What is the cheapest airline that flies from Colorado to District of Columbia?

Frontier, United Airlines, and American Airlines are the most popular carriers operating from Colorado to District of Columbia

What airlines fly to District of Columbia?

Frontier, United Airlines and Southwest are the top three most popular airlines that fly to District of Columbia from Colorado according to our data. Frontier is the first choice among our users, with 46% of people opting to fly with this airline when traveling to District of Columbia. Keep in mind that there are 5 different airlines that fly to District of Columbia on a routine basis, so you have a few additional options to choose from.

How long is the flight from Colorado to District of Columbia?

On average, it takes 3h 10m to fly from Colorado to District of Columbia if you fly out of Denver (the most popular airport in Colorado) and into Washington, D.C. Dulles Intl Airport (the most popular airport in District of Columbia). If you’re flying out of Colorado Springs and into Washington, D.C. Dulles Intl Airport, then the flight time is around 5h 28m.

How many flights depart from Colorado to District of Columbia on average per day?

As of September 2025, 28 flights take off from Colorado and land in District of Columbia each day. The most common flight departure time for this route is 11:00AM, with 54% of daily flights taking off at noon.

How many flights depart from Colorado to District of Columbia on average per week?

The number of flights available between Colorado and District of Columbia is 196 per week as of September 2025. The most frequent departure day is Mon, with 16% of weekly flights leaving on this day.

When did momondo last update prices for flights from Colorado to District of Columbia?

Prices for flights from Colorado to District of Columbia refresh daily.

How many operators does momondo search for flights from Colorado to District of Columbia?

There are 5 operators available for flights from Colorado to District of Columbia as of September 2025.

How old do you have to be to fly from Colorado to District of Columbia?

The minimum age for a child to fly alone is five, but airlines that offer an unaccompanied minor (UNMR) service may have their own age limitations. Flight duration, scheduling, and layovers are among the considerations that may influence age limits. We recommend that you double-check with the airline you are booking with for travel from Colorado to District of Columbia.

What documentation or ID do you need to fly to District of Columbia?

The required travel and health documents for your District of Columbia trip may vary depending on your itinerary and personal circumstances. As a general rule, you should carry multiple documents, including a national ID card or driver's license and a passport valid for six months after your intended arrival at District of Columbia. We recommend that you seek guidance from your airline or a reliable third party such as IATA.

$78 Cheap Flights from Colorado to District of Columbia in 2025/26

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Find the cheapest flights from Colorado to District of Columbia

