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$28+ 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 1/8. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — DEN
nov. 28 — dic. 51
vie. 11/28
vie. 12/5
1 adult, Economy
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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 octubre 29, 2025.

This Frontier deal was found by Cheapflights users on 10/29. 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.
mar. 11/41:37 pmSEA - DEN
Nonstop2h 53mFrontier
mar. 11/189:58 amDEN - SEA
Nonstop3h 09mFrontier
Deal found 10/29$93
This Kiwi.com deal was found by Cheapflights users on 10/27. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mié. 11/1910:54 amSEA - DEN
Nonstop2h 47mMultiple Airlines
mié. 11/269:44 amDEN - SEA
Nonstop3h 12mMultiple Airlines
Deal found 10/27$94
This Frontier deal was found by Cheapflights users on 10/27. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
sáb. 11/1512:58 pmSEA - DEN
Nonstop2h 59mFrontier
dom. 11/166:00 amDEN - SEA
1 stop8h 37mFrontier
Deal found 10/27$96
This Cheapflightsfares deal was found by Cheapflights users on 10/29. 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.
mar. 11/111:26 pmPDX - DEN
Nonstop2h 47mFrontier
lun. 11/176:00 amDEN - PDX
1 stop14h 59mFrontier
Deal found 10/29$96
This Delta deal was found by Cheapflights users on 10/28. 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.
vie. 12/127:35 pmSEA - DEN
Nonstop2h 46mDelta
lun. 12/156:05 amDEN - SEA
Nonstop3h 10mDelta
Deal found 10/28$97
This Cheapflightsfares deal was found by Cheapflights users on 10/28. 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. 11/143:26 pmPDX - DEN
Nonstop2h 41mFrontier
mar. 11/1810:05 amDEN - PDX
Nonstop2h 51mFrontier
Deal found 10/28$97
This CheapOair deal was found by Cheapflights users on 10/29. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mié. 11/121:37 pmSEA - DEN
Nonstop2h 53mFrontier
sáb. 11/158:45 pmDEN - SEA
1 stop17h 52mFrontier
Deal found 10/29$98
This Delta deal was found by Cheapflights users on 10/28. 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.
jue. 12/47:35 pmSEA - DEN
Nonstop2h 46mDelta
dom. 12/76:05 amDEN - SEA
Nonstop3h 10mDelta
Deal found 10/28$99
This Kiwi.com deal was found by Cheapflights users on 10/26. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mié. 12/243:59 pmPDX - DEN
1 stop15h 56mFrontier
jue. 1/19:43 amDEN - PDX
Nonstop3h 00mFrontier
Deal found 10/26$101
This Priceline deal was found by Cheapflights users on 10/28. 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 Priceline is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
jue. 12/1111:01 amSEA - DEN
1 stop8h 11mFrontier
dom. 12/149:42 amDEN - SEA
Nonstop3h 11mFrontier
Deal found 10/28$102
This Frontier deal was found by Cheapflights users on 10/28. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
jue. 12/2512:47 pmPDX - DEN
Nonstop2h 28mFrontier
sáb. 1/39:52 amDEN - PDX
Nonstop3h 00mFrontier
Deal found 10/28$102
This Orbitz deal was found by Cheapflights users on 10/29. 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.
mié. 11/197:00 amPDX - DEN
Nonstop2h 35mMultiple Airlines
dom. 11/231:10 pmDEN - PDX
Nonstop2h 57mMultiple Airlines
Deal found 10/29$103

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 octubre 29, 2025.

Most accurate provider

Mytrip
3 stars

Most trusted provider

Mytrip
3 stars

Round-trip from

$94
(Kiwi.com)

One-way from

$28
(Kiwi.com)

Popular in

December

Cheapest in

January

Average price

$188

Good round-trip deal

$133 or less

Good one-way deal

$85 or less
Provider with most accurate pricing for Seattle/Tacoma Intl-Denver Intl flight deals.
Search Deals
Provider most trusted by Cheapflights users for Seattle/Tacoma Intl-Denver Intl flights.
Search Deals
From Washington to Colorado
Search Deals
One-way flight from Washington to Colorado
Search Deals
High demand for flights, 0% potential price rise
Search Deals
Cheapest flight prices on average. 1% potential price decrease ($4 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in October 2025
Search Deals
Price to beat on a round-trip flight from Washington to Colorado.
Search Deals
Price to beat on a one-way flight from Washington to Colorado.
Search Deals

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 octubre 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

