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$42+ Cheap flights from Colorado to Washington

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 10/27. Fares are subject to change and may not be available on all flights or dates of travel.
DEN — SEA
Oct 17 — Oct 241
Fri 10/17
Fri 10/24
1 adult, Economy
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Cheap flight deals from Colorado to Washington

Keep the following information in mind while searching for Colorado to Washington flight deals. Data was last updated September 17, 2025.

Round-trip from

$74
(Cheapflightsfares)

One-way from

$42
(Cheapflightsfares)

Popular in

June

Cheapest in

October

Average price

$197

Good round-trip deal

$99 or less

Good one-way deal

$98 or less
From Colorado to Washington
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One-way flight from Colorado to Washington
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Highest demand for flights based on searches. 14% potential increase in price ($34 potential increase over avg. RT price).
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Cheapest flight prices on average. 1% potential price decrease ($4 potential savings vs. average RT price).
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Average for round-trip flights in September 2025
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Price to beat on a round-trip flight from Colorado to Washington.
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Price to beat on a one-way flight from Colorado to Washington.
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Find flight deals from Colorado to Washington

Cheapest flights from Colorado to Washington
Explore the most affordable flight options available from Colorado to Washington. Find the lowest fares from popular airlines and budget airlines, with prices last updated on September 17, 2025.

This Cheapflightsfares deal was found by Cheapflights users on 9/15. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/109:48 amDEN - PAE
Nonstop2h 57mFrontier
Mon 10/1312:53 pmPAE - DEN
Nonstop2h 46mFrontier
Deal found 9/15$74
This Frontier deal was found by Cheapflights users on 9/15. 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.
Fri 10/179:48 amDEN - PAE
Nonstop2h 57mFrontier
Mon 10/2012:53 pmPAE - DEN
Nonstop2h 46mFrontier
Deal found 9/15$75
This Frontier deal was found by Cheapflights users on 9/15. 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 10/239:48 amDEN - GEG
Nonstop2h 20mFrontier
Sun 10/2611:53 amGEG - DEN
Nonstop2h 26mFrontier
Deal found 9/15$83
This Trip.com deal was found by Cheapflights users on 9/16. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/189:58 amDEN - PDX
Nonstop2h 50mFrontier
Tue 10/2812:52 pmPDX - DEN
Nonstop2h 43mFrontier
Deal found 9/16$95
This Cheapflightsfares deal was found by Cheapflights users on 9/14. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/159:58 amDEN - PDX
Nonstop2h 50mFrontier
Sat 10/1812:43 pmPDX - DEN
Nonstop2h 43mFrontier
Deal found 9/14$101
This Priceline deal was found by Cheapflights users on 9/16. 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 Priceline is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/410:05 amDEN - PDX
Nonstop2h 51mFrontier
Sat 11/812:52 pmPDX - DEN
Nonstop2h 43mFrontier
Deal found 9/16$102
This Cheapflightsfares deal was found by Cheapflights users on 9/17. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/36:30 amDEN - SEA
1 stop6h 11mFrontier
Wed 10/158:43 pmSEA - DEN
Nonstop2h 52mFrontier
Deal found 9/17$103
This Trip.com deal was found by Cheapflights users on 9/16. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/308:50 pmDEN - PDX
Nonstop2h 44mFrontier
Fri 10/311:14 amPDX - DEN
1 stop11h 02mFrontier
Deal found 9/16$103
This Priceline deal was found by Cheapflights users on 9/17. 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 Priceline is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/259:58 amDEN - SEA
Nonstop3h 09mFrontier
Mon 10/278:43 pmSEA - DEN
Nonstop2h 52mFrontier
Deal found 9/17$104
This Cheapflightsfares deal was found by Cheapflights users on 9/15. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/179:58 amDEN - PDX
Nonstop2h 50mFrontier
Tue 10/2112:43 pmPDX - DEN
Nonstop2h 43mFrontier
Deal found 9/15$105
This Cheapflightsfares deal was found by Cheapflights users on 9/15. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/135:30 amDEN - SEA
Nonstop3h 03mFrontier
Mon 10/208:43 pmSEA - DEN
Nonstop2h 52mFrontier
Deal found 9/15$106
This Cheapflightsfares deal was found by Cheapflights users on 9/15. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/1810:29 pmDEN - PDX
1 stop13h 22mFrontier
Tue 10/2112:43 pmPDX - DEN
Nonstop2h 43mFrontier
Deal found 9/15$106

