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

American 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 United Airlines and Delta. American Airlines is 41% cheaper than the average price of flights available within the next 90 days to this destination.

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

Travelers seeking maximum savings on their Colorado Springs to Washington, D.C. Dulles Intl Airport flight should consider departing on Wednesday at noon when fares are most often at their lowest. Monday mornings flights should be avoided if possible as fares are typically the most expensive at this time.

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.

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).

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

The most popular airlines flying from Colorado Springs to Washington, D.C. Dulles Intl Airport are American Airlines, Delta and United Airlines. Something to consider prior to booking your flight.

What is the cheapest day to fly round-trip from Colorado Springs to Washington, D.C. Dulles Intl Airport?

Tuesday is generally a great day to depart. Flying on this day could help you save up to 61%.

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 53 days early can save you up to 89% on average compared to booking a flight this week. If booking 53 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 $239 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 $366 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?

February is one of the best times of the year to fly to Washington, D.C. Dulles Intl Airport from Colorado Springs. Prices for February average $263 per person but you can even find prices for as low as $79. The most expensive prices can be found in the month of December. Opting for a February flight can save you 17% on your journey compared to booking in December

What is the cheapest time of day to fly from COS to IAD?

Unlike in the afternoon, when flights are generally more expensive, you can save up to 8% on flights from Colorado Springs to Washington, D.C. Dulles Intl Airport by exploring options for tickets at noon.

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 4 different airlines.

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.

$105+ Cheap Flights from Colorado Springs to Washington, D.C. Dulles Intl Airport

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Cheap flight deals from Colorado Springs to Dulles Intl

Round-trip from	$209 (United Airlines)
One-way from	$105 (United Airlines)
Popular in	October
Cheapest in	February
Average price	$316

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. 9% potential increase in price ($41 potential increase over avg. RT price).

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Cheapest flight prices on average. 3% potential price decrease ($13 potential savings vs. average RT price).

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Average for round-trip flights in August 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 août 14, 2025.

mer. 9/106:00 amCOS - IAD

1 stop6h 37mUnited Airlines

mer. 9/175:47 pmIAD - COS

1 stop6h 07mUnited Airlines

Deal found 8/14

$209

sam. 9/136:02 amCOS - IAD

1 stop8h 45mAmerican Airlines

mer. 9/175:40 pmIAD - COS

1 stop6h 28mAmerican Airlines

Deal found 8/13

$210

ven. 9/57:30 amCOS - IAD

1 stop6h 04mUnited Airlines

dim. 9/76:35 amIAD - COS

1 stop6h 21mUnited Airlines

Deal found 8/13

$211

mar. 9/96:02 amCOS - IAD

1 stop8h 48mAmerican Airlines

mar. 9/1611:18 amIAD - COS

2 stops12h 50mAmerican Airlines

Deal found 8/11

$214

jeu. 11/1312:36 pmCOS - IAD

2 stops9h 23mAmerican Airlines

lun. 11/176:04 amIAD - COS

1 stop7h 41mAmerican Airlines

Deal found 8/13

$216

jeu. 9/115:30 amCOS - IAD

1 stop5h 56mUnited Airlines

dim. 9/146:35 amIAD - COS

1 stop6h 21mUnited Airlines

Deal found 8/12

$228

lun. 9/225:55 pmCOS - IAD

2 stops13h 14mDelta

mer. 10/13:31 pmIAD - COS

1 stop7h 08mDelta

Deal found 8/13

$242

lun. 9/226:25 amCOS - IAD

1 stop7h 20mSouthwest

mer. 10/16:05 pmIAD - COS

1 stop5h 55mSouthwest

Deal found 8/13

$249

jeu. 9/256:02 amCOS - IAD

1 stop8h 48mAmerican Airlines

lun. 10/65:54 pmIAD - COS

1 stop7h 50mAmerican Airlines

Deal found 8/13

$250

mer. 9/106:02 amCOS - IAD

1 stop8h 48mAmerican Airlines

mer. 9/1711:18 amIAD - COS

2 stops12h 50mAmerican Airlines

Deal found 8/12

$253

jeu. 10/21:11 pmCOS - IAD

1 stop6h 28mDelta

dim. 10/56:00 amIAD - COS

1 stop8h 06mDelta

Deal found 8/12

$263

Best flights from Colorado Springs to Dulles Intl
Discover carefully curated flight deals from Colorado Springs to Dulles Intl that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated août 14, 2025.

