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$56+ 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 5/20. Fares are subject to change and may not be available on all flights or dates of travel.
DEN — SEA
Apr 27 — May 41
Sun 4/27
Sun 5/4
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 April 22, 2025.

Most accurate provider

Mytrip
3 stars

Most trusted provider

Mytrip
3 stars

Round-trip from

$115
(Cheapflightsfares)

One-way from

$56
(Frontier)

Popular in

July

Cheapest in

October

Average price

$207

Good round-trip deal

$141 or less

Good one-way deal

$94 or less
Provider with most accurate pricing for Denver Intl-Seattle/Tacoma Intl flight deals.
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Provider most trusted by Cheapflights users for Denver Intl-Seattle/Tacoma Intl flights.
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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. 6% potential increase in price ($12 potential increase over avg. RT price).
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Cheapest flight prices on average. 1% potential price decrease ($3 potential savings vs. average RT price).
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Average for round-trip flights in April 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 April 22, 2025.

This Cheapflightsfares deal was found by Cheapflights users on 4/22. 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 5/1710:50 pmDEN - PDX
Nonstop2h 48mFrontier
Tue 5/206:20 amPDX - DEN
Nonstop2h 38mFrontier
Deal found 4/22$115
This Cheapflightsfares deal was found by Cheapflights users on 4/22. 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.
Tue 5/69:43 pmDEN - SEA
Nonstop3h 06mFrontier
Sun 5/1112:21 pmSEA - DEN
Nonstop2h 53mFrontier
Deal found 4/22$130
This Expedia deal was found by Cheapflights users on 4/21. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 5/216:00 amDEN - SEA
Nonstop2h 59mMultiple Airlines
Sat 5/246:25 amSEA - DEN
Nonstop2h 51mMultiple Airlines
Deal found 4/21$151
This Frontier deal was found by Cheapflights users on 4/21. 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 7/179:42 amDEN - GEG
Nonstop2h 21mFrontier
Tue 7/2911:48 amGEG - DEN
Nonstop2h 19mFrontier
Deal found 4/21$155
This Expedia deal was found by Cheapflights users on 4/22. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 5/149:43 pmDEN - PDX
Nonstop2h 44mMultiple Airlines
Sun 5/185:30 pmPDX - DEN
1 stop5h 35mMultiple Airlines
Deal found 4/22$169
This Alaska Airlines deal was found by Cheapflights users on 4/21. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 5/216:00 amDEN - SEA
Nonstop2h 59mAlaska Airlines
Sat 5/318:18 amSEA - DEN
Nonstop2h 42mAlaska Airlines
Deal found 4/21$177
This United Airlines deal was found by Cheapflights users on 4/22. 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 5/211:27 pmDEN - PDX
1 stop8h 26mUnited Airlines
Wed 5/288:45 amPDX - DEN
Nonstop2h 35mUnited Airlines
Deal found 4/22$187
This Cheapflightsfares deal was found by Cheapflights users on 4/22. 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 6/210:04 amDEN - PAE
Nonstop3h 06mFrontier
Fri 6/612:33 pmPAE - DEN
Nonstop2h 45mFrontier
Deal found 4/22$190
This Delta deal was found by Cheapflights users on 4/22. 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 6/187:40 pmDEN - SEA
Nonstop3h 10mDelta
Tue 6/247:10 amSEA - DEN
Nonstop2h 53mDelta
Deal found 4/22$197
This Delta deal was found by Cheapflights users on 4/22. 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 5/215:30 amDEN - PDX
1 stop4h 12mDelta
Wed 5/289:40 amPDX - DEN
1 stop4h 05mDelta
Deal found 4/22$197
This Alaska Airlines deal was found by Cheapflights users on 4/22. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 5/216:00 amDEN - PDX
1 stop4h 53mAlaska Airlines
Sun 5/255:30 pmPDX - DEN
1 stop5h 35mAlaska Airlines
Deal found 4/22$206
This Delta deal was found by Cheapflights users on 4/21. 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 6/56:45 pmDEN - GEG
1 stop6h 20mDelta
Tue 6/101:00 pmGEG - DEN
1 stop5h 53mDelta
Deal found 4/21$207

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 April 22, 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

