HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
Dulles Intl

$53+ Cheap flights from Colorado 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 11/19. Fares are subject to change and may not be available on all flights or dates of travel.
DEN — IAD
Nov 10 — Nov 171
Sun 11/10
Sun 11/17
1 adult, Economy
We work with more than 300 partners to bring you better travel deals

Find cheap flights from Colorado 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.

Find flight deals from Colorado to Dulles Intl

Cheapest flights from Colorado to Dulles Intl
Explore the most affordable flight options available from Colorado to Dulles Intl. Find the lowest fares from popular airlines and budget airlines, with prices last updated on November 5, 2024.

This Mytrip deal was found by Cheapflights users on 11/4. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/1112:50 amDEN - IAD
1 stop14h 06mFrontier
Thu 12/193:02 pmIAD - DEN
1 stop28h 14mFrontier
Deal found 11/4$127
This United Airlines deal was found by Cheapflights users on 11/4. 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 12/46:00 amDEN - IAD
Nonstop3h 19mUnited Airlines
Wed 12/115:35 pmIAD - DEN
Nonstop4h 02mUnited Airlines
Deal found 11/4$177
This CheapOair deal was found by Cheapflights users on 11/5. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 11/163:45 pmDEN - IAD
1 stop16h 54mMultiple Airlines
Mon 11/183:15 pmIAD - DEN
1 stop8h 43mMultiple Airlines
Deal found 11/5$193
This Southwest deal was found by Cheapflights users on 11/4. 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.
Wed 12/45:45 pmDEN - IAD
Nonstop3h 15mSouthwest
Wed 12/117:25 amIAD - DEN
Nonstop3h 55mSouthwest
Deal found 11/4$198
This Sun Country Air deal was found by Cheapflights users on 11/5. 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 Sun Country Air is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 11/163:45 pmDEN - IAD
1 stop16h 54mSun Country Air
Sun 11/2411:47 amIAD - DEN
1 stop25h 11mSun Country Air
Deal found 11/5$235
This Delta deal was found by Cheapflights users on 11/5. 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.
Mon 12/912:55 amDEN - IAD
1 stop6h 15mDelta
Tue 12/175:35 pmIAD - DEN
1 stop6h 17mDelta
Deal found 11/5$236
This American Airlines deal was found by Cheapflights users on 11/4. 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.
Sun 12/811:59 pmDEN - IAD
1 stop6h 40mAmerican Airlines
Sat 12/145:01 pmIAD - DEN
1 stop6h 48mAmerican Airlines
Deal found 11/4$288
This Delta deal was found by Cheapflights users on 11/4. 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.
Thu 12/51:43 pmCOS - IAD
1 stop5h 52mDelta
Wed 12/117:45 amIAD - COS
1 stop7h 01mDelta
Deal found 11/4$288
This American Airlines deal was found by Cheapflights users on 11/4. 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 12/186:00 amCOS - IAD
1 stop8h 11mAmerican Airlines
Tue 1/76:10 amIAD - COS
1 stop7h 59mAmerican Airlines
Deal found 11/4$353
This United deal was found by Cheapflights users on 11/4. 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 is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/191:20 pmCOS - IAD
1 stop8h 05mUnited Airlines
Fri 1/35:35 pmIAD - COS
1 stop8h 17mUnited Airlines
Deal found 11/4$368
This United Airlines deal was found by Cheapflights users on 11/5. 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.
Sat 11/163:22 pmEGE - IAD
2 stops13h 58mUnited Airlines
Sun 11/1710:05 amIAD - EGE
1 stop6h 24mUnited Airlines
Deal found 11/5$377
This Southwest deal was found by Cheapflights users on 11/4. 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.
Fri 12/136:00 amCOS - IAD
1 stop7h 15mSouthwest
Thu 12/194:00 pmIAD - COS
1 stop8h 15mSouthwest
Deal found 11/4$408

Find flights from Colorado to Dulles Intl within your budget

Customize your flight search to find flights from Colorado 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 2,554,862 searches. Data last updated November 5, 2024.

Fly from

Any airport

Fly to

Any airport

Route

Depart

Return

Price

DenverWashington, D.C.

