What is the cheapest airline that flies from Washington, D.C. Dulles Intl to Colorado?

United Airlines, Southwest, and American Airlines are the most popular carriers operating from Washington, D.C. Dulles Intl to Colorado

What airlines fly to Colorado?

United Airlines, Southwest and Frontier are the top three most popular airlines that fly to Colorado from Washington, D.C. Dulles Intl Airport according to our data. United Airlines is the first choice among our users, with 68% of people opting to fly with this airline when traveling to Colorado. Keep in mind that there are 6 different airlines that fly to Colorado on a routine basis, so you have a few additional options to choose from.

When did momondo last update prices for flights from Washington, D.C. Dulles Intl Airport to Colorado?

Prices for flights from Washington, D.C. Dulles Intl Airport to Colorado are refreshed on a daily basis.

How many operators does momondo search for flights from Washington, D.C. Dulles Intl Airport to Colorado?

The number of operators available for flights from Washington, D.C. Dulles Intl Airport to Colorado is 6 as of April 2026.

How old do you have to be to fly from Washington, D.C. Dulles Intl Airport to Colorado?

Although the minimum age for a child to fly alone is five, airlines that offer an unaccompanied minor (UMNR) service may have their own age limits, which could be impacted by factors such as flight length, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Washington, D.C. Dulles Intl Airport to Colorado.

What documentation or ID do you need to fly to Colorado?

The travel and health documents you'll need for your trip to Colorado may differ based on your itinerary and personal situation. Typically, you should have several documents on hand, such as a national ID card or driver's license and a passport that is valid for six months after your intended arrival at Colorado. It is always advisable to seek advice from your airline or a trusted third party, such as IATA.

$88 Cheap Flights from Washington, D.C. Dulles Intl Airport to Colorado in 2026

Q: How many flights depart from Washington, D.C. Dulles Intl Airport to Colorado on average per day?

As of April 2026, there are 22 flights per day flying from Washington, D.C. Dulles Intl Airport to Colorado. The most common time of day flights depart is 4:00PM, with 54% of flights taking off in the afternoon.

Q: How many flights depart from Washington, D.C. Dulles Intl Airport to Colorado on average per week?

As of April 2026, 160 flights take off from Washington, D.C. Dulles Intl Airport and land in Colorado each week. The most common flight departure day for this route is Fri, with 19% of weekly flights taking off on this day.

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Find the cheapest flights from Washington, D.C. Dulles Intl Airport to Colorado

Round-trip

One-way

Last minute

Direct

Cheap round-trip flights

Enter your travel dates to find the best prices.

7:45 am - 2:04 pm

IAD

DEN

8h 19m

1 stop

11:54 pm - 10:12 am

DEN

IAD

8h 18m

1 stop

$174Frontier

Fri, May 29 - Mon, Jun 1

3:59 pm - 10:39 pm

IAD

DEN

8h 40m

1 stop

11:54 pm - 10:12 am

DEN

IAD

8h 18m

1 stop

$178Frontier

Fri, May 8 - Mon, May 18

6:00 am - 12:17 pm

IAD

COS

8h 17m

1 stop

6:15 am - 4:31 pm

COS

IAD

8h 16m

1 stop

$335Delta

Tue, Apr 28 - Tue, May 5

3:00 pm - 10:13 pm

IAD

COS

9h 13m

2 stops

1:14 pm - 8:52 pm

COS

IAD

5h 38m

1 stop

$340Delta

Tue, Apr 28 - Tue, May 5

6:30 am - 11:19 am

IAD

MTJ

6h 49m

1 stop

1:40 pm - 11:32 pm

MTJ

IAD

7h 52m

1 stop

$344United Airlines

Tue, Jun 9 - Fri, Jun 12

4:30 pm - 12:05 am

IAD

COS

9h 35m

1 stop

4:05 pm - 11:40 pm

COS

IAD

5h 35m

1 stop

$351Southwest

Mon, May 4 - Wed, May 6

5:15 pm - 9:41 pm

IAD

ASE

6h 26m

1 stop

9:05 am - 5:37 pm

ASE

IAD

6h 32m

1 stop

$355United Airlines

Mon, Aug 31 - Thu, Sep 3

5:55 am - 9:20 am

IAD

COS

5h 25m

1 stop

9:10 am - 11:40 pm

COS

IAD

12h 30m

2 stops

$356Southwest

Thu, May 7 - Tue, May 12

6:24 am - 12:02 pm

IAD

DRO

7h 38m

1 stop

7:00 am - 5:54 pm

DRO

IAD

8h 54m

1 stop

$358American Airlines

Tue, Aug 11 - Sat, Sep 5

7:00 am - 12:12 pm

IAD

GJT

7h 12m

1 stop

11:46 am - 11:26 pm

GJT

IAD

9h 40m

2 stops

$364American Airlines

Tue, Apr 21 - Sat, Apr 25

Frontier flights from Washington, D.C. Dulles Intl Airport to Colorado

Our best Frontier deals on Washington, D.C. Dulles Intl Airport to Colorado flight tickets