Round-trip

One-way

Last minute

Direct

Cheap round-trip flights

4:34 pm - 9:59 pmDEN-DCA

3h 25mnonstop

1:00 pm - 3:07 pmDCA-DEN

4h 07mnonstop

$131Frontier

Find Deal

vie., oct. 17 - sáb., oct. 18

6:45 am - 12:10 pmDEN-DCA

3h 25mnonstop

7:00 am - 9:08 amDCA-DEN

4h 08mnonstop

$133Frontier

Find Deal

vie., oct. 3 - mié., oct. 8

5:40 pm - 11:00 pmDEN-IAD

3h 20mnonstop

6:40 am - 8:30 amIAD-DEN

3h 50mnonstop

$177Southwest

Find Deal

sáb., oct. 18 - sáb., oct. 25

8:00 am - 1:18 pmDEN-IAD

3h 18mnonstop

2:25 pm - 4:31 pmIAD-DEN

4h 06mnonstop

$197United Airlines

Find Deal

mié., nov. 12 - jue., nov. 13

7:49 am - 4:49 pmDEN-IAD

7h 00m1 stop

2:16 pm - 10:22 pmIAD-DEN

10h 06m2 stops

$202American Airlines

Find Deal

mié., nov. 12 - mié., nov. 19

6:00 am - 4:15 pmDEN-IAD

8h 15m1 stop

6:40 am - 8:30 amIAD-DEN

3h 50mnonstop

$207Southwest

Find Deal

sáb., oct. 18 - sáb., oct. 25

12:30 pm - 8:55 pmCOS-DCA

6h 25m1 stop

2:51 pm - 9:38 pmDCA-COS

8h 47m1 stop

$237United Airlines

Find Deal

sáb., nov. 1 - mié., nov. 5

12:09 pm - 9:31 pmCOS-IAD

7h 22m1 stop

6:04 am - 11:48 amIAD-COS

7h 44m1 stop

$237American Airlines

Find Deal

sáb., nov. 1 - mié., nov. 5

1:16 pm - 11:41 pmCOS-DCA

8h 25m1 stop

6:00 am - 12:37 pmDCA-COS

8h 37m1 stop

$254Delta

Find Deal

vie., nov. 7 - mar., nov. 11

1:16 pm - 11:20 pmCOS-IAD

8h 04m1 stop

12:36 pm - 10:23 pmIAD-COS

11h 47m2 stops

$259Delta

Find Deal

vie., nov. 7 - mar., nov. 11

Southwest flights from Colorado to District of Columbia

Our best Southwest deals on Colorado to District of Columbia flight tickets

Southwest

Oct 18

DEN5:40 pmDenver Intl

3h 20m

IAD11:00 pmWashington, D.C. Dulles Intl

Oct 25

IAD6:40 amWashington, D.C. Dulles Intl

3h 50m

DEN8:30 amDenver Intl

$177

Find similar

Southwest

Oct 18

DEN6:00 amDenver Intl

8h 15m

1 stop

IAD4:15 pmWashington, D.C. Dulles Intl

Oct 25

IAD6:40 amWashington, D.C. Dulles Intl

3h 50m

DEN8:30 amDenver Intl

$207

Find similar

Southwest

Nov 3

COS6:35 amColorado Springs

8h 30m

1 stop

IAD5:05 pmWashington, D.C. Dulles Intl

Nov 6

IAD5:05 amWashington, D.C. Dulles Intl

8h 20m

1 stop

COS11:25 amColorado Springs

$290

Find similar

United Airlines flights from Colorado to District of Columbia

Our best United Airlines deals on Colorado to District of Columbia flight tickets

United Airlines

Nov 12

DEN8:00 amDenver Intl

3h 18m

IAD1:18 pmWashington, D.C. Dulles Intl

Nov 13

IAD2:25 pmWashington, D.C. Dulles Intl

4h 06m

DEN4:31 pmDenver Intl

$197

Find similar

United Airlines

Nov 1

COS12:30 pmColorado Springs

6h 25m

1 stop

DCA8:55 pmWashington, D.C. Reagan-National

Nov 5

DCA2:51 pmWashington, D.C. Reagan-National

8h 47m

1 stop

COS9:38 pmColorado Springs

$237

Find similar

United Airlines

Nov 7

COS11:35 amColorado Springs

7h 46m

1 stop

IAD9:21 pmWashington, D.C. Dulles Intl

Nov 11

IAD5:18 pmWashington, D.C. Dulles Intl

6h 46m

1 stop

COS10:04 pmColorado Springs

$254

Find similar

momondo Fare Finder

Use the filters below to find and compare flights from Colorado to District of Columbia that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

DenverWashington, D.C.

DEN - DCA

DENDCA

Denver Intl

vie. 10/17

4:34 pm-9:59 pm

Nonstop3h 25m

Washington, D.C. Reagan-National

sáb. 10/18

1:00 pm-3:07 pm

Nonstop4h 07m

$131

DenverWashington, D.C.

DEN - DCA

DENDCA

Denver Intl

vie. 10/3

6:45 am-12:10 pm

Nonstop3h 25m

Washington, D.C. Reagan-National

mié. 10/8

7:00 am-9:08 am

Nonstop4h 08m

$133

DenverWashington, D.C.

