Return

Price

Colorado SpringsWashington, D.C.

COS - IAD

COSIAD

Colorado Springs

Wed 2/12

6:00 am-4:14 pm

1 stop8h 14m

Washington, D.C. Dulles Intl

Wed 2/19

5:13 pm-10:29 pm

1 stop7h 16m

$264

Colorado SpringsWashington, D.C.

COS - IAD

COSIAD

Colorado Springs

Wed 2/12

8:20 am-11:13 pm

2 stops12h 53m

Washington, D.C. Dulles Intl

Wed 2/19

12:29 pm-9:05 pm

2 stops10h 36m

$283

Colorado SpringsWashington, D.C.

COS - IAD

COSIAD

Colorado Springs

Wed 1/22

11:38 am-9:23 pm

1 stop7h 45m

Washington, D.C. Dulles Intl

Mon 1/27

5:20 pm-9:58 pm

1 stop6h 38m

$323

Colorado SpringsWashington, D.C.

COS - IAD

COSIAD

Colorado Springs

Mon 1/27

6:15 am-3:05 pm

1 stop6h 50m

Washington, D.C. Dulles Intl

Mon 1/27

5:50 pm-9:35 pm

1 stop5h 45m

$413

Colorado SpringsWashington, D.C.

COS - IAD

COSIAD

Colorado Springs

Tue 1/28

6:00 am-4:14 pm

1 stop8h 14m

$145

Colorado SpringsWashington, D.C.

COS - IAD

COSIAD

Colorado Springs

Wed 2/5

8:20 am-11:36 pm

2 stops13h 16m

$151

Colorado SpringsWashington, D.C.

COS - IAD

COSIAD

Colorado Springs

Wed 2/19

8:20 am-3:33 pm

1 stop5h 13m

$160

Flights are sorted by cheapest round-trip flights first.

Deals found on 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 January.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy1 starTrust 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.

Travel insights for flights from Colorado Springs to Dulles Intl

Get recent, data-driven insights about flights from Colorado Springs to Dulles Intl including ideal travel times, pricing trends, and more.

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 $309). Flying from Colorado Springs to Washington, D.C. Dulles Intl Airport in June is currently the most expensive (average of $389). 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.

Rainfall in Dulles Intl by month

Plan your trip to Dulles Intl by taking into account the average rainfall totals by month.

In terms of precipitation, rainfall in Washington, D.C. Dulles Intl Airport ranges from 2.6 - 4.0 inches per month. May is typically the wettest month, when rainfall can reach 4.0 in. February is typically the driest time to visit Washington, D.C. Dulles Intl Airport when rainfall is around 2.6 in.

Temperature in Dulles Intl by month

Plan your trip to Dulles Intl by taking into account the average temperature totals by month.

If weather is an important factor for your trip to Washington, D.C. Dulles Intl Airport, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 80.6 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 35.6 F).

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 January 3, 2025.
Read through reviews of airlines operating flights from Colorado Springs to Washington, D.C., such as American Airlines, Delta and Southwest. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
Southwest
8.1
Very good
4,688 reviews

Overall

8.1

Food

7.2

Boarding

8.2

Crew

8.7

Comfort

8.1

Entertainment

7.7

Reviews

1 / 10

We BARELY made the connection and when we got onboard we were treated like disobedient children who should have arrived earlier because we had to ask other passengers to move so we could sit with our kids. The flight attendants on the first flight were nice but the second one, they were snippy and fairly rude.

Southwest
8.1
Very good
4,688 reviews
Southwest
8.1
Very good
4,688 reviews

Overall

8.1

Food

7.2

Boarding

8.2

Crew

8.7

Comfort

8.1

Entertainment

7.7

Reviews

1 / 10

We BARELY made the connection and when we got onboard we were treated like disobedient children who should have arrived earlier because we had to ask other passengers to move so we could sit with our kids. The flight attendants on the first flight were nice but the second one, they were snippy and fairly rude.

Delta
8.0
Very good
8,536 reviews
Southwest
8.1
Very good
4,688 reviews

Overall

8.1

Food

7.2

Boarding

8.2

Crew

8.7

Comfort

8.1

Entertainment

7.7

Reviews

1 / 10

We BARELY made the connection and when we got onboard we were treated like disobedient children who should have arrived earlier because we had to ask other passengers to move so we could sit with our kids. The flight attendants on the first flight were nice but the second one, they were snippy and fairly rude.

United Airlines
7.4
Good
8,966 reviews
Southwest
8.1
Very good
4,688 reviews

Overall

8.1

Food

7.2

Boarding

8.2

Crew

8.7

Comfort

8.1

Entertainment

7.7

Reviews

1 / 10

We BARELY made the connection and when we got onboard we were treated like disobedient children who should have arrived earlier because we had to ask other passengers to move so we could sit with our kids. The flight attendants on the first flight were nice but the second one, they were snippy and fairly rude.

American Airlines
7.2
Good
10,000 reviews
Southwest
8.1
Very good
4,688 reviews

Overall

8.1

Food

7.2

Boarding

8.2

Crew

8.7

Comfort

8.1

Entertainment

7.7

Reviews

1 / 10

We BARELY made the connection and when we got onboard we were treated like disobedient children who should have arrived earlier because we had to ask other passengers to move so we could sit with our kids. The flight attendants on the first flight were nice but the second one, they were snippy and fairly rude.

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.

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

    American Airlines, at $264, 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 United Airlines. American Airlines is 45% cheaper than the average price of flights available within the next 90 days to this destination.

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

    The cheapest airline one-way is American Airlines, with whom users have recently found tickets for as low as $145. However, be on the lookout for offers from Delta and United Airlines, as they are both options that can get you from Colorado Springs to Washington, D.C. Dulles Intl Airport for a low price.

  • 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 $309). Flying from Colorado Springs to Washington, D.C. Dulles Intl Airport in June is currently the most expensive (average of $389). 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

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Alternative routes for Colorado Springs to Dulles Intl

See prices for flight routes from nearby airports that may be better suited for you.
Denver to Dulles Intl flights
Denver to Baltimore flights
Denver to Reagan-National flights
Colorado Springs to Baltimore flights
Grand Junction to Dulles Intl flights
Colorado Springs to Reagan-National flights
Aspen to Dulles Intl flights
Aspen to Baltimore flights
Vail to Dulles Intl flights
Hayden to Dulles Intl flights
Aspen to Reagan-National flights
Grand Junction to Baltimore flights
Hayden to Baltimore flights
Vail to Baltimore flights
Montrose to Reagan-National flights
Hayden to Reagan-National flights
Montrose to Dulles Intl flights
Grand Junction to Reagan-National flights
Vail to Reagan-National flights
Montrose to Baltimore flights
Gunnison to Baltimore flights
Durango to Reagan-National flights
Gunnison to Dulles Intl flights
Durango to Dulles Intl flights
Durango to Baltimore 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 January 3, 2025.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest$228Average$504FlexibilityNo cancel feeOn-time69%
American AirlinesCheapest$236Average$562FlexibilityNo cancel feeOn-time71%
DeltaCheapest$268Average$548FlexibilityNo cancel feeOn-timeN/A
100% Free
Cheapflights is completely free to use, so you can start saving the moment you arrive.
Book with Flexibility
Our users can plan ahead with confidence and find flights with no change fees
Travel Smart
Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.