Frontier

May 8

IAD3:59 pmWashington, D.C. Dulles Intl

8h 40m

1 stop

DEN10:39 pmDenver Intl

May 18

DEN11:54 pmDenver Intl

8h 18m

1 stop

IAD10:12 amWashington, D.C. Dulles Intl

$178

Frontier

Jun 1

IAD8:47 pmWashington, D.C. Dulles Intl

14h 18m

1 stop

DEN9:05 amDenver Intl

Jun 4

DEN7:40 amDenver Intl

25h 59m

1 stop

IAD11:39 amWashington, D.C. Dulles Intl

$179

Frontier

Apr 23

IAD6:10 amWashington, D.C. Dulles Intl

7h 59m

1 stop

DEN12:09 pmDenver Intl

Apr 27

DEN1:07 pmDenver Intl

9h 29m

1 stop

IAD12:36 amWashington, D.C. Dulles Intl

$180

Southwest flights from Washington, D.C. Dulles Intl Airport to Colorado

Our best Southwest deals on Washington, D.C. Dulles Intl Airport to Colorado flight tickets

Southwest

May 4

IAD4:30 pmWashington, D.C. Dulles Intl

9h 35m

1 stop

COS12:05 amColorado Springs

May 6

COS4:05 pmColorado Springs

5h 35m

1 stop

IAD11:40 pmWashington, D.C. Dulles Intl

$351

Southwest

May 7

IAD5:55 amWashington, D.C. Dulles Intl

5h 25m

1 stop

COS9:20 amColorado Springs

May 12

COS9:10 amColorado Springs

12h 30m

2 stops

IAD11:40 pmWashington, D.C. Dulles Intl

$356

Southwest

May 4

IAD5:55 amWashington, D.C. Dulles Intl

14h 50m

2 stops

COS6:45 pmColorado Springs

May 6

COS4:05 pmColorado Springs

5h 35m

1 stop

IAD11:40 pmWashington, D.C. Dulles Intl

$362

momondo Fare Finder

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

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

Washington, D.C.Denver

IAD - DEN

IADDEN

Washington, D.C. Dulles Intl

Fri 5/29

7:45 am-2:04 pm

1 stop8h 19m

Denver Intl

Mon 6/1

11:54 pm-10:12 am

1 stop8h 18m

$174

Washington, D.C.Denver

IAD - DEN

IADDEN

Washington, D.C. Dulles Intl

Fri 5/8

3:59 pm-10:39 pm

1 stop8h 40m

Denver Intl

Mon 5/18

11:54 pm-10:12 am

1 stop8h 18m

$178

Washington, D.C.Colorado Springs

IAD - COS

IADCOS

Washington, D.C. Dulles Intl

Tue 4/28

6:00 am-12:17 pm

1 stop8h 17m

Colorado Springs

Tue 5/5

6:15 am-4:31 pm

1 stop8h 16m

$335

Washington, D.C.Colorado Springs

IAD - COS

IADCOS

Washington, D.C. Dulles Intl

Tue 4/28

3:00 pm-10:13 pm

2 stops9h 13m

Colorado Springs

Tue 5/5

1:14 pm-8:52 pm

1 stop5h 38m

$340

Washington, D.C.Montrose

IAD - MTJ

IADMTJ

Washington, D.C. Dulles Intl

Tue 6/9

6:30 am-11:19 am

1 stop6h 49m

Montrose County

Fri 6/12

1:40 pm-11:32 pm

1 stop7h 52m

$344

Washington, D.C.Colorado Springs

IAD - COS

IADCOS

Washington, D.C. Dulles Intl

Mon 5/4

4:30 pm-12:05 am

1 stop9h 35m

Colorado Springs

Wed 5/6

4:05 pm-11:40 pm

1 stop5h 35m

$351

Quickest round-trip

Washington, D.C.Aspen

IAD - ASE

IADASE

Washington, D.C. Dulles Intl

Mon 8/31

5:15 pm-9:41 pm

1 stop6h 26m

Aspen Pitkin County

Thu 9/3

9:05 am-5:37 pm

1 stop6h 32m

$355

Washington, D.C.Colorado Springs

IAD - COS

IADCOS

Washington, D.C. Dulles Intl

Thu 5/7

5:55 am-9:20 am

1 stop5h 25m

Colorado Springs

Tue 5/12

9:10 am-11:40 pm

2 stops12h 30m

$356

Washington, D.C.Durango

IAD - DRO

IADDRO

Washington, D.C. Dulles Intl

Tue 8/11

6:24 am-12:02 pm

1 stop7h 38m

Durango La Plata County

Sat 9/5

7:00 am-5:54 pm

1 stop8h 54m

$358

Washington, D.C.Grand Junction

IAD - GJT

IADGJT

Washington, D.C. Dulles Intl

Tue 4/21

7:00 am-12:12 pm

1 stop7h 12m

Grand Junction Regnl

Sat 4/25

11:46 am-11:26 pm

2 stops9h 40m

$364

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first

How to get the cheapest flight ticket from Washington, D.C. Dulles Intl Airport to Colorado

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 Colorado?

The month of September is, on average, the cheapest month to fly to Colorado from Washington, D.C. Dulles Intl Airport, with most prices found around $278. The month of August is another great option to travel to Colorado, with average flight prices from Washington, D.C. Dulles Intl Airport averaging around $312.

What is the cheapest day to depart on your flight to Colorado?