DEN - IAD

DENIAD

Denver Intl

sáb. 10/18

5:40 pm-11:00 pm

Nonstop3h 20m

Washington, D.C. Dulles Intl

sáb. 10/25

6:40 am-8:30 am

Nonstop3h 50m

$177

DenverWashington, D.C.

DEN - IAD

DENIAD

Denver Intl

mié. 11/12

8:00 am-1:18 pm

Nonstop3h 18m

Washington, D.C. Dulles Intl

jue. 11/13

2:25 pm-4:31 pm

Nonstop4h 06m

$197

DenverWashington, D.C.

DEN - IAD

DENIAD

Denver Intl

mié. 11/12

7:49 am-4:49 pm

1 stop7h 00m

Washington, D.C. Dulles Intl

mié. 11/19

2:16 pm-10:22 pm

2 stops10h 06m

$202

DenverWashington, D.C.

DEN - IAD

DENIAD

Denver Intl

sáb. 10/18

6:00 am-4:15 pm

1 stop8h 15m

Washington, D.C. Dulles Intl

sáb. 10/25

6:40 am-8:30 am

Nonstop3h 50m

$207

Colorado SpringsWashington, D.C.

COS - DCA

COSDCA

Colorado Springs

sáb. 11/1

12:30 pm-8:55 pm

1 stop6h 25m

Washington, D.C. Reagan-National

mié. 11/5

2:51 pm-9:38 pm

1 stop8h 47m

$237

Colorado SpringsWashington, D.C.

COS - IAD

COSIAD

Colorado Springs

sáb. 11/1

12:09 pm-9:31 pm

1 stop7h 22m

Washington, D.C. Dulles Intl

mié. 11/5

6:04 am-11:48 am

1 stop7h 44m

$237

Colorado SpringsWashington, D.C.

COS - DCA

COSDCA

Colorado Springs

vie. 11/7

1:16 pm-11:41 pm

1 stop8h 25m

Washington, D.C. Reagan-National

mar. 11/11

6:00 am-12:37 pm

1 stop8h 37m

$254

Colorado SpringsWashington, D.C.

COS - IAD

COSIAD

Colorado Springs

vie. 11/7

1:16 pm-11:20 pm

1 stop8h 04m

Washington, D.C. Dulles Intl

mar. 11/11

12:36 pm-10:23 pm

2 stops11h 47m

$259

Flights are sorted by cheapest round-trip flights first.

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How to get the cheapest flight ticket from Colorado to District of Columbia

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

Prices

Airlines

Other information

What is the cheapest month to fly to District of Columbia?

In general, August is the cheapest month to fly from Colorado to District of Columbia. Due to it being the ‘off-season’ during this time, you can expect flight prices to be around $231. If you don’t want to visit District of Columbia in August, then you should wait until February to fly from Colorado, when ticket prices are also cheap, with an average price of $237.

What is the cheapest day to depart on your flight to District of Columbia?

The cheapest day to depart on your flight to District of Columbia is on a Friday when prices can be found for as low as $326. This is often the case because there is less demand to fly during this day of the week. On the other hand, Sunday is the most expensive day to depart from Colorado because it is more convenient for both business and leisure travelers. As a result, prices tend to be around $409.

What is the cheapest time of day to depart on your flight to District of Columbia?

Flying to District of Columbia from Colorado in the morning is the least expensive time of day to depart. momondo users have found prices as low as $315 when looking at flights departing in the morning. Flights to District of Columbia are more costly at noon, with an average ticket price of $595. Departure times at noon fall within the peak daily travel times, which is why tickets can be more expensive.

What is the cheapest Colorado to District of Columbia flight route?

Fly from Denver Intl to Washington, D.C. Reagan-National for the best Colorado - District of Columbia flight prices

How far in advance should I book a flight to District of Columbia?

You are more likely to see cheaper flights to District of Columbia from Colorado when booking weeks ahead of your departure date. In general, you can expect to find flights to District of Columbia for around $336 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to District of Columbia from Colorado for as low as $302 on momondo.