DEN - IAD

DENIAD

Denver Intl

Mon 11/25

11:20 pm-7:58 am

1 stop6h 38m

$73

DenverWashington, D.C.

DEN - IAD

DENIAD

Denver Intl

Sat 12/7

6:00 am-11:19 am

Nonstop3h 19m

$89

DenverWashington, D.C.

DEN - IAD

DENIAD

Denver Intl

Thu 12/5

9:45 am-3:00 pm

Nonstop3h 15m

$109

DenverWashington, D.C.

DEN - IAD

DENIAD

Denver Intl

Tue 11/26

6:28 pm-11:52 am

1 stop15h 24m

$130

Colorado SpringsWashington, D.C.

COS - IAD

COSIAD

Colorado Springs

Tue 12/3

1:43 pm-12:06 am

1 stop8h 23m

$144

DenverWashington, D.C.

DEN - IAD

DENIAD

Denver Intl

Wed 12/4

7:20 am-7:31 pm

2 stops10h 11m

$149

DenverWashington, D.C.

DEN - IAD

DENIAD

Denver Intl

Sun 2/2

6:29 pm-7:05 pm

2 stops22h 36m

$152

DenverWashington, D.C.

DEN - IAD

DENIAD

Denver Intl

Tue 12/10

4:56 pm-4:10 pm

2 stops21h 14m

$192

DenverWashington, D.C.

DEN - IAD

DENIAD

Denver Intl

Mon 11/18

12:55 am-9:01 am

1 stop6h 06m

$148

Colorado SpringsWashington, D.C.

COS - IAD

COSIAD

Colorado Springs

Sat 11/23

3:25 pm-11:18 pm

1 stop5h 53m

$157

Flights are sorted by cheapest first

Deals found on 11/4

Showing 1-10 of 56 results
1
2
3
...
6

Best time to book a flight from Colorado to Dulles Intl

Have a flexible travel schedule? Discover the best time to fly to Dulles Intl from Colorado 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 to Dulles Intl

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

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

Currently, December is the cheapest month in which you can book a flight from Colorado to Washington, D.C. Dulles Intl Airport (average of $298). Flying from Colorado to Washington, D.C. Dulles Intl Airport in June is currently the most expensive (average of $377). 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.

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

Find hourly flight availability from Colorado to Dulles Intl. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated November 5, 2024.

Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from Colorado to Washington, D.C. Dulles Intl Airport as you normally would.

Weekly flight availability from Colorado to Washington, D.C. Dulles Intl Airport

Explore weekly flight availability from Colorado to Dulles Intl. Discover flights operating on different days of the week, giving you the flexibility to choose a travel day that best fits your plans. Compare info to find the most convenient option for your journey. Data last updated November 5, 2024.

The most flights from USCO to IAD are scheduled on a Monday (22 on average). You will have fewer flight options on Saturday, which is when the least amount of flights are scheduled (17 on average).

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 November 5, 2024.
See what other customers who have flown with Frontier, United Airlines and American Airlines from Colorado to Washington, D.C. have to say. Users can see the overall rating for each airline as well as how each is rated in terms of entertainment options, comfort, food, crew/service, and boarding process.
Southwest
8.1
Very good
5,082 reviews

Food

7.2

Crew

8.7

Comfort

8.1

Entertainment

7.7

Overall

8.1

Boarding

8.3

Reviews

1 / 10

Great service throughout our flight. Easy boarding with early bird check in

Southwest
8.1
Very good
5,082 reviews
Southwest
8.1
Very good
5,082 reviews

Food

7.2

Crew

8.7

Comfort

8.1

Entertainment

7.7

Overall

8.1

Boarding

8.3

Reviews

1 / 10

Great service throughout our flight. Easy boarding with early bird check in

Alaska Airlines
8.0
Very good
9,421 reviews
Southwest
8.1
Very good
5,082 reviews