mer. 9/105:30 amCOS - IAD

1 stop5h 56mUnited Airlines

mer. 9/173:55 pmIAD - COS

1 stop7h 59mUnited Airlines

Deal found 8/12

$209

mer. 9/106:02 amCOS - IAD

1 stop8h 48mAmerican Airlines

mer. 9/1711:47 amIAD - COS

1 stop6h 31mAmerican Airlines

Deal found 8/12

$209

jeu. 9/43:30 pmCOS - IAD

1 stop5h 20mSouthwest

mer. 9/106:05 pmIAD - COS

1 stop5h 55mSouthwest

Deal found 8/14

$210

mar. 9/96:00 amCOS - IAD

1 stop5h 49mUnited Airlines

mar. 9/165:10 pmIAD - COS

1 stop6h 44mUnited Airlines

Deal found 8/11

$209

mer. 12/106:13 amCOS - IAD

1 stop7h 53mAmerican Airlines

sam. 12/1311:30 amIAD - COS

1 stop8h 01mAmerican Airlines

Deal found 8/12

$210

ven. 11/75:30 amCOS - IAD

1 stop9h 40mSouthwest

lun. 11/105:05 amIAD - COS

1 stop8h 20mSouthwest

Deal found 8/14

$211

mer. 12/312:32 pmCOS - IAD

1 stop6h 52mUnited Airlines

dim. 12/75:15 pmIAD - COS

1 stop5h 45mUnited Airlines

Deal found 8/12

$210

sam. 9/136:02 amCOS - IAD

1 stop8h 45mAmerican Airlines

mer. 9/175:40 pmIAD - COS

1 stop6h 28mAmerican Airlines

Deal found 8/13

$210

jeu. 11/1311:05 amCOS - IAD

1 stop5h 55mSouthwest

lun. 11/175:45 pmIAD - COS

1 stop5h 45mSouthwest

Deal found 8/13

$211

ven. 9/512:50 pmCOS - IAD

1 stop6h 17mUnited Airlines

dim. 9/710:25 amIAD - COS

1 stop6h 20mUnited Airlines

Deal found 8/13

$211

Last-minute flights from Colorado Springs to Dulles Intl
Discover last-minute flight deals from Colorado Springs to Dulles Intl. Data last updated août 14, 2025 and is based on user searches.