What cabin class options are available on Colorado to District of Columbia flights?

There are 4 cabin classes available to choose from on Colorado to District of Columbia flights. Cabin price and availability will vary by airline so perform a search above to find the right deals for you.

Can stopping save me money on Colorado to District of Columbia flights?

No. A direct flight is the cheapest option for a flight between Colorado to District of Columbia.

Cheap Colorado to District of Columbia flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Colorado to District of Columbia

Best Price Found	$94
Fastest flight time	3h 10m
Direct flights	Every day
Airports in District of Columbia	2 airports

The best one-way flight to District of Columbia from Colorado in the past 72 hours is $94. The best round-trip flight deal from Colorado to District of Columbia found on momondo in the last 72 hours is $149.

The fastest flight from Colorado to District of Columbia takes 3h 10m

Direct flights go from Colorado to District of Columbia every day.

There are 2 airports near District of Columbia: Washington, D.C. Reagan-National (DCA), Washington, D.C. Dulles Intl (IAD)

Search flight deals

When did momondo last update prices for flights from Colorado to District of Columbia?
Prices for flights from Colorado to District of Columbia refresh daily.
How many operators does momondo search for flights from Colorado to District of Columbia?
There are 5 operators available for flights from Colorado to District of Columbia as of September 2025.
How old do you have to be to fly from Colorado to District of Columbia?
The minimum age for a child to fly alone is five, but airlines that offer an unaccompanied minor (UNMR) service may have their own age limitations. Flight duration, scheduling, and layovers are among the considerations that may influence age limits. We recommend that you double-check with the airline you are booking with for travel from Colorado to District of Columbia.
What documentation or ID do you need to fly to District of Columbia?
The required travel and health documents for your District of Columbia trip may vary depending on your itinerary and personal circumstances. As a general rule, you should carry multiple documents, including a national ID card or driver's license and a passport valid for six months after your intended arrival at District of Columbia. We recommend that you seek guidance from your airline or a reliable third party such as IATA.
What is the most popular plane model from Colorado to District of Columbia?
Based on momondo bookings for this flight route, the most popular plane model on flight routes from Colorado to District of Columbia is Airbus A320neo (15.33% of total bookings). The next most popular plane models are Boeing 737 MAX 8 (13.53%), Boeing 737-900 (12.64%), and Airbus A321neo (11.47%).

Best airlines flying from Colorado to District of Columbia

Compare and see reviews for airlines that fly from Colorado to District of Columbia with momondo

Airline	Rating	Free Cancellation	Price
Frontier	PriceFrom $100	Free Cancellation	Rating 5.8 3,171 reviews	Search Frontier flights
Delta	PriceFrom $138	Free Cancellation	Rating 7.9 7,964 reviews	Search Delta flights
American Airlines	PriceFrom $166	Free Cancellation	Rating 7.2 10,000 reviews	Search American Airlines flights
United Airlines	PriceFrom $173	Free Cancellation	Rating 7.4 8,926 reviews	Search United Airlines flights
Southwest	PriceFrom $177	Free Cancellation	Rating 8.0 4,242 reviews	Search Southwest flights

Why use momondo?

Why should I use momondo to find a flight deal from Colorado to District of Columbia?

momondo compares prices from hundreds of airlines and agents so you can find and book the best deal on flights from Colorado to District of Columbia. Millions of users trust and use momondo every year so you are in good hands.

Can I find flights from Colorado to District of Columbia with flexible booking policies on momondo?

Yes. All flights to District of Columbia from Colorado on momondo can be compared and filtered by various policies on offer, including flexible booking.

How can momondo help me find flights from Colorado to District of Columbia?

momondo provides multiple filters to help you find the best flight to District of Columbia from Colorado. Filter by price, airline, airports, cabin, aircraft, payment method, number of stops and more.

I’m not ready to book a flight from Colorado to District of Columbia right now. Can momondo alert me if prices change?