Food

7.2

Crew

8.7

Comfort

8.1

Entertainment

7.7

Overall

8.1

Boarding

8.3

Reviews

1 / 10

Great service throughout our flight. Easy boarding with early bird check in

Delta
8.0
Very good
8,830 reviews
Southwest
8.1
Very good
5,082 reviews

Food

7.2

Crew

8.7

Comfort

8.1

Entertainment

7.7

Overall

8.1

Boarding

8.3

Reviews

1 / 10

Great service throughout our flight. Easy boarding with early bird check in

United Airlines
7.4
Good
9,215 reviews
Southwest
8.1
Very good
5,082 reviews

Food

7.2

Crew

8.7

Comfort

8.1

Entertainment

7.7

Overall

8.1

Boarding

8.3

Reviews

1 / 10

Great service throughout our flight. Easy boarding with early bird check in

American Airlines
7.2
Good
10,000 reviews
Southwest
8.1
Very good
5,082 reviews

Food

7.2

Crew

8.7

Comfort

8.1

Entertainment

7.7

Overall

8.1

Boarding

8.3

Reviews

1 / 10

Great service throughout our flight. Easy boarding with early bird check in

Related info for your journey

Find useful and relevant information for your journey from Colorado to Dulles Intl. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • Can I find flights from Colorado to Washington, D.C. Dulles Intl Airport for under $200 on Cheapflights?

    Yes, there are multiple flights from Colorado to Washington, D.C. Dulles Intl Airport for under $200. The cheapest flight booked recently is on Frontier for just $105, but on average you can expect to pay $335.

  • Are there nonstop flights from Colorado to Washington, D.C. Dulles Intl Airport for under $200 on Cheapflights?

    Cheapflights has at least 2 direct flights from Colorado to Washington, D.C. Dulles Intl Airport under $200. A good price for a nonstop flight from Colorado to Washington, D.C. Dulles Intl Airport is less than $187.

  • Are there last-minute flights available from Colorado to Washington, D.C. Dulles Intl Airport for under $200?

    There are currently 19+ open flights from Colorado to Washington, D.C. Dulles Intl Airport within the next 7 days for less than $200.

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

    The cheapest airlines for a one-way flight from Colorado to Washington, D.C. Dulles Intl Airport are Frontier ($53), United Airlines ($89), and Southwest ($109).

  • What are the most popular routes from Colorado to Washington, D.C. Dulles Intl Airport?

    The most popular route from Colorado to Washington, D.C. Dulles Intl Airport is Denver Intl - Washington, D.C. Dulles Intl. You may also consider Colorado Springs - Washington, D.C. Dulles Intl or Durango La Plata County - Washington, D.C. Dulles Intl.

  • What are the most reliable airlines from Colorado to Washington, D.C. Dulles Intl Airport?

    Consider Avianca (90%), Copa Airlines (89%) or United Airlines (88%) when booking your flight. These represent the most reliable airlines when flying from Colorado to Washington, D.C. Dulles Intl Airport.

  • What are the cheapest flights from Colorado to Washington, D.C. Dulles Intl Airport?

    Looking at all options, your cheapest flight can be booked for $89. While the most popular route (Denver Intl - Washington, D.C. Dulles Intl) can be booked for $171 on average our data indicates $826 when flying from Colorado to Washington, D.C. Dulles Intl Airport.

  • What does DEN to IAD mean?

    These are just IATA (International Air Transport Association) codes. They are used in aviation to identify and differentiate airports. That’s why a Denver Intl Airport to Washington, D.C. Dulles Intl Airport flight would often be abbreviated as a DEN to IAD flight. Ready for more IATA code knowledge? These are related airports for your current travel destination: Colorado Springs Airport (COS), Aspen Pitkin County Airport (ASE), Grand Junction Regnl Airport (GJT), Vail Eagle County Airport (EGE), Montrose County Airport (MTJ).

  • Can I find deals for flights from Colorado to Dulles Intl that include extra baggage allowance?

    The amount of baggage you can bring on your Colorado to Dulles Intl flight depends on the airline and the type of fare you've chosen. After entering your flight details, you'll be able to view the specific baggage policies for each deal in the search results. Keep in mind that certain deals may offer additional baggage allowance.

  • Can I find deals on flights from Colorado to Dulles Intl with specific airlines?

