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$59+ Cheap flights from Washington to Colorado

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 8/5. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — DEN
jul. 23 — jul. 301
mié. 7/23
mié. 7/30
1 adult, Economy
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Cheap flight deals from Washington to Colorado

Keep the following information in mind while searching for Washington to Colorado flight deals. Data was last updated julio 18, 2025.

Round-trip from

$109
(Frontier)

One-way from

$59
(Priceline)

Popular in

December

Cheapest in

October

Average price

$213

Good round-trip deal

$141 or less

Good one-way deal

$132 or less
From Washington to Colorado
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One-way flight from Washington to Colorado
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High demand for flights, 0% potential price rise
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Cheapest flight prices on average. 2% potential price decrease ($5 potential savings vs. average RT price).
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Average for round-trip flights in July 2025
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Price to beat on a round-trip flight from Washington to Colorado.
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Price to beat on a one-way flight from Washington to Colorado.
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Find flight deals from Washington to Colorado

Cheapest flights from Washington to Colorado
Explore the most affordable flight options available from Washington to Colorado. Find the lowest fares from popular airlines and budget airlines, with prices last updated on julio 18, 2025.

This Frontier deal was found by Cheapflights users on 7/17. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
vie. 8/2912:34 pmPAE - DEN
Nonstop2h 45mFrontier
lun. 9/19:36 amDEN - PAE
Nonstop3h 03mFrontier
Deal found 7/17$109
This Cheapflightsfares deal was found by Cheapflights users on 7/17. 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.
mié. 8/276:51 amPDX - DEN
Nonstop2h 39mFrontier
mié. 9/38:50 pmDEN - PDX
Nonstop2h 49mFrontier
Deal found 7/17$112
This Frontier deal was found by Cheapflights users on 7/17. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
vie. 9/511:53 amGEG - DEN
Nonstop2h 19mFrontier
dom. 9/79:38 amDEN - GEG
Nonstop2h 20mFrontier
Deal found 7/17$118
This SmartFares deal was found by Cheapflights users on 7/16. 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 SmartFares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
jue. 8/146:25 amSEA - DEN
Nonstop2h 49mFrontier
lun. 8/184:57 pmDEN - SEA
Nonstop3h 02mFrontier
Deal found 7/16$135
This KAYAK deal was found by Cheapflights users on 7/16. 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 KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
sáb. 10/255:59 pmSEA - DEN
Nonstop2h 47mHawaiian Airlines
mar. 10/288:02 pmDEN - SEA
Nonstop3h 11mHawaiian Airlines
Deal found 7/16$145
This Alaska Airlines deal was found by Cheapflights users on 7/16. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
lun. 10/202:32 pmPDX - DEN
Nonstop2h 30mAlaska Airlines
jue. 10/237:02 pmDEN - PDX
Nonstop2h 48mAlaska Airlines
Deal found 7/16$157
This Southwest deal was found by Cheapflights users on 7/16. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
jue. 10/23:50 pmSEA - DEN
Nonstop2h 40mSouthwest
dom. 10/57:50 amDEN - SEA
Nonstop3h 05mSouthwest
Deal found 7/16$165
This Southwest deal was found by Cheapflights users on 7/17. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mié. 8/277:10 amPDX - DEN
2 stops7h 50mSouthwest
mié. 9/38:45 pmDEN - PDX
Nonstop2h 35mSouthwest
Deal found 7/17$172
This Delta deal was found by Cheapflights users on 7/16. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
dom. 9/286:00 pmSEA - DEN
Nonstop2h 42mDelta
vie. 10/36:55 amDEN - SEA
Nonstop2h 59mDelta
Deal found 7/16$173
This Alaska Airlines deal was found by Cheapflights users on 7/17. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
vie. 9/127:50 amSEA - DEN
1 stop9h 47mAlaska Airlines
lun. 9/159:23 pmDEN - SEA
Nonstop3h 05mAlaska Airlines
Deal found 7/17$175
This Delta deal was found by Cheapflights users on 7/17. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mié. 8/205:05 pmPDX - COS
1 stop4h 13mDelta
mié. 9/108:00 amCOS - PDX
1 stop5h 12mDelta
Deal found 7/17$177
This American Airlines deal was found by Cheapflights users on 7/17. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mar. 9/166:11 amSEA - DEN
1 stop7h 16mAmerican Airlines
mar. 9/233:07 pmDEN - SEA
1 stop7h 01mAmerican Airlines
Deal found 7/17$177

Cheapflights Fare Finder

Customize your flight search to find flights from Washington to Colorado 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 julio 18, 2025.
Use the filters below to find and compare flights from Washington to Colorado that are best for you.