Yes momondo offers price alerts on flights to District of Columbia from Colorado. After performing a search on this page you should be able to see the price alert set up feature. Simply provide a valid email address and momondo will instantly alert you when prices change.

An easier way to manage your District of Columbia trip

We make it super easy to schedule, organize and travel with friends or family. Trips is free — and available to use no matter where you book.

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dom. 10/19

dom. 10/26

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Popular cities in District of Columbia

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Cheap flights from Colorado to District of Columbia from $78

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Colorado to District of Columbia departing on 12/9. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.

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Big names and deals

Filter for what you want

Filter for what you want

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Trusted and free

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Find the cheapest flights from Colorado to District of Columbia

Cheap round-trip flights

Cheap one-way flights

Cheap last minute flights

Cheap direct flights

Southwest flights from Colorado to District of Columbia

Our best Southwest deals on Colorado to District of Columbia flight tickets

United Airlines flights from Colorado to District of Columbia

Our best United Airlines deals on Colorado to District of Columbia flight tickets

momondo Fare Finder

Use the filters below to find and compare flights from Colorado to District of Columbia that are best for you.

See travel insights to District of Columbia from

How to get the cheapest flight ticket from Colorado to District of Columbia

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

What is the cheapest month to fly to District of Columbia?

What is the cheapest day to depart on your flight to District of Columbia?

What is the cheapest time of day to depart on your flight to District of Columbia?

What is the cheapest Colorado to District of Columbia flight route?

Fly from Denver Intl to Washington, D.C. Reagan-National for the best Colorado - District of Columbia flight prices

How far in advance should I book a flight to District of Columbia?

What cabin class options are available on Colorado to District of Columbia flights?

There are 4 cabin classes available to choose from on Colorado to District of Columbia flights. Cabin price and availability will vary by airline so perform a search above to find the right deals for you.

Can stopping save me money on Colorado to District of Columbia flights?

No. A direct flight is the cheapest option for a flight between Colorado to District of Columbia.

What is the cheapest airline that flies from Colorado to District of Columbia?

Frontier, United Airlines, and American Airlines are the most popular carriers operating from Colorado to District of Columbia

What airlines fly to District of Columbia?

How many flights depart from Colorado to District of Columbia on average per day?

As of September 2025, 28 flights take off from Colorado and land in District of Columbia each day. The most common flight departure time for this route is 11:00AM, with 54% of daily flights taking off at noon.

How many flights depart from Colorado to District of Columbia on average per week?

The number of flights available between Colorado and District of Columbia is 196 per week as of September 2025. The most frequent departure day is Mon, with 16% of weekly flights leaving on this day.

How long is the flight from Colorado to District of Columbia?

Cheap Colorado to District of Columbia flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Colorado to District of Columbia

Best Price Found

Fastest flight time

Direct flights

Airports in District of Columbia

When did momondo last update prices for flights from Colorado to District of Columbia?

How many operators does momondo search for flights from Colorado to District of Columbia?

How old do you have to be to fly from Colorado to District of Columbia?

What documentation or ID do you need to fly to District of Columbia?

What is the most popular plane model from Colorado to District of Columbia?

Best airlines flying from Colorado to District of Columbia

Compare and see reviews for airlines that fly from Colorado to District of Columbia with momondo

Why use momondo?

Why should I use momondo to find a flight deal from Colorado to District of Columbia?

Can I find flights from Colorado to District of Columbia with flexible booking policies on momondo?

How can momondo help me find flights from Colorado to District of Columbia?

I’m not ready to book a flight from Colorado to District of Columbia right now. Can momondo alert me if prices change?

An easier way to manage your District of Columbia trip

We make it super easy to schedule, organize and travel with friends or family. Trips is free — and available to use no matter where you book.

Get notified when prices go down

Daily price changes in your inbox - only with Price Alerts.

Find better results for your trip to District of Columbia

Popular cities in District of Columbia

Popular flights according to clicks in the last 7 days on momondo