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$69+ 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 6/1. Fares are subject to change and may not be available on all flights or dates of travel.
DEN — SEA
May 6 — May 131
Tue 5/6
Tue 5/13
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 May 1, 2025.

Most accurate provider

CheapOair
3 stars

Most trusted provider

CheapOair
3 stars

Round-trip from

$136
(Cheapflightsfares)

One-way from

$69
(Frontier)

Popular in

July

Cheapest in

October

Average price

$198

Good round-trip deal

$178 or less

Good one-way deal

$100 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 May 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 May 1, 2025.

This Frontier deal was found by Cheapflights users on 4/30. 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 6/610:29 pmDEN - SEA
Nonstop3h 05mFrontier
Tue 6/106:25 amSEA - DEN
Nonstop2h 47mFrontier
Deal found 4/30$136
This FlightHub deal was found by Cheapflights users on 4/30. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 5/139:43 pmDEN - PDX
Nonstop2h 44mFrontier
Wed 5/146:37 amPDX - DEN
Nonstop2h 38mFrontier
Deal found 4/30$140
This Orbitz deal was found by Cheapflights users on 5/1. 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 Orbitz is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 5/2111:40 amDEN - PDX
Nonstop2h 30mMultiple Airlines
Wed 5/286:35 amPDX - DEN
Nonstop2h 38mMultiple Airlines
Deal found 5/1$156
This Frontier deal was found by Cheapflights users on 4/30. 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 5/299:42 amDEN - GEG
Nonstop2h 22mFrontier
Thu 6/511:48 amGEG - DEN
Nonstop2h 21mFrontier
Deal found 4/30$157
This Hawaiian Airlines deal was found by Cheapflights users on 4/30. 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 Hawaiian Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 5/3111:40 amDEN - PDX
Nonstop2h 30mHawaiian Airlines
Sat 5/312:30 pmPDX - DEN
Nonstop2h 39mHawaiian Airlines
Deal found 4/30$171
This Expedia deal was found by Cheapflights users on 4/30. 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.
Tue 6/176:00 amDEN - GEG
1 stop7h 28mMultiple Airlines
Tue 6/2411:48 amGEG - DEN
Nonstop2h 21mMultiple Airlines
Deal found 4/30$172
This Alaska Airlines deal was found by Cheapflights users on 4/30. 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.
Sat 5/3111:40 amDEN - PDX
Nonstop2h 30mAlaska Airlines
Sat 5/314:00 pmPDX - DEN
1 stop7h 05mAlaska Airlines
Deal found 4/30$181
This Cheapflightsfares deal was found by Cheapflights users on 4/30. 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 4/30$190
This Orbitz deal was found by Cheapflights users on 4/29. 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 Orbitz is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/710:29 pmDEN - SEA
Nonstop3h 05mMultiple Airlines
Mon 8/115:25 amSEA - DEN
1 stop4h 12mMultiple Airlines
Deal found 4/29$192
This Southwest deal was found by Cheapflights users on 4/30. 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 5/288:20 amDEN - PDX
Nonstop2h 40mSouthwest
Thu 5/2912:20 pmPDX - DEN
2 stops7h 25mSouthwest
Deal found 4/30$202
This Delta deal was found by Cheapflights users on 4/29. 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.
Sat 8/97:40 pmDEN - SEA
Nonstop3h 07mDelta
Thu 8/212:54 pmSEA - DEN
Nonstop2h 55mDelta
Deal found 4/29$207
This Hawaiian Airlines deal was found by Cheapflights users on 4/29. 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 Hawaiian Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 8/16:00 amDEN - PSC
1 stop7h 36mHawaiian Airlines
Mon 8/43:46 pmPSC - DEN
1 stop7h 13mHawaiian Airlines
Deal found 4/29$208

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 May 1, 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