Cheapflights Fare Finder

 
Customize your flight search to find flights from Colorado to Washington 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 2,558,603 searches. Data last updated September 17, 2025.
Use the filters below to find and compare flights from Colorado to Washington that are best for you.

Fly from

Colorado

Fly to

Washington

Route

Depart

Return

Price

DenverEverett

DEN - PAE

DENPAE

Denver Intl

Mon 10/20

9:48 am-11:45 am

Nonstop2h 57m

Everett Paine Field

Fri 10/24

12:53 pm-4:39 pm

Nonstop2h 46m

$74

DenverEverett

DEN - PAE

DENPAE

Denver Intl

Fri 10/17

9:48 am-11:45 am

Nonstop2h 57m

Everett Paine Field

Mon 10/20

12:53 pm-4:39 pm

Nonstop2h 46m

$74

DenverEverett

DEN - PAE

DENPAE

Denver Intl

Mon 10/27

9:48 am-11:45 am

Nonstop2h 57m

Everett Paine Field

Thu 10/30

5:41 pm-3:59 am

1 stop9h 18m

$109

DenverEverett

DEN - PAE

DENPAE

Denver Intl

Fri 11/14

9:48 am-11:58 am

Nonstop3h 10m

Everett Paine Field

Sun 11/16

5:41 pm-3:59 am

1 stop9h 18m

$109

DenverSeattle

DEN - SEA

DENSEA

Denver Intl

Tue 10/14

7:41 pm-9:45 pm

Nonstop3h 04m

Seattle/Tacoma Intl

Tue 10/21

7:35 am-11:28 am

Nonstop2h 53m

$133

DenverSeattle

DEN - SEA

DENSEA

Denver Intl

Fri 11/14

10:35 pm-12:35 am

Nonstop3h 00m

Seattle/Tacoma Intl

Sun 11/16

5:35 am-9:10 am

Nonstop2h 35m

$133

DenverSeattle

DEN - SEA

DENSEA

Denver Intl

Tue 11/11

7:51 pm-10:02 pm

Nonstop3h 11m

Seattle/Tacoma Intl

Sun 11/16

7:35 pm-11:22 pm

Nonstop2h 47m

$133

DenverSeattle

DEN - SEA

DENSEA

Denver Intl

Fri 10/17

6:25 am-8:31 am

Nonstop3h 06m

Seattle/Tacoma Intl

Tue 10/21

7:35 am-11:28 am

Nonstop2h 53m

$133

DenverSeattle

DEN - SEA

DENSEA

Denver Intl

Wed 10/15

12:25 pm-2:30 pm

Nonstop3h 05m

Seattle/Tacoma Intl

Wed 10/22

3:15 pm-6:56 pm

Nonstop2h 41m

$133

DenverSeattle

DEN - SEA

DENSEA

Denver Intl

Tue 11/18

12:18 pm-2:31 pm

Nonstop3h 13m

Seattle/Tacoma Intl

Tue 11/18

7:35 pm-11:22 pm

Nonstop2h 47m

$133

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/16

Showing 1-10 of 60 results
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Best time to book a flight from Colorado to Washington

Have a flexible travel schedule? Discover the best time to fly to Washington 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.

Cheapflights Insights

Everything you need to know about your flight from Colorado to Washington

What is the cheapest month to book a flight from Colorado to State of Washington?

Currently, January is the cheapest month in which you can book a flight from Colorado to State of Washington (average of $238). Flying from Colorado to State of Washington in June is currently the most expensive (average of $387). 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 WA?

Find hourly flight availability from Colorado to Washington. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated September 17, 2025.

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

Weekly flight availability from Colorado to State of Washington

Explore weekly flight availability from Colorado to Washington. 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 September 17, 2025.

