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Dulles Intl

$79+ 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 1/13. Fares are subject to change and may not be available on all flights or dates of travel.
DEN — IAD
Nov 25 — Dec 21
Mon 11/25
Mon 12/2
1 adult, Economy
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Cheap flight deals from Colorado to Dulles Intl

Discover tips and strategies to find the most affordable flight options for your journey from Colorado (USCO) to Dulles Intl (IAD). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated November 20, 2024.

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 20, 2024.

This Frontier deal was found by Cheapflights users on 11/20. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/195:10 amDEN - IAD
1 stop10h 48mFrontier
Mon 1/63:24 pmIAD - DEN
1 stop10h 10mFrontier
Deal found 11/20$128
This Southwest deal was found by Cheapflights users on 11/19. 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 12/189:45 amDEN - IAD
Nonstop3h 15mSouthwest
Sat 1/117:15 amIAD - DEN
Nonstop4h 05mSouthwest
Deal found 11/19$198
This United Airlines deal was found by Cheapflights users on 11/19. 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.
Tue 12/106:00 amDEN - IAD
Nonstop3h 19mUnited Airlines
Wed 12/1110:11 pmIAD - DEN
Nonstop4h 04mUnited Airlines
Deal found 11/19$217
This Delta deal was found by Cheapflights users on 11/20. 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.
Tue 12/1012:55 amDEN - IAD
1 stop5h 57mDelta
Sat 12/146:07 amIAD - DEN
1 stop9h 10mDelta
Deal found 11/20$236
This American Airlines deal was found by Cheapflights users on 11/19. 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 12/1111:59 pmDEN - IAD
1 stop6h 40mAmerican Airlines
Sat 12/145:28 pmIAD - DEN
1 stop7h 36mAmerican Airlines
Deal found 11/19$288
This Delta deal was found by Cheapflights users on 11/19. 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.
Wed 12/111:44 pmCOS - IAD
1 stop5h 51mDelta
Tue 12/176:00 amIAD - COS
1 stop8h 46mDelta
Deal found 11/19$288
This Booking.com deal was found by Cheapflights users on 11/19. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/255:28 pmDEN - IAD
1 stop16h 11mMultiple Airlines
Wed 11/279:11 amIAD - DEN
1 stop9h 05mMultiple Airlines
Deal found 11/19$292
This United Airlines deal was found by Cheapflights users on 11/19. 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.
Thu 12/196:00 amCOS - IAD
1 stop5h 28mUnited Airlines
Tue 12/244:05 pmIAD - COS
1 stop5h 54mUnited Airlines
Deal found 11/19$352
This American Airlines deal was found by Cheapflights users on 11/19. 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 12/1812:00 pmCOS - IAD
1 stop8h 24mAmerican Airlines
Fri 1/39:19 amIAD - COS
2 stops8h 35mAmerican Airlines
Deal found 11/19$358
This Delta deal was found by Cheapflights users on 11/19. 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.
Wed 12/252:25 pmEGE - IAD
1 stop8h 13mDelta
Sat 1/116:00 amIAD - EGE
1 stop6h 49mDelta
Deal found 11/19$364
This United Airlines deal was found by Cheapflights users on 11/19. 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 12/251:40 pmEGE - IAD
1 stop7h 45mUnited Airlines
Thu 1/210:05 amIAD - EGE
1 stop8h 39mUnited Airlines
Deal found 11/19$379
This American Airlines deal was found by Cheapflights users on 11/19. 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.
Tue 12/1012:30 pmMTJ - IAD
1 stop7h 54mAmerican Airlines
Mon 1/136:10 amIAD - MTJ
1 stop9h 55mAmerican Airlines
Deal found 11/19$379

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 2,629,791 searches. Data last updated November 20, 2024.

Fly from

Any airport

Fly to

Any airport

Route

Depart

Return

Price

DenverWashington, D.C.

DEN - IAD

DENIAD

Denver Intl

Thu 12/19

5:10 am-5:58 pm

1 stop10h 48m

Washington, D.C. Dulles Intl

Mon 1/6

3:24 pm-11:34 pm

1 stop10h 10m

$128

DenverWashington, D.C.

DEN - IAD

DENIAD

Denver Intl

Wed 1/15

7:45 am-4:13 pm

1 stop6h 28m

Washington, D.C. Dulles Intl

Wed 1/22

10:05 pm-11:59 pm

Nonstop3h 54m

$192

DenverWashington, D.C.

DEN - IAD

DENIAD

Denver Intl

Wed 12/18

9:45 am-3:00 pm

Nonstop3h 15m

Washington, D.C. Dulles Intl

Sat 1/11

7:15 am-9:20 am

Nonstop4h 05m

$198

DenverWashington, D.C.

DEN - IAD

DENIAD

Denver Intl

Mon 12/9

12:55 am-9:10 am

1 stop6h 15m

Washington, D.C. Dulles Intl

Sat 12/14

6:07 am-1:17 pm

1 stop9h 10m

$236

Colorado SpringsWashington, D.C.

COS - IAD

COSIAD

Colorado Springs

Wed 12/11

1:44 pm-9:35 pm

1 stop5h 51m

Washington, D.C. Dulles Intl

Tue 12/17

7:45 am-12:46 pm

1 stop7h 01m

$288

DenverWashington, D.C.