DenverSeattle

DEN - SEA

DENSEA

Denver Intl

Fri 6/6

10:29 pm-12:34 am

Nonstop3h 05m

Seattle/Tacoma Intl

Mon 6/9

6:25 am-10:12 am

Nonstop2h 47m

$136

DenverPortland

DEN - PDX

DENPDX

Denver Intl

Tue 5/13

9:43 pm-11:27 pm

Nonstop2h 44m

Portland

Wed 5/14

6:37 am-10:15 am

Nonstop2h 38m

$140

DenverPortland

DEN - PDX

DENPDX

Denver Intl

Wed 5/21

11:40 am-1:10 pm

Nonstop2h 30m

Portland

Wed 5/28

6:35 am-10:13 am

Nonstop2h 38m

$156

DenverSpokane

DEN - GEG

DENGEG

Denver Intl

Thu 5/29

9:42 am-11:04 am

Nonstop2h 22m

Spokane

Thu 6/5

11:48 am-3:09 pm

Nonstop2h 21m

$157

DenverPortland

DEN - PDX

DENPDX

Denver Intl

Sat 5/31

11:40 am-1:10 pm

Nonstop2h 30m

Portland

Sat 5/31

2:30 pm-6:09 pm

Nonstop2h 39m

$171

DenverSpokane

DEN - GEG

DENGEG

Denver Intl

Tue 6/17

6:00 am-12:28 pm

1 stop7h 28m

Spokane

Tue 6/24

11:48 am-3:09 pm

Nonstop2h 21m

$172

DenverPortland

DEN - PDX

DENPDX

Denver Intl

Sat 5/31

11:40 am-1:10 pm

Nonstop2h 30m

Portland

Sat 5/31

4:00 pm-12:05 am

1 stop7h 05m

$181

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

Tue 8/5

3:03 pm-5:00 pm

Nonstop2h 57m

Seattle/Tacoma Intl

Tue 8/5

8:17 pm-11:59 pm

Nonstop2h 42m

$191

DenverPortland

DEN - PDX

DENPDX

Denver Intl

Wed 5/28

8:20 am-10:00 am

Nonstop2h 40m

Portland

Thu 5/29

12:20 pm-8:45 pm

2 stops7h 25m

$202

Flights are sorted by cheapest round-trip flights first.

Deals found on 4/30

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 July is currently the most expensive (average of $405). 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 May 1, 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 May 1, 2025.

The most flights from USCO to USWA are scheduled on a Wednesday (43 on average). You will have fewer flight options on Saturday, which is when the least amount of flights are scheduled (18 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 May 1, 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
9,972 reviews

Crew

8.5

Entertainment

7.1

Food

7.1

Boarding

8.1

Comfort

7.9

Overall

8.0

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.
Alaska Airlines
8.0
Very good
9,972 reviews
Alaska Airlines
8.0
Very good
9,972 reviews

Crew

8.5

Entertainment

7.1

Food

7.1

Boarding

8.1

Comfort

7.9

Overall

8.0

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.
Southwest
8.0
Very good
4,294 reviews
Alaska Airlines
8.0
Very good
9,972 reviews

Crew

8.5

Entertainment

7.1

Food

7.1

Boarding

8.1

Comfort

7.9

Overall

8.0

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.
Delta
8.0
Very good
7,934 reviews
Alaska Airlines
8.0
Very good
9,972 reviews

Crew

8.5

Entertainment

7.1

Food

7.1

Boarding

8.1

Comfort

7.9

Overall

8.0

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.
Hawaiian Airlines
7.9
Good
2,408 reviews
Alaska Airlines
8.0
Very good
9,972 reviews

Crew

8.5

Entertainment

7.1

Food

7.1

Boarding

8.1

Comfort

7.9

Overall

8.0

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.
United Airlines
7.4
Good
8,696 reviews
Alaska Airlines
8.0
Very good
9,972 reviews

Crew

8.5

Entertainment

7.1

Food

7.1

Boarding

8.1

Comfort

7.9

Overall

8.0

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.

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 234 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?

    $69 is the cheapest one-way deal found within the past few days, from Frontier. You may also be able to find cheap deals on Hawaiian Airlines and Delta, with prices starting from $89 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 $405). 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 May 1, 2025.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$58Average$147FlexibilityNo cancel feeOn-time62%
Hawaiian AirlinesCheapest$108Average$345FlexibilityNo cancel feeOn-time85%
DeltaCheapest$109Average$358FlexibilityNo cancel feeOn-timeN/A
SouthwestCheapest$127Average$374FlexibilityNo cancel feeOn-time63%
United AirlinesCheapest$148Average$482FlexibilityNo cancel feeOn-time69%
Alaska AirlinesCheapest$150Average$412FlexibilityNo cancel feeOn-time75%
American AirlinesCheapest$199Average$415FlexibilityNo cancel feeOn-time71%

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