The most flights from USCO to USWA are scheduled on a Wednesday (52 on average). You will have fewer flight options on Saturday, which is when the least amount of flights are scheduled (28 on average).

Reviews of airlines servicing Washington

Get insights into the airlines that provide service to Washington. 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 Washington. Reviews last updated September 17, 2025.
Peruse reviews from past customers who have flown with Alaska Airlines, Southwest, and Delta from Colorado to Washington to help guide your decision. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
Alaska Airlines
8.0
Very good
10,000 reviews

Comfort

7.8

Boarding

8.1

Food

7.1

Crew

8.5

Entertainment

7.1

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Anonymous,Aug 2025

MFR - SEA

Great smooth flight. Was hour and half late though. Don't know why
Alaska Airlines
8.0
Very good
10,000 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Comfort

7.8

Boarding

8.1

Food

7.1

Crew

8.5

Entertainment

7.1

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Anonymous,Aug 2025

MFR - SEA

Great smooth flight. Was hour and half late though. Don't know why
Southwest
8.0
Very good
4,242 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Comfort

7.8

Boarding

8.1

Food

7.1

Crew

8.5

Entertainment

7.1

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Anonymous,Aug 2025

MFR - SEA

Great smooth flight. Was hour and half late though. Don't know why
Delta
8.0
Very good
7,961 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Comfort

7.8

Boarding

8.1

Food

7.1

Crew

8.5

Entertainment

7.1

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Anonymous,Aug 2025

MFR - SEA

Great smooth flight. Was hour and half late though. Don't know why
United Airlines
7.4
Good
8,926 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Comfort

7.8

Boarding

8.1

Food

7.1

Crew

8.5

Entertainment

7.1

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Anonymous,Aug 2025

MFR - SEA

Great smooth flight. Was hour and half late though. Don't know why
Frontier
5.8
Fair
3,173 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Comfort

7.8

Boarding

8.1

Food

7.1

Crew

8.5

Entertainment

7.1

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Anonymous,Aug 2025

MFR - SEA

Great smooth flight. Was hour and half late though. Don't know why

Related info for your journey

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

  • How popular is this Colorado to State of Washington flight route?

    This flight path from Colorado to Washington was viewed by 185 users in the past month. Keep an eye out for changes in search interest prior to high and low season.

  • How long is the flight from Colorado to State of Washington?

    For as low as $74, Frontier can have you in State of Washington from Colorado in 2h 57m. There are 1034 mi between Colorado and State of Washington. Generally, flights for this route are nonstop.

  • What are the cheapest airlines to fly from Colorado to State of Washington one-way?

    $72 is the cheapest one-way deal found within the past few days, from United Airlines. You may also be able to find cheap deals on Southwest and Delta, with prices starting from $76 and $77, respectively.

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

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

  • How can I find direct flights from Colorado to Washington?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Colorado to Washington.

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

    Yes. Cheapflights offers flight deals from Colorado to Washington 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 State of Washington?

    Currently, January is the cheapest month in which you can book a flight from Colorado to State of Washington (average of $238). Flying from Colorado to State of Washington in June is currently the most expensive (average of $387). 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 Washington

See prices for flight routes from nearby airports that may be better suited for you.
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Top 7 airlines flying from Colorado to Washington

Discover the top 7 airlines that operate flights from Colorado to Washington. 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 2,558,603 searches. Data last updated September 17, 2025.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$66Average$168FlexibilityNo cancel feeOn-time62%
DeltaCheapest$104Average$330FlexibilityNo cancel feeOn-timeN/A
Hawaiian AirlinesCheapest$113Average$317FlexibilityNo cancel feeOn-time85%
SouthwestCheapest$136Average$359FlexibilityNo cancel feeOn-time63%
United AirlinesCheapest$150Average$455FlexibilityNo cancel feeOn-time69%
Alaska AirlinesCheapest$157Average$394FlexibilityNo cancel feeOn-time75%
American AirlinesCheapest$186Average$400FlexibilityNo cancel feeOn-time71%

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