The cheapest day to depart from Washington, D.C. Dulles Intl Airport to Colorado is on a Wednesday when prices can be found for as low as $399. On the other hand, Sunday is the most expensive day to depart from Washington, D.C. Dulles Intl Airport because it is more convenient for both business and leisure travelers. As a result, prices tend to be around $503.

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

The cheapest time of day to fly to Colorado is in the evening when flights can be purchased for as low as $376. In the morning is when there is more demand to fly to Colorado, so prices are often more expensive at around $464 per ticket.

What is the cheapest Washington, D.C. Dulles Intl to Colorado flight route?

Fly from Washington, D.C. Dulles Intl to Denver Intl for the best Washington, D.C. Dulles Intl - Colorado flight prices

How far in advance should I book a flight to Colorado?

You are more likely to see cheaper flights to Colorado from Washington, D.C. Dulles Intl Airport when booking weeks ahead of your departure date. In general, you can expect to find flights to Colorado for around $355 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Colorado from Washington, D.C. Dulles Intl Airport for as low as $279 on momondo.

What cabin class options are available on Washington, D.C. Dulles Intl to Colorado flights?

There are 4 cabin classes available to choose from on Washington, D.C. Dulles Intl to Colorado flights. Cabin price and availability will vary by airline so perform a search above to find the right deals for you.

Cheap Washington, D.C. Dulles Intl Airport to Colorado flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Washington, D.C. Dulles Intl Airport to Colorado

Best Price Found	$201
Fastest flight time	3h 45m
Direct flights	Every day
Airports in Colorado	87 airports

The best one-way flight to Colorado from Washington, D.C. Dulles Intl Airport in the past 72 hours is $201. The best round-trip flight deal from Washington, D.C. Dulles Intl Airport to Colorado found on momondo in the last 72 hours is $393.

The fastest flight from Washington, D.C. Dulles Intl Airport to Colorado takes 3h 45m

Direct flights go from Washington, D.C. Dulles Intl Airport to Colorado every day.

There are 87 airports in Colorado. From Washington, D.C. Dulles Intl Airport there are direct flights to Denver Intl (DEN).

Search flight deals

Frequently asked questions about flying from Washington, D.C. Dulles Intl Airport to Colorado

When did momondo last update prices for flights from Washington, D.C. Dulles Intl Airport to Colorado?
Prices for flights from Washington, D.C. Dulles Intl Airport to Colorado are refreshed on a daily basis.
How many operators does momondo search for flights from Washington, D.C. Dulles Intl Airport to Colorado?
The number of operators available for flights from Washington, D.C. Dulles Intl Airport to Colorado is 6 as of April 2026.
How old do you have to be to fly from Washington, D.C. Dulles Intl Airport to Colorado?
Although the minimum age for a child to fly alone is five, airlines that offer an unaccompanied minor (UMNR) service may have their own age limits, which could be impacted by factors such as flight length, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Washington, D.C. Dulles Intl Airport to Colorado.
What documentation or ID do you need to fly to Colorado?
The travel and health documents you'll need for your trip to Colorado may differ based on your itinerary and personal situation. Typically, you should have several documents on hand, such as a national ID card or driver's license and a passport that is valid for six months after your intended arrival at Colorado. It is always advisable to seek advice from your airline or a trusted third party, such as IATA.
What is the most popular plane model from Washington, D.C. Dulles Intl Airport to Colorado?
Based on momondo bookings for this flight route, the most popular plane model on flight routes from Washington, D.C. Dulles Intl Airport to Colorado is Boeing 737 MAX 8 (16.86% of total bookings). The next most popular plane models are Boeing 737-900 (16.34%), Airbus A321neo (14.55%), and Boeing 757-300 (10.89%).