mar. 8/196:00 amCOS - IAD

1 stop8h 30mDelta

mar. 8/266:15 amIAD - COS

1 stop6h 01mDelta

Deal found 8/12

$529

mar. 8/196:27 amCOS - IAD

2 stops14h 29mAmerican Airlines

mar. 8/267:44 amIAD - COS

2 stops12h 36mAmerican Airlines

Deal found 8/14

$595

jeu. 8/2111:35 amCOS - IAD

1 stop5h 38mUnited Airlines

ven. 8/226:35 amIAD - COS

1 stop6h 21mUnited Airlines

Deal found 8/14

$609

jeu. 8/218:00 amCOS - IAD

2 stops13h 40mDelta

dim. 8/243:26 pmIAD - COS

1 stop7h 15mDelta

Deal found 8/13

$614

jeu. 8/218:00 amCOS - IAD

2 stops14h 21mDelta

ven. 8/226:00 amIAD - COS

2 stops8h 12mDelta

Deal found 8/14

$619

ven. 9/57:30 amCOS - IAD

1 stop6h 04mUnited Airlines

dim. 9/76:35 amIAD - COS

1 stop6h 21mUnited Airlines

Deal found 8/13

$211

ven. 9/58:00 amCOS - IAD

2 stops13h 40mDelta

dim. 9/76:15 amIAD - COS

1 stop6h 01mDelta

Deal found 8/13

$268

mar. 9/96:02 amCOS - IAD

1 stop8h 48mAmerican Airlines

mar. 9/1611:18 amIAD - COS

2 stops12h 50mAmerican Airlines

Deal found 8/11

$214

mer. 9/106:00 amCOS - IAD

1 stop6h 37mUnited Airlines

mer. 9/175:47 pmIAD - COS

1 stop6h 07mUnited Airlines

Deal found 8/14

$209

mer. 9/106:02 amCOS - IAD

1 stop8h 48mAmerican Airlines

mer. 9/1711:18 amIAD - COS

2 stops12h 50mAmerican Airlines

Deal found 8/12

$253

jeu. 9/115:30 amCOS - IAD

1 stop5h 56mUnited Airlines

dim. 9/146:35 amIAD - COS

1 stop6h 21mUnited Airlines

Deal found 8/12

$228

sam. 9/136:02 amCOS - IAD

1 stop8h 45mAmerican Airlines

mer. 9/175:40 pmIAD - COS

1 stop6h 28mAmerican Airlines

Deal found 8/13

$210

One-way flights from Colorado Springs to Dulles Intl
Search for one-way flight options from Colorado Springs to Dulles Intl. Find affordable one-way fares based on user searches. Data last updated août 14, 2025.

mer. 9/246:00 amCOS - IAD

1 stop6h 37mUnited Airlines

Deal found 8/13

$105

lun. 10/2712:54 pmCOS - IAD

1 stop6h 27mUnited Airlines

Deal found 8/14

$106

jeu. 11/276:15 amCOS - IAD

1 stop7h 57mAmerican Airlines

Deal found 8/13

$107

mer. 10/2211:35 amCOS - IAD

1 stop9h 30mSouthwest

Deal found 8/12

$110

sam. 11/16:02 amCOS - IAD

2 stops11h 43mAmerican Airlines

Deal found 8/14

$111

jeu. 11/1312:36 pmCOS - IAD

2 stops9h 23mAmerican Airlines

Deal found 8/13

$112

mar. 10/141:16 pmCOS - IAD

1 stop8h 02mDelta

Deal found 8/12

$119

mer. 1/78:00 amCOS - IAD

2 stops13h 35mDelta

Deal found 8/14

$124

lun. 9/223:45 pmCOS - IAD

1 stop5h 32mUnited Airlines

Deal found 8/12

$128

mer. 12/248:50 pmCOS - IAD

1 stop6h 29mUnited Airlines

Deal found 8/12

$139

ven. 11/2811:35 amCOS - IAD

1 stop7h 46mUnited Airlines

Deal found 8/14

$140

Cheapflights Fare Finder

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

Colorado SpringsWashington, D.C.

COS - IAD

COSIAD

Colorado Springs

mer. 9/10

5:30 am-1:26 pm

1 stop5h 56m

Washington, D.C. Dulles Intl

mer. 9/17

3:55 pm-9:54 pm

1 stop7h 59m

$209

Colorado SpringsWashington, D.C.

COS - IAD

COSIAD

Colorado Springs

mer. 9/10

6:02 am-4:50 pm

1 stop8h 48m

Washington, D.C. Dulles Intl

mer. 9/17

11:47 am-4:18 pm

1 stop6h 31m

$209

Colorado SpringsWashington, D.C.

COS - IAD

COSIAD

Colorado Springs

mar. 9/9

6:00 am-1:49 pm

1 stop5h 49m

Washington, D.C. Dulles Intl

mar. 9/16

5:10 pm-9:54 pm

1 stop6h 44m

$209

Colorado SpringsWashington, D.C.

COS - IAD

COSIAD

Colorado Springs

jeu. 9/4

3:30 pm-10:50 pm

1 stop5h 20m

Washington, D.C. Dulles Intl

mer. 9/10

6:05 pm-10:00 pm

1 stop5h 55m

$210

Colorado SpringsWashington, D.C.

COS - IAD

COSIAD

Colorado Springs

mer. 12/10

6:13 am-4:06 pm

1 stop7h 53m

Washington, D.C. Dulles Intl

sam. 12/13

11:30 am-5:31 pm

1 stop8h 01m

$210

Colorado SpringsWashington, D.C.

COS - IAD

COSIAD

Colorado Springs

mer. 12/3

12:32 pm-9:24 pm

1 stop6h 52m

Washington, D.C. Dulles Intl

dim. 12/7

5:15 pm-9:00 pm

1 stop5h 45m

$210

Colorado SpringsWashington, D.C.

