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$43+ 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 9/4. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — DEN
ago. 3 — ago. 101
dom. 8/3
dom. 8/10
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 29, 2025.

Round-trip from

$102
(Priceline)

One-way from

$43
(FlightHub)

Popular in

December

Cheapest in

October

Average price

$216

Good round-trip deal

$139 or less

Good one-way deal

$126 or less
From Washington to Colorado
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One-way flight from Washington to Colorado
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Highest demand for flights based on searches. 0% potential increase in price ($0 potential increase over avg. RT price).
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Cheapest flight prices on average. 1% 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 29, 2025.

This Cheapflightsfares deal was found by Cheapflights users on 7/29. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
vie. 8/296:27 amPDX - DEN
Nonstop2h 39mFrontier
lun. 9/110:29 pmDEN - PDX
Nonstop2h 46mFrontier
Deal found 7/29$102
This Priceline deal was found by Cheapflights users on 7/27. 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.
dom. 8/311:58 amGEG - DEN
Nonstop2h 19mFrontier
mar. 8/129:45 amDEN - GEG
Nonstop2h 21mFrontier
Deal found 7/27$117
This Frontier deal was found by Cheapflights users on 7/29. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
lun. 9/86:12 amSEA - DEN
Nonstop2h 56mFrontier
sáb. 9/136:33 pmDEN - SEA
Nonstop3h 06mFrontier
Deal found 7/29$125
This Cheapflightsfares deal was found by Cheapflights users on 7/28. 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.
vie. 8/812:36 pmPAE - DEN
Nonstop2h 45mFrontier
vie. 8/159:45 amDEN - PAE
Nonstop3h 03mFrontier
Deal found 7/28$143
This Trip.com deal was found by Cheapflights users on 7/27. 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.
sáb. 10/256:00 amSEA - DEN
Nonstop2h 51mMultiple Airlines
lun. 10/276:46 pmDEN - SEA
1 stop5h 18mMultiple Airlines
Deal found 7/27$152
This Hawaiian Airlines deal was found by Cheapflights users on 7/29. 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.
mié. 12/32:31 pmPDX - DEN
Nonstop2h 32mHawaiian Airlines
mié. 12/1011:30 amDEN - PDX
Nonstop2h 44mHawaiian Airlines
Deal found 7/29$157
This KAYAK deal was found by Cheapflights users on 7/29. 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 KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
sáb. 10/251:35 pmSEA - DEN
Nonstop2h 46mHawaiian Airlines
lun. 10/276:46 pmDEN - SEA
1 stop5h 18mHawaiian Airlines
Deal found 7/29$161
This Delta deal was found by Cheapflights users on 7/28. 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. 9/243:15 pmSEA - DEN
Nonstop2h 41mDelta
jue. 9/257:49 pmDEN - SEA
Nonstop3h 12mDelta
Deal found 7/28$165
This Alaska Airlines deal was found by Cheapflights users on 7/29. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mar. 9/166:00 pmSEA - DEN
Nonstop3h 02mAlaska Airlines
mar. 9/2311:40 amDEN - SEA
1 stop7h 10mAlaska Airlines
Deal found 7/29$167
This Delta deal was found by Cheapflights users on 7/29. 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.
jue. 9/412:45 pmPSC - DEN
1 stop6h 01mDelta
lun. 9/85:45 amDEN - PSC
1 stop3h 58mDelta
Deal found 7/29$189
This Delta deal was found by Cheapflights users on 7/29. 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.
mar. 8/2611:55 pmSEA - COS
1 stop9h 21mDelta
mar. 9/25:55 pmCOS - SEA
1 stop5h 19mDelta
Deal found 7/29$197
This Orbitz deal was found by Cheapflights users on 7/27. 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.
jue. 9/411:53 amGEG - DEN
Nonstop2h 19mMultiple Airlines
sáb. 9/611:40 amDEN - GEG
1 stop5h 03mMultiple Airlines
Deal found 7/27$202

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 29, 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

