Cheap flights from Colorado Springs (COS) to Dulles Intl (IAD) from $157

This is the cheapest one-way flight price, found on 9/26. Prices may vary by date and flight preferences.
COS — IAD
Oct 3 — Oct 101

How to find the cheapest flight from Colorado Springs (COS) to Dulles Intl (IAD)

All the information you need to plan the best COS to IAD flight in 2023: compare Colorado Springs to Dulles Intl flight prices with the expected peak season, weather and rainfall in Dulles Intl.

Popular in

March

Cheapest in

August

Round-trip from

$237

One-way from

$203
High demand for flights, 21% potential price rise
Best time to find cheap flights, 37% potential price drop
From Colorado Springs to Washington, D.C. Dulles Intl
One-way flight from Colorado Springs to Washington, D.C. Dulles Intl

COS - WAS

Price

$237 - $374

WAS

Temperature

35.6 - 80.6 °F

WAS

Rainfall

2.6 - 4 inches

How far in advance should I book a flight from Colorado Springs to Washington, D.C. Dulles Intl Airport?

Users have found that booking a flight from Colorado Springs to Washington, D.C. Dulles Intl Airport at least 61 days early can save you up to 59% on average compared to booking a flight this week. If booking 61 days before your flight isn’t an option for you, users have found flights from Colorado Springs to Washington, D.C. Dulles Intl Airport for as little as $639 when booking for a departure date within the next two weeks. You can also check prices now. Some users have found airline tickets as low as $687 for flights departing within the next 3 days.

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

October is one of the best times of the year to fly to Washington, D.C. Dulles Intl Airport from Colorado Springs. Prices for October average $553 per person but you can even find prices for as low as $311. The most expensive prices can be found in the month of January. Opting for a October flight can save you 31% on your journey compared to booking in January

When is the cheapest time to fly from Colorado Springs to Washington, D.C. Dulles Intl Airport (COS - IAD)?

When flying from Colorado Springs to Washington, D.C. Dulles Intl Airport, the time of day you decide to fly out makes little to no difference towards the overall price you’ll pay on tickets.

Cheap United Airlines flights from Colorado Springs to Dulles Intl

Check out some of the cheapest United Airlines flights we've come across from Colorado Springs to Washington, D.C.. Make sure to double check the flight details before booking.

Cheap American Airlines flights from Colorado Springs to Dulles Intl

Browse through some of the cheapest American Airlines flights traveling from Colorado Springs to Washington, D.C.. If these deals don't fit your criteria, make sure to check back soon as new deals are always added.

Cheap Colorado Springs to Dulles Intl flights in September & October 2023

The best prices found for COS to IAD flights for September, October
Scroll through some of the best deals on flights from Colorado Springs to Washington, D.C. in 2023. Check back soon for alternative fares.

Colorado Springs to Dulles Intl 2023 flight deals

Cheap flights to Dulles Intl from Colorado Springs found for this year
Scroll through some of the best deals on flights from Colorado Springs to Washington, D.C. in 2023. Check back soon for alternative fares.

Colorado Springs to Dulles Intl flights leaving soon

Late deals on return flights to Dulles Intl from Colorado Springs, departing today and this week
Book one of these great deals on flights from Colorado Springs to Washington, D.C.. Users should be sure to double check the price, date, and time of their last-minute flight.

One-way flights to Dulles Intl from Colorado Springs

The cheapest one-way flights from Colorado Springs to Dulles Intl
Some of the best available deals we've found on one-way flights from Colorado Springs to Washington, D.C.. Those needing a return flight from Colorado Springs to Washington, D.C. can use the search form above.

Find flights from Colorado Springs to Dulles Intl within your budget

Use the slider to find flights from Colorado Springs to Dulles Intl that fit your budget.