Best airlines flying from Washington, D.C. Dulles Intl Airport to Colorado

Compare and see reviews for airlines that fly from Washington, D.C. Dulles Intl Airport to Colorado with momondo

Airline	Rating	Free Cancellation	Price
Frontier	PriceFrom $94	Free Cancellation	Rating 5.7 2,998 reviews	Search Frontier flights
American Airlines	PriceFrom $160	Free Cancellation	Rating 7.1 11,573 reviews	Search American Airlines flights
JetBlue	PriceFrom $161	Free Cancellation	Rating 7.2 2,928 reviews	Search JetBlue flights
Southwest	PriceFrom $177	Free Cancellation	Rating 8.0 4,335 reviews	Search Southwest flights
United Airlines	PriceFrom $210	Free Cancellation	Rating 7.4 9,570 reviews	Search United Airlines flights
Delta	PriceFrom $236	Free Cancellation	Rating 7.9 8,406 reviews	Search Delta flights

Why use momondo?

Why should I use momondo to find a flight deal from Washington, D.C. to Colorado?

It is quick and easy to find Washington, D.C. to Colorado flights on momondo. We search and return numerous flight options from various airlines and agents. You can then use our filters to narrow your search until you have found the most convenient flight to Colorado that suits you.

Can I find flights from Washington, D.C. to Colorado with flexible booking policies on momondo?

momondo does allow users to show only those flights to Colorado from Washington, D.C. which offer a flexible booking policy as well as other useful filters and features.

How can momondo help me find flights from Washington, D.C. to Colorado?

momondo offers useful filters to help you find the right flight. Choose specific flight times, airports or even what payment method you prefer. We have numerous options to help you book your ideal flight from Washington, D.C. to Colorado.

I’m not ready to book a flight from Washington, D.C. to Colorado right now. Can momondo alert me if prices change?

If you are not ready to book a flight from Washington, D.C. to Colorado now, use our insights above to find helpful tips or alternatively set up a price alert, where momondo will track prices on flights to Colorado and let you know when they change.

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Popular cities in Colorado

Flights to New Yorkfrom $55

Flights to Los Angelesfrom $53

Flights to Orlandofrom $48

Flights to Miamifrom $57

Flights to Chicagofrom $58

Flights to San Franciscofrom $84

Flights to Las Vegasfrom $45

Flights to Washington, D.C.from $56

Flights to Bostonfrom $69

Flights to Atlantafrom $48

Flights to Dallasfrom $59

Flights to Fort Lauderdalefrom $49

Cheap flights from Washington, D.C. Dulles Intl Airport to Colorado from $88

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Frontier flights from Washington, D.C. Dulles Intl Airport to Colorado

Our best Frontier deals on Washington, D.C. Dulles Intl Airport to Colorado flight tickets

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Our best Southwest deals on Washington, D.C. Dulles Intl Airport to Colorado flight tickets

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

See travel insights to Colorado from

How to get the cheapest flight ticket from Washington, D.C. Dulles Intl Airport to Colorado

What is the cheapest month to fly to Colorado?

What is the cheapest day to depart on your flight to Colorado?

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

What is the cheapest Washington, D.C. Dulles Intl to Colorado flight route?

How far in advance should I book a flight to Colorado?

What cabin class options are available on Washington, D.C. Dulles Intl to Colorado flights?

What is the cheapest airline that flies from Washington, D.C. Dulles Intl to Colorado?

What airlines fly to Colorado?

How many flights depart from Washington, D.C. Dulles Intl Airport to Colorado on average per day?

How many flights depart from Washington, D.C. Dulles Intl Airport to Colorado on average per week?

Cheap Washington, D.C. Dulles Intl Airport to Colorado flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Washington, D.C. Dulles Intl Airport to Colorado

Best Price Found

Fastest flight time

Direct flights

Airports in Colorado

Frequently asked questions about flying from Washington, D.C. Dulles Intl Airport to Colorado

Best airlines flying from Washington, D.C. Dulles Intl Airport to Colorado

Compare and see reviews for airlines that fly from Washington, D.C. Dulles Intl Airport to Colorado with momondo

Why use momondo?

An easier way to manage your Colorado 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 Colorado

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Washington, D.C. Dulles Intl Airport flight routes

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