COS - IAD

COSIAD

Colorado Springs

sam. 9/13

6:02 am-4:47 pm

1 stop8h 45m

Washington, D.C. Dulles Intl

mer. 9/17

5:40 pm-10:08 pm

1 stop6h 28m

$210

Colorado SpringsWashington, D.C.

COS - IAD

COSIAD

Colorado Springs

ven. 11/7

5:30 am-5:10 pm

1 stop9h 40m

Washington, D.C. Dulles Intl

lun. 11/10

5:05 am-11:25 am

1 stop8h 20m

$211

Colorado SpringsWashington, D.C.

COS - IAD

COSIAD

Colorado Springs

jeu. 11/13

11:05 am-7:00 pm

1 stop5h 55m

Washington, D.C. Dulles Intl

lun. 11/17

5:45 pm-9:30 pm

1 stop5h 45m

$211

Colorado SpringsWashington, D.C.

COS - IAD

COSIAD

Colorado Springs

ven. 9/5

12:50 pm-9:07 pm

1 stop6h 17m

Washington, D.C. Dulles Intl

dim. 9/7

10:25 am-2:45 pm

1 stop6h 20m

$211

Flights are sorted by cheapest round-trip flights first.

Deals found on 8/11

Showing 1-10 of 18 results

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, July is the cheapest month in which you can book a flight from Colorado Springs to Washington, D.C. Dulles Intl Airport (average of $302). 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 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

4,244 reviews

Reviews

1 / 20

8.0

Excellent

Walter,Aug 2025

OAK - SAN

Dozens of flights and I've never seen a row's beverages forgotten. I even went back and asked the attendant to check on them and nothing. I really hope it didn't have something to do with the Black mother with her kid in the row. Otherwise it was a typical Southwest flight, rapid boarding, tolerable leg room.

Southwest

8.0

Very good

4,244 reviews

Southwest

8.0

Very good

4,244 reviews

Reviews

1 / 20

8.0

Excellent

Walter,Aug 2025

OAK - SAN

Delta

8.0

Very good

7,980 reviews

Southwest

8.0

Very good

4,244 reviews

Reviews

1 / 20

8.0

Excellent

Walter,Aug 2025

OAK - SAN

United Airlines

7.4

Good

8,916 reviews

Southwest

8.0

Very good

4,244 reviews

Reviews

1 / 20

8.0

Excellent

Walter,Aug 2025

OAK - SAN

American Airlines

7.2

Good

10,000 reviews

Southwest

8.0

Very good

4,244 reviews

Reviews

1 / 20

8.0

Excellent

Walter,Aug 2025

OAK - SAN

Related info for your journey

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 4 different airlines.
What are the cheapest airlines flying from Colorado Springs to Washington, D.C. Dulles Intl Airport round-trip?
American 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 United Airlines and Delta. American 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, July is the cheapest month in which you can book a flight from Colorado Springs to Washington, D.C. Dulles Intl Airport (average of $302). 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

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Alternative routes for Colorado Springs to Dulles Intl

Top 4 airlines flying from Colorado Springs to Dulles Intl

Airline	Cheapest	Average	Flexibility	On-time
American Airlines	Cheapest$228	Average$288	FlexibilityNo cancel fee	On-time71%
United Airlines	Cheapest$228	Average$377	FlexibilityNo cancel fee	On-time69%
Delta	Cheapest$236	Average$288	FlexibilityNo cancel fee	On-timeN/A
Southwest	Cheapest$281	Average$411	FlexibilityNo cancel fee	On-time63%

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$105+ 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 9/10. Fares are subject to change and may not be available on all flights or dates of travel.

Find cheap flights from Colorado Springs to Dulles Intl with Cheapflights

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Cheapest flights from Colorado Springs to Dulles IntlExplore 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 août 14, 2025.

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 août 14, 2025.

Cheapflights Fare Finder

Use the filters below to find and compare flights from Colorado Springs to Washington, D.C. Dulles Intl Airport that are best for you.

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.

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?

Reviews of airlines servicing Dulles Intl

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.

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?

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

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

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

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

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

Traveling to a place near Washington, D.C. Dulles Intl Airport?

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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.

Top 4 airlines flying from Colorado Springs to Dulles Intl

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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 août 14, 2025.