PortlandDenver

PDX - DEN

PDXDEN

Portland

jue. 10/30

6:05 am-9:46 am

Nonstop2h 41m

Denver Intl

dom. 11/2

10:29 pm-12:16 am

Nonstop2h 47m

$102

SpokaneDenver

GEG - DEN

GEGDEN

Spokane

jue. 9/18

11:53 am-3:12 pm

Nonstop2h 19m

Denver Intl

dom. 9/21

9:38 am-10:58 am

Nonstop2h 20m

$119

SeattleDenver

SEA - DEN

SEADEN

Seattle/Tacoma Intl

vie. 10/3

6:12 am-10:08 am

Nonstop2h 56m

Denver Intl

lun. 10/13

10:29 pm-12:31 am

Nonstop3h 02m

$126

EverettDenver

PAE - DEN

PAEDEN

Everett Paine Field

vie. 8/8

12:36 pm-4:21 pm

Nonstop2h 45m

Denver Intl

vie. 8/15

9:45 am-11:48 am

Nonstop3h 03m

$143

SeattleDenver

SEA - DEN

SEADEN

Seattle/Tacoma Intl

sáb. 10/25

6:00 am-9:51 am

Nonstop2h 51m

Denver Intl

lun. 10/27

6:46 pm-11:04 pm

1 stop5h 18m

$152

PortlandDenver

PDX - DEN

PDXDEN

Portland

sáb. 9/20

5:10 am-8:40 am

Nonstop2h 30m

Denver Intl

sáb. 9/27

8:00 am-9:40 am

Nonstop2h 40m

$157

SeattleDenver

SEA - DEN

SEADEN

Seattle/Tacoma Intl

sáb. 10/25

1:35 pm-5:21 pm

Nonstop2h 46m

Denver Intl

lun. 10/27

6:46 pm-11:04 pm

1 stop5h 18m

$161

SeattleDenver

SEA - DEN

SEADEN

Seattle/Tacoma Intl

mié. 9/24

3:15 pm-6:56 pm

Nonstop2h 41m

Denver Intl

jue. 9/25

7:49 pm-10:01 pm

Nonstop3h 12m

$165

SeattleDenver

SEA - DEN

SEADEN

Seattle/Tacoma Intl

mar. 9/16

6:00 pm-10:02 pm

Nonstop3h 02m

Denver Intl

mar. 9/23

11:40 am-5:50 pm

1 stop7h 10m

$167

PortlandDenver

PDX - DEN

PDXDEN

Portland

mié. 9/17

1:24 pm-8:27 pm

1 stop6h 03m

Denver Intl

sáb. 9/20

11:40 am-1:23 pm

Nonstop2h 43m

$167

Flights are sorted by cheapest round-trip flights first.

Deals found on 7/27

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 29, 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 29, 2025.

The most flights from USWA to USCO are scheduled on a Monday (53 on average). You will have fewer flight options on Saturday, which is when the least amount of flights are scheduled (30 on average).

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 29, 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

Food

7.1

Crew

8.5

Boarding

8.1

Overall

8.0

Entertainment

7.1

Comfort

7.8

Reviews

1 / 20
10.0
Excellent

Jonathan,Jul 2025

SEA - BOS

Fantastic Check-in with easy baggage drop. While it took a while to find out which was the gate, the boarding was a dream, the stewards were simply incredible and the flight fantastic.
Alaska Airlines
8.0
Very good
10,000 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Food

7.1

Crew

8.5

Boarding

8.1

Overall

8.0

Entertainment

7.1

Comfort

7.8

Reviews

1 / 20
10.0
Excellent

Jonathan,Jul 2025

SEA - BOS

Fantastic Check-in with easy baggage drop. While it took a while to find out which was the gate, the boarding was a dream, the stewards were simply incredible and the flight fantastic.
Southwest
8.0
Very good
4,238 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Food

7.1

Crew

8.5

Boarding

8.1

Overall

8.0

Entertainment

7.1

Comfort

7.8

Reviews

1 / 20
10.0
Excellent

Jonathan,Jul 2025

SEA - BOS

Fantastic Check-in with easy baggage drop. While it took a while to find out which was the gate, the boarding was a dream, the stewards were simply incredible and the flight fantastic.
Delta
8.0
Very good
7,977 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Food

7.1

Crew

8.5

Boarding

8.1

Overall

8.0

Entertainment

7.1

Comfort

7.8

Reviews

1 / 20
10.0
Excellent

Jonathan,Jul 2025

SEA - BOS

Fantastic Check-in with easy baggage drop. While it took a while to find out which was the gate, the boarding was a dream, the stewards were simply incredible and the flight fantastic.
Hawaiian Airlines
7.8
Good
2,605 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Food

7.1

Crew

8.5

Boarding

8.1

Overall

8.0

Entertainment

7.1

Comfort

7.8

Reviews

1 / 20
10.0
Excellent

Jonathan,Jul 2025

SEA - BOS

Fantastic Check-in with easy baggage drop. While it took a while to find out which was the gate, the boarding was a dream, the stewards were simply incredible and the flight fantastic.
United Airlines
7.4
Good
8,899 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Food

7.1

Crew

8.5

Boarding

8.1

Overall

8.0

Entertainment

7.1

Comfort

7.8

Reviews

1 / 20
10.0
Excellent

Jonathan,Jul 2025

SEA - BOS

Fantastic Check-in with easy baggage drop. While it took a while to find out which was the gate, the boarding was a dream, the stewards were simply incredible and the flight fantastic.

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 298 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 $43. Users have also found prices from $79 and $82 on Alaska Airlines and Hawaiian 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.

See more FAQs

Browse thousands of different options on Cheapflights for your next trip

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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 29, 2025.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$61Average$156FlexibilityNo cancel feeOn-time62%
Hawaiian AirlinesCheapest$98Average$402FlexibilityNo cancel feeOn-time85%
DeltaCheapest$108Average$319FlexibilityNo cancel feeOn-timeN/A
SouthwestCheapest$126Average$382FlexibilityNo 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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