Fly from

Washington

Fly to

Colorado

Route

Depart

Return

Price

EverettDenver

PAE - DEN

PAEDEN

Everett Paine Field

vie. 8/29

12:34 pm-4:19 pm

Nonstop2h 45m

Denver Intl

lun. 9/1

9:36 am-11:39 am

Nonstop3h 03m

$109

PortlandDenver

PDX - DEN

PDXDEN

Portland

mié. 8/27

6:51 am-10:30 am

Nonstop2h 39m

Denver Intl

mié. 9/3

8:50 pm-10:39 pm

Nonstop2h 49m

$112

SpokaneDenver

GEG - DEN

GEGDEN

Spokane

vie. 9/5

11:53 am-3:12 pm

Nonstop2h 19m

Denver Intl

dom. 9/7

9:38 am-10:58 am

Nonstop2h 20m

$118

SeattleDenver

SEA - DEN

SEADEN

Seattle/Tacoma Intl

jue. 8/14

6:25 am-10:14 am

Nonstop2h 49m

Denver Intl

lun. 8/18

4:57 pm-6:59 pm

Nonstop3h 02m

$135

SeattleDenver

SEA - DEN

SEADEN

Seattle/Tacoma Intl

sáb. 10/25

5:59 pm-9:46 pm

Nonstop2h 47m

Denver Intl

mar. 10/28

8:02 pm-10:13 pm

Nonstop3h 11m

$145

PortlandDenver

PDX - DEN

PDXDEN

Portland

lun. 10/20

2:32 pm-6:02 pm

Nonstop2h 30m

Denver Intl

sáb. 10/25

7:02 pm-8:50 pm

Nonstop2h 48m

$157

SeattleDenver

SEA - DEN

SEADEN

Seattle/Tacoma Intl

jue. 10/2

3:50 pm-7:30 pm

Nonstop2h 40m

Denver Intl

dom. 10/5

10:40 pm-12:35 am

Nonstop2h 55m

$165

PortlandDenver

PDX - DEN

PDXDEN

Portland

mié. 8/27

7:10 am-4:00 pm

2 stops7h 50m

Denver Intl

mié. 9/3

8:45 pm-10:20 pm

Nonstop2h 35m

$172

SeattleDenver

SEA - DEN

SEADEN

Seattle/Tacoma Intl

dom. 9/28

6:00 pm-9:42 pm

Nonstop2h 42m

Denver Intl

vie. 10/3

7:49 pm-10:01 pm

Nonstop3h 12m

$173

SeattleDenver

SEA - DEN

SEADEN

Seattle/Tacoma Intl

vie. 9/12

7:50 am-6:37 pm

1 stop9h 47m

Denver Intl

lun. 9/15

9:23 pm-11:28 pm

Nonstop3h 05m

$175

Flights are sorted by cheapest round-trip flights first.

Deals found on 7/16

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

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

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

Currently, October is the cheapest month in which you can book a flight from State of Washington to Colorado (average of $197). Flying from State of Washington to Colorado in March is currently the most expensive (average of $278). 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 WA to CO?

Find hourly flight availability from Washington to Colorado. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated julio 18, 2025.

When flying from State of Washington to Colorado, the time of day you decide to fly out makes little to no difference towards the overall price you’ll pay on tickets.

Weekly flight availability from State of Washington to Colorado

Explore weekly flight availability from Washington to Colorado. 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 julio 18, 2025.

The most flights from USWA to USCO are scheduled on a Thursday (56 on average). You will have fewer flight options on Saturday, which is when the least amount of flights are scheduled (30 on average).

How much does it cost to fly round-trip from State of Washington to Colorado?

Reviews of airlines servicing Colorado

Get insights into the airlines that provide service to Colorado. 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 Colorado. Reviews last updated julio 18, 2025.
Read through reviews of airlines operating flights from Washington to Colorado, such as Alaska Airlines, Southwest, and Delta. 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.
Alaska Airlines
8.0
Very good
10,000 reviews

Overall

8.0

Entertainment

7.1

Food

7.1

Comfort

7.8

Boarding

8.1

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Anonymous,Jul 2025

EUG - SEA

Mobility support was fabulous No flight entertainment that I was aware of.
Alaska Airlines
8.0
Very good
10,000 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Overall

8.0

Entertainment

7.1

Food

7.1

Comfort

7.8

Boarding

8.1

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Anonymous,Jul 2025

EUG - SEA

Mobility support was fabulous No flight entertainment that I was aware of.
Southwest
8.0
Very good
4,239 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Overall

8.0

Entertainment

7.1

Food

7.1

Comfort

7.8

Boarding

8.1

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Anonymous,Jul 2025

EUG - SEA

Mobility support was fabulous No flight entertainment that I was aware of.
Delta
8.0
Very good
7,959 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Overall

8.0

Entertainment

7.1

Food

7.1

Comfort

7.8

Boarding

8.1

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Anonymous,Jul 2025

EUG - SEA

Mobility support was fabulous No flight entertainment that I was aware of.
Hawaiian Airlines
7.8
Good
2,581 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Overall

8.0

Entertainment

7.1

Food

7.1

Comfort

7.8

Boarding

8.1

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Anonymous,Jul 2025

EUG - SEA

Mobility support was fabulous No flight entertainment that I was aware of.
United Airlines
7.4
Good
8,864 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Overall

8.0

Entertainment

7.1

Food

7.1

Comfort

7.8

Boarding

8.1

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Anonymous,Jul 2025

EUG - SEA

Mobility support was fabulous No flight entertainment that I was aware of.

Related info for your journey

Find useful and relevant information for your journey from Washington to Colorado. 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 State of Washington to Colorado flight route?

    This flight path from Washington to Colorado was viewed by 292 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 State of Washington to Colorado one-way?

    For one-way options, check prices for Frontier. According to our data, you can fly for as low as $59. Users have also found prices from $76 and $85 on Hawaiian Airlines and Alaska Airlines, respectively.

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

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

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

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

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

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

    Currently, October is the cheapest month in which you can book a flight from State of Washington to Colorado (average of $197). Flying from State of Washington to Colorado in March is currently the most expensive (average of $278). 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 Washington to Colorado

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

Discover the top 7 airlines that operate flights from Washington to Colorado. 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 julio 18, 2025.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$58Average$156FlexibilityNo cancel feeOn-time62%
Hawaiian AirlinesCheapest$98Average$406FlexibilityNo cancel feeOn-time85%
DeltaCheapest$108Average$314FlexibilityNo cancel feeOn-timeN/A
SouthwestCheapest$123Average$383FlexibilityNo cancel feeOn-time63%
United AirlinesCheapest$148Average$488FlexibilityNo cancel feeOn-time69%
Alaska AirlinesCheapest$157Average$420FlexibilityNo cancel feeOn-time75%
American AirlinesCheapest$169Average$441FlexibilityNo cancel feeOn-time71%

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