DenverPortland

DEN - PDX

DENPDX

Denver Intl

Sat 5/17

10:50 pm-12:38 am

Nonstop2h 48m

Portland

Tue 5/20

6:20 am-9:58 am

Nonstop2h 38m

$115

DenverSeattle

DEN - SEA

DENSEA

Denver Intl

Wed 5/14

9:43 pm-11:49 pm

Nonstop3h 06m

Seattle/Tacoma Intl

Sun 5/18

6:05 am-9:56 am

Nonstop2h 51m

$130

DenverSeattle

DEN - SEA

DENSEA

Denver Intl

Wed 5/21

6:00 am-7:59 am

Nonstop2h 59m

Seattle/Tacoma Intl

Sat 5/24

6:25 am-10:16 am

Nonstop2h 51m

$151

DenverSpokane

DEN - GEG

DENGEG

Denver Intl

Thu 7/17

9:42 am-11:03 am

Nonstop2h 21m

Spokane

Tue 7/29

11:48 am-3:07 pm

Nonstop2h 19m

$155

DenverPortland

DEN - PDX

DENPDX

Denver Intl

Wed 5/14

9:43 pm-11:27 pm

Nonstop2h 44m

Portland

Sun 5/18

5:30 pm-12:05 am

1 stop5h 35m

$169

DenverSeattle

DEN - SEA

DENSEA

Denver Intl

Wed 5/21

6:00 am-7:59 am

Nonstop2h 59m

Seattle/Tacoma Intl

Sat 5/31

8:18 am-12:00 pm

Nonstop2h 42m

$177

DenverPortland

DEN - PDX

DENPDX

Denver Intl

Wed 5/21

1:27 pm-8:53 pm

1 stop8h 26m

Portland

Wed 5/28

8:45 am-12:20 pm

Nonstop2h 35m

$187

DenverEverett

DEN - PAE

DENPAE

Denver Intl

Mon 6/2

10:04 am-12:10 pm

Nonstop3h 06m

Everett Paine Field

Fri 6/6

12:33 pm-4:18 pm

Nonstop2h 45m

$190

DenverSeattle

DEN - SEA

DENSEA

Denver Intl

Wed 6/25

6:00 am-8:01 am

Nonstop3h 01m

Seattle/Tacoma Intl

Wed 6/25

8:17 pm-11:59 pm

Nonstop2h 42m

$191

DenverPortland

DEN - PDX

DENPDX

Denver Intl

Wed 5/14

7:00 am-1:50 pm

1 stop7h 50m

Portland

Wed 5/21

3:55 pm-10:35 pm

1 stop5h 40m

$196

Flights are sorted by cheapest round-trip flights first.

Deals found on 4/22

Showing 1-10 of 60 results
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6

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 July is currently the most expensive (average of $411). 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 April 22, 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 April 22, 2025.

The most flights from USCO to USWA are scheduled on a Tuesday (41 on average). You will have fewer flight options on Saturday, which is when the least amount of flights are scheduled (15 on average).

Rainfall in Washington by month

Plan your trip to Washington by taking into account the average rainfall totals by month.

In terms of precipitation, rainfall in State of Washington ranges from 0.7 - 6.6 inches per month. November is typically the wettest month, when rainfall can reach 6.6 in. July is typically the driest time to visit State of Washington when rainfall is around 0.7 in.

Temperature in Washington by month

Plan your trip to Washington by taking into account the average temperature totals by month.

If weather is an important factor for your trip to State of Washington, 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 66.2 F. Travelers looking to avoid the cold should look outside of December, when temperatures are typically at their lowest (around 41.0 F).

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 April 22, 2025.
See what other customers who have flown with Alaska Airlines, Southwest and Delta from Colorado to Washington have to say. You can also see how each airline stacks up in terms of entertainment options, comfort, food, crew/service, and boarding process.
Alaska Airlines
8.0
Very good
9,906 reviews

Crew

8.5

Boarding

8.2

Entertainment

7.1

Comfort

7.9

Food

7.1

Overall

8.0

Reviews

1 / 20
4.0
Okay

Anonymous,Apr 2025

LAS - STS

flight was delayed both ways even tho the weather was clear >
Alaska Airlines
8.0
Very good
9,906 reviews
Alaska Airlines
8.0
Very good
9,906 reviews

Crew

8.5

Boarding

8.2

Entertainment

7.1

Comfort

7.9

Food

7.1

Overall

8.0

Reviews

1 / 20
4.0
Okay

Anonymous,Apr 2025

LAS - STS

flight was delayed both ways even tho the weather was clear >
Southwest
8.0
Very good
4,286 reviews
Alaska Airlines
8.0
Very good
9,906 reviews

Crew

8.5

Boarding

8.2

Entertainment

7.1

Comfort

7.9

Food

7.1

Overall

8.0

Reviews

1 / 20
4.0
Okay

Anonymous,Apr 2025

LAS - STS

flight was delayed both ways even tho the weather was clear >
Delta
8.0
Very good
7,920 reviews
Alaska Airlines
8.0
Very good
9,906 reviews

Crew

8.5

Boarding

8.2

Entertainment

7.1

Comfort

7.9

Food

7.1

Overall

8.0

Reviews

1 / 20
4.0
Okay

Anonymous,Apr 2025

LAS - STS

flight was delayed both ways even tho the weather was clear >
Hawaiian Airlines
7.9
Good
2,392 reviews
Alaska Airlines
8.0
Very good
9,906 reviews

Crew

8.5

Boarding

8.2

Entertainment

7.1

Comfort

7.9

Food

7.1

Overall

8.0

Reviews

1 / 20
4.0
Okay

Anonymous,Apr 2025

LAS - STS

flight was delayed both ways even tho the weather was clear >
United Airlines
7.4
Good
8,683 reviews
Alaska Airlines
8.0
Very good
9,906 reviews

Crew

8.5

Boarding

8.2

Entertainment

7.1

Comfort

7.9

Food

7.1

Overall

8.0

Reviews

1 / 20
4.0
Okay

Anonymous,Apr 2025

LAS - STS

flight was delayed both ways even tho the weather was clear >

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 237 users in the past month. Keep an eye out for changes in search interest prior to high and low season.

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

    $56 is the cheapest one-way deal found within the past few days, from Frontier. You may also be able to find cheap deals on Southwest and Delta, with prices starting from $98 and $99, 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 July is currently the most expensive (average of $411). 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

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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 April 22, 2025.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$58Average$146FlexibilityNo cancel feeOn-time62%
Hawaiian AirlinesCheapest$108Average$246FlexibilityNo cancel feeOn-time85%
DeltaCheapest$108Average$363FlexibilityNo cancel feeOn-timeN/A
SouthwestCheapest$124Average$373FlexibilityNo cancel feeOn-time63%
United AirlinesCheapest$148Average$482FlexibilityNo cancel feeOn-time69%
Alaska AirlinesCheapest$148Average$418FlexibilityNo cancel feeOn-time75%
American AirlinesCheapest$199Average$419FlexibilityNo cancel feeOn-time71%

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