DEN - IAD

DENIAD

Denver Intl

Wed 12/11

7:00 am-7:28 pm

2 stops10h 28m

Washington, D.C. Dulles Intl

Mon 1/6

9:19 am-2:41 pm

1 stop7h 22m

$293

HaydenWashington, D.C.

HDN - IAD

HDNIAD

Hayden Yampa Valley

Sat 2/15

1:26 pm-10:34 pm

1 stop7h 08m

Washington, D.C. Dulles Intl

Sat 2/22

6:12 am-12:36 pm

1 stop8h 24m

$318

Grand JunctionWashington, D.C.

GJT - IAD

GJTIAD

Grand Junction Regnl

Thu 1/16

1:05 pm-11:36 pm

1 stop8h 31m

Washington, D.C. Dulles Intl

Sun 1/19

7:20 am-12:30 pm

1 stop7h 10m

$348

Colorado SpringsWashington, D.C.

COS - IAD

COSIAD

Colorado Springs

Thu 12/19

6:00 am-1:28 pm

1 stop5h 28m

Washington, D.C. Dulles Intl

Tue 12/24

4:05 pm-7:59 pm

1 stop5h 54m

$352

Colorado SpringsWashington, D.C.

COS - IAD

COSIAD

Colorado Springs

Tue 1/7

12:40 pm-10:41 pm

1 stop8h 01m

Washington, D.C. Dulles Intl

Tue 1/14

6:10 am-12:09 pm

1 stop7h 59m

$353

Flights are sorted by cheapest round-trip flights first.

Deals found on 11/20

Showing 1-10 of 51 results
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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, September is the cheapest month in which you can book a flight from Colorado to Washington, D.C. Dulles Intl Airport (average of $300). Flying from Colorado to Washington, D.C. Dulles Intl Airport in June is currently the most expensive (average of $376). 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 20, 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 20, 2024.

The most flights from USCO to IAD are scheduled on a Monday (24 on average). You will have fewer flight options on Saturday, which is when the least amount of flights are scheduled (13 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 20, 2024.
See what other customers who have flown with Frontier, Southwest 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
5,014 reviews

Comfort

8.1

Crew

8.7

Entertainment

7.7

Boarding

8.2

Food

7.2

Overall

8.1

Reviews

1 / 10

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

Southwest
8.1
Very good
5,014 reviews
Southwest
8.1
Very good
5,014 reviews

Comfort

8.1

Crew

8.7

Entertainment

7.7

Boarding

8.2

Food

7.2

Overall

8.1

Reviews

1 / 10

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

Alaska Airlines
8.0
Very good
9,461 reviews
Southwest
8.1
Very good
5,014 reviews

Comfort

8.1

Crew

8.7

Entertainment

7.7

Boarding

8.2

Food

7.2

Overall

8.1

Reviews

1 / 10

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

Delta
8.0
Very good
8,756 reviews
Southwest
8.1
Very good
5,014 reviews

Comfort

8.1

Crew

8.7

Entertainment

7.7

Boarding

8.2

Food

7.2

Overall

8.1

Reviews

1 / 10

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

United Airlines
7.4
Good
9,171 reviews
Southwest
8.1
Very good
5,014 reviews

Comfort

8.1

Crew

8.7

Entertainment

7.7

Boarding

8.2

Food

7.2

Overall

8.1

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
5,014 reviews

Comfort

8.1

Crew

8.7

Entertainment

7.7

Boarding

8.2

Food

7.2

Overall

8.1

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.

  • 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 ($79), United Airlines ($89), and Sun Country Air ($111).

  • 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 Vail Eagle County - Washington, D.C. Dulles Intl.

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

    Consider United Airlines (87%), Copa Airlines (86%) or Avianca (84%) 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 $118. While the most popular route (Denver Intl - Washington, D.C. Dulles Intl) can be booked for $177 on average our data indicates $930 when flying from Colorado to Washington, D.C. Dulles Intl Airport.

  • 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.

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

    Currently, September is the cheapest month in which you can book a flight from Colorado to Washington, D.C. Dulles Intl Airport (average of $300). Flying from Colorado to Washington, D.C. Dulles Intl Airport in June is currently the most expensive (average of $376). 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.

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Alternative routes for Colorado to Dulles Intl

See prices for flight routes from nearby airports that may be better suited for you.
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Miami to Reagan-National flights
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LaGuardia to Reagan-National flights
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Miami to Baltimore flights
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Newark to Reagan-National flights
Fort Lauderdale to Reagan-National flights
Minneapolis to Baltimore flights
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John F Kennedy Intl to Dulles Intl flights
George Bush Intcntl to Reagan-National flights
Detroit to Baltimore flights
John F Kennedy Intl to Reagan-National flights
Tampa to Reagan-National flights
Orlando to Baltimore 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 2,629,791 searches. Data last updated November 20, 2024.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$107Average$224FlexibilityNo cancel feeOn-time62%
DeltaCheapest$134Average$373FlexibilityNo cancel feeOn-timeN/A
United AirlinesCheapest$205Average$598FlexibilityNo cancel feeOn-time69%
SouthwestCheapest$218Average$330FlexibilityNo cancel feeOn-time63%
American AirlinesCheapest$227Average$482FlexibilityNo cancel feeOn-time71%
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