    Yes, Cheapflights allows you to browse and filter Colorado to Dulles Intl flight deals by airline. After entering your origin and destination, use the available filters to view flights offered by airlines.

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

    Yes. In addition to deals on Colorado to Dulles Intl flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Colorado 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 to Dulles Intl.

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

    Yes. Cheapflights offers flight deals from Colorado 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.

  • Can I find deals for flights from Colorado to Dulles Intl that allow pets onboard?

    Many airlines flying from Colorado to Dulles Intl offer the option to travel with pets. After selecting a flight deal, you can find more information about the airline's pet policy on their official website or by contacting the airline directly. Please note that additional fees and restrictions may apply.

  • Can I find deals on last-minute flights from Colorado to Dulles Intl?

    Yes, you can often find last-minute deals on Colorado to Dulles Intl flights on Cheapflights. However, these deals can vary and may not always be available. We recommend checking back frequently or signing up for price alerts for the most up-to-date deals.

  • How recently were the Colorado to Washington, D.C. Dulles Intl Airport flight deals updated?

    The Colorado to Washington, D.C. Dulles Intl Airport flight deals you see on this page were last updated on 11/5.

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

    Currently, December is the cheapest month in which you can book a flight from Colorado to Washington, D.C. Dulles Intl Airport (average of $298). Flying from Colorado to Washington, D.C. Dulles Intl Airport in June is currently the most expensive (average of $377). 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 to Dulles Intl

See prices for flight routes from nearby airports that may be better suited for you.
Dallas/Fort Worth to Dulles Intl flights
Dallas/Fort Worth to Baltimore flights
Los Angeles to Dulles Intl flights
Los Angeles to Reagan-National flights
Los Angeles to Baltimore flights
Seattle to Dulles Intl flights
Atlanta to Dulles Intl flights
San Francisco to Dulles Intl flights
Dallas/Fort Worth to Reagan-National flights
San Francisco to Reagan-National flights
Atlanta to Reagan-National flights
Boston to Dulles Intl flights
O'Hare Intl to Dulles Intl flights
Boston to Reagan-National flights
Boston to Baltimore flights
O'Hare Intl to Baltimore flights
Seattle to Reagan-National flights
Orlando to Reagan-National flights
San Francisco to Baltimore flights
O'Hare Intl to Reagan-National flights
Orlando to Dulles Intl flights
Hobby to Baltimore flights
Hobby to Dulles Intl flights
Seattle to Baltimore flights
Atlanta to Baltimore flights
George Bush Intcntl to Dulles Intl flights
Denver to Dulles Intl flights
Denver to Reagan-National flights
Fort Lauderdale to Baltimore flights
Detroit to Reagan-National flights
Denver to Baltimore flights
Hobby to Reagan-National flights
Newark to Dulles Intl flights
Minneapolis to Reagan-National flights
George Bush Intcntl to Baltimore flights
San Diego to Dulles Intl flights
Orlando to Baltimore flights
John F Kennedy Intl to Reagan-National flights
Miami to Dulles Intl flights
LaGuardia to Reagan-National flights
Miami to Reagan-National flights
Austin to Dulles Intl flights
Minneapolis to Baltimore flights
Tampa to Dulles Intl flights
Detroit to Baltimore flights
George Bush Intcntl to Reagan-National flights
Tampa to Reagan-National flights
Sky Harbor Intl to Dulles Intl flights
Tampa to Baltimore flights
Midway to Dulles Intl flights

Top 5 airlines flying from Colorado to Dulles Intl

Discover the top 5 airlines that operate flights from Colorado 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 2,554,862 searches. Data last updated November 5, 2024.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$103Average$246FlexibilityNo cancel feeOn-time62%
DeltaCheapest$134Average$314FlexibilityNo cancel feeOn-timeN/A
United AirlinesCheapest$215Average$516FlexibilityNo cancel feeOn-time69%
SouthwestCheapest$218Average$323FlexibilityNo cancel feeOn-time63%
American AirlinesCheapest$227Average$449FlexibilityNo cancel feeOn-time71%
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.
View all available airlines