Fly from

Any airport

Fly to

Any airport

Budget

$325 - $617

Route

Depart

Return

Price

Colorado SpringsWashington, D.C. Dulles Intl

COS - IAD

COSIAD

Colorado Springs

Fri 10/13

1 stop7h 53m

Washington, D.C. Dulles Intl

Sat 10/21

1 stop6h 40m

Colorado SpringsWashington, D.C. Dulles Intl

COS - IAD

COSIAD

Colorado Springs

Fri 10/27

1 stop6h 28m

Washington, D.C. Dulles Intl

Fri 11/3

1 stop6h 40m

Colorado SpringsWashington, D.C. Dulles Intl

COS - IAD

COSIAD

Colorado Springs

Wed 11/1

2 stops11h 23m

Washington, D.C. Dulles Intl

Sun 11/5

1 stop8h 48m

Colorado SpringsWashington, D.C. Dulles Intl

COS - IAD

COSIAD

Colorado Springs

Fri 10/27

1 stop8h 32m

Washington, D.C. Dulles Intl

Fri 11/3

2 stops12h 38m

Colorado SpringsWashington, D.C. Dulles Intl

COS - IAD

COSIAD

Colorado Springs

Fri 12/1

1 stop8h 14m

Washington, D.C. Dulles Intl

Sun 12/3

2 stops13h 06m

Colorado SpringsWashington, D.C. Dulles Intl

COS - IAD

COSIAD

Colorado Springs

Mon 11/20

1 stop5h 30m

Washington, D.C. Dulles Intl

Fri 11/24

1 stop8h 13m

Colorado SpringsWashington, D.C. Dulles Intl

COS - IAD

COSIAD

Colorado Springs

Mon 10/16

1 stop7h 53m

Washington, D.C. Dulles Intl

Wed 10/25

1 stop6h 02m

Colorado SpringsWashington, D.C. Dulles Intl

COS - IAD

COSIAD

Colorado Springs

Thu 11/16

1 stop7h 57m

Washington, D.C. Dulles Intl

Sun 11/19

1 stop14h 35m

Colorado SpringsWashington, D.C. Dulles Intl

COS - IAD

COSIAD

Colorado Springs

Fri 12/15

2 stops13h 33m

Washington, D.C. Dulles Intl

Tue 1/2

1 stop6h 19m

Flights are sorted by cheapest first

Deals found on 9/27

Reviews of airlines servicing Dulles Intl

Read through reviews of airlines operating flights from Colorado Springs to Washington, D.C., such as United Airlines, American Airlines and Delta. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
Delta
7.9
Good
3,023 reviews

Crew

8.5

Boarding

8.0

Food

7.2

Comfort

7.9

Entertainment

7.8

Overall

7.9

Reviews

1 / 10

This was the worst flying experience of my life. Every step of the way I was given the wrong information and/or mocked by the KLM employees. Never flying this airline again.

Delta
7.9
Good
3,023 reviews
Delta
7.9
Good
3,023 reviews

Crew

8.5

Boarding

8.0

Food

7.2

Comfort

7.9

Entertainment

7.8

Overall

7.9

Reviews

1 / 10

This was the worst flying experience of my life. Every step of the way I was given the wrong information and/or mocked by the KLM employees. Never flying this airline again.

United Airlines
7.4
Good
1,890 reviews
Delta
7.9
Good
3,023 reviews

Crew

8.5

Boarding

8.0

Food

7.2

Comfort

7.9

Entertainment

7.8

Overall

7.9

Reviews

1 / 10

This was the worst flying experience of my life. Every step of the way I was given the wrong information and/or mocked by the KLM employees. Never flying this airline again.

American Airlines
7.2
Good
2,635 reviews
Delta
7.9
Good
3,023 reviews

Crew

8.5

Boarding

8.0

Food

7.2

Comfort

7.9

Entertainment

7.8

Overall

7.9

Reviews

1 / 10

This was the worst flying experience of my life. Every step of the way I was given the wrong information and/or mocked by the KLM employees. Never flying this airline again.

Related info for your journey

Useful info, stats and facts about Colorado Springs to Dulles Intl flights.

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.

Can I find flights from Colorado Springs to Washington, D.C. Dulles Intl Airport for under $400 on Cheapflights?

Yes, there are multiple flights from Colorado Springs to Washington, D.C. Dulles Intl Airport for under $400. The cheapest flight booked recently is on United Airlines for just $325, but on average you can expect to pay $423.

Are there last-minute flights available from Colorado Springs to Washington, D.C. Dulles Intl Airport for under $400?

There are currently 20+ open flights from Colorado Springs to Washington, D.C. Dulles Intl Airport within the next 7 days for less than $400.

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

United Airlines, at $325, 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 American Airlines and Delta. United Airlines is 43% 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 United Airlines, with whom users have recently found tickets for as low as $157. However, be on the lookout for offers from American Airlines and Delta, as they are both options that can get you from Colorado Springs to Washington, D.C. Dulles Intl Airport for a low price.

What are the most popular airlines that fly from Colorado Springs to Washington, D.C. Dulles Intl Airport?

What does COS to IAD mean?

COS stands for Colorado Springs Airport, while IAD stands for Washington, D.C. Dulles Intl Airport. These codes are often called IATA codes, a set of identifiers established by IATA (International Air Transport Association) that is widely used by airlines and the aviation industry.

Alternative routes for Colorado Springs to Dulles Intl

See prices for flight routes from nearby airports that may be better suited for you.

Top 3 airlines flying from Colorado Springs to Dulles Intl

The chart below displays the airlines Cheapflights users traveling from Colorado Springs to Dulles Intl choose most often. Cheapest and average prices are based on aggregated data from the past 12 months.
AirlineCheapestAverageFlexibilityOn-time
American AirlinesCheapest$265Average$436FlexibilityNo cancel feeOn-time71%
Search American Airlines flights
United AirlinesCheapest$289Average$494FlexibilityNo cancel feeOn-time69%
Search United Airlines flights
DeltaCheapest$383Average$568FlexibilityNo cancel feeOn-timeN/A
Search Delta flights

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How does Cheapflights help users find flights from Colorado Springs to Dulles Intl?

Deals for Colorado Springs to Dulles Intl flights are sourced from 900+ travel sites when you use Cheapflights. When all flight results come back, Cheapflights lets you sort and filter flights using different criteria to choose better, like price, airport, cabin class, and plenty of other options.

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Can Cheapflights find flights from Colorado Springs to Dulles Intl with no change fees?

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Yes! Start tracking prices for Colorado Springs to Dulles Intl flights today and get alerted whenever prices for these flights change. To access this feature, navigate to the search form above to perform a search, which will then prompt you for a valid email address to use the tool.

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