SeattleDenver

SEA - DEN

SEADEN

Seattle/Tacoma Intl

vie. 12/12

7:35 pm-11:21 pm

Nonstop2h 46m

Denver Intl

lun. 12/15

6:05 am-8:15 am

Nonstop3h 10m

$97

SeattleDenver

SEA - DEN

SEADEN

Seattle/Tacoma Intl

jue. 12/4

7:35 pm-11:21 pm

Nonstop2h 46m

Denver Intl

dom. 12/7

6:05 am-8:15 am

Nonstop3h 10m

$99

SeattleDenver

SEA - DEN

SEADEN

Seattle/Tacoma Intl

mié. 12/10

9:25 am-6:00 pm

2 stops7h 35m

Denver Intl

dom. 12/14

8:30 am-10:40 am

Nonstop3h 10m

$128

SeattleDenver

SEA - DEN

SEADEN

Seattle/Tacoma Intl

lun. 11/17

5:20 am-10:35 am

1 stop4h 15m

Denver Intl

mié. 11/19

11:31 am-3:37 pm

1 stop5h 06m

$128

SeattleDenver

SEA - DEN

SEADEN

Seattle/Tacoma Intl

jue. 12/4

6:15 am-2:10 pm

2 stops6h 55m

Denver Intl

dom. 12/7

10:35 pm-12:35 am

Nonstop3h 00m

$128

SeattleDenver

SEA - DEN

SEADEN

Seattle/Tacoma Intl

dom. 12/14

7:55 am-11:44 am

Nonstop2h 49m

Denver Intl

vie. 12/19

6:02 am-8:10 am

Nonstop3h 08m

$133

SeattleDenver

SEA - DEN

SEADEN

Seattle/Tacoma Intl

mié. 11/19

10:54 am-2:41 pm

Nonstop2h 47m

Denver Intl

mié. 11/26

8:13 pm-10:20 pm

Nonstop3h 07m

$143

SeattleDenver

SEA - DEN

SEADEN

Seattle/Tacoma Intl

mié. 11/19

5:20 am-10:35 am

1 stop4h 15m

Denver Intl

vie. 11/28

6:14 am-8:26 am

Nonstop3h 12m

$143

PortlandDenver

PDX - DEN

PDXDEN

Portland

mié. 1/7

6:20 am-9:45 am

Nonstop2h 25m

Denver Intl

jue. 1/15

11:50 am-1:45 pm

Nonstop2h 55m

$147

SeattleDenver

SEA - DEN

SEADEN

Seattle/Tacoma Intl

mié. 11/19

5:20 am-10:35 am

1 stop4h 15m

Denver Intl

dom. 11/23

6:14 am-8:26 am

Nonstop3h 12m

$153

Flights are sorted by cheapest round-trip flights first.

Deals found on 10/29

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, January is the cheapest month in which you can book a flight from State of Washington to Colorado (average of $46). Flying from State of Washington to Colorado in July is currently the most expensive (average of $99). 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 octubre 29, 2025.

When flying from State of Washington to Colorado, the time of day you fly usually plays a role in the price. Save by searching for a flight in the evening, which can drop the price by up to 39% versus a flight in the morning.

What is the cheapest day to fly from State of Washington to Colorado?

Use this chart to determine the cheapest time to fly round-trip from Washington to Colorado. Price data was last updated on December 16, 2024.

Travelers seeking maximum savings on their State of Washington to Colorado flight should consider departing on Monday afternoons when fares are most often at their lowest. Saturday afternoons flights should be avoided if possible as fares are typically the most expensive at this time.

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 octubre 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
11,206 reviews

Entertainment

7.0

Boarding

8.1

Food

7.1

Overall

8.0

Comfort

7.8

Crew

8.5

Reviews

1 / 20
8.0
Excellent

Anonymous,Sep 2025

SEA - MKE

The crew were excellent, flight good, but the actual space for a person to occupy for 4 hours seems to get smaller and smaller 🤣. I am not overweight, and average height….very uncomfortable,, especially when I couldn’t recliner the seat at all, and the pocket in front doesn’t accommodate a water bottle.
Alaska Airlines
8.0
Very good
11,206 reviews
Alaska Airlines
8.0
Very good
11,206 reviews

Entertainment

7.0

Boarding

8.1

Food

7.1

Overall

8.0

Comfort

7.8

Crew

8.5

Reviews

1 / 20
8.0
Excellent

Anonymous,Sep 2025

SEA - MKE

The crew were excellent, flight good, but the actual space for a person to occupy for 4 hours seems to get smaller and smaller 🤣. I am not overweight, and average height….very uncomfortable,, especially when I couldn’t recliner the seat at all, and the pocket in front doesn’t accommodate a water bottle.
Southwest
8.0
Very good
4,241 reviews
Alaska Airlines
8.0
Very good
11,206 reviews

Entertainment

7.0

Boarding

8.1

Food

7.1

Overall

8.0

Comfort

7.8

Crew

8.5

Reviews

1 / 20
8.0
Excellent

Anonymous,Sep 2025

SEA - MKE

The crew were excellent, flight good, but the actual space for a person to occupy for 4 hours seems to get smaller and smaller 🤣. I am not overweight, and average height….very uncomfortable,, especially when I couldn’t recliner the seat at all, and the pocket in front doesn’t accommodate a water bottle.
Delta
7.9
Good
7,993 reviews
Alaska Airlines
8.0
Very good
11,206 reviews

Entertainment

7.0

Boarding

8.1

Food

7.1

Overall

8.0

Comfort

7.8

Crew

8.5

Reviews

1 / 20
8.0
Excellent

Anonymous,Sep 2025

SEA - MKE

The crew were excellent, flight good, but the actual space for a person to occupy for 4 hours seems to get smaller and smaller 🤣. I am not overweight, and average height….very uncomfortable,, especially when I couldn’t recliner the seat at all, and the pocket in front doesn’t accommodate a water bottle.
United Airlines
7.4
Good
9,001 reviews
Alaska Airlines
8.0
Very good
11,206 reviews

Entertainment

7.0

Boarding

8.1

Food

7.1

Overall

8.0

Comfort

7.8

Crew

8.5

Reviews

1 / 20
8.0
Excellent

Anonymous,Sep 2025

SEA - MKE

The crew were excellent, flight good, but the actual space for a person to occupy for 4 hours seems to get smaller and smaller 🤣. I am not overweight, and average height….very uncomfortable,, especially when I couldn’t recliner the seat at all, and the pocket in front doesn’t accommodate a water bottle.
Frontier
5.8
Fair
3,124 reviews
Alaska Airlines
8.0
Very good
11,206 reviews

Entertainment

7.0

Boarding

8.1

Food

7.1

Overall

8.0

Comfort

7.8

Crew

8.5

Reviews

1 / 20
8.0
Excellent

Anonymous,Sep 2025

SEA - MKE

The crew were excellent, flight good, but the actual space for a person to occupy for 4 hours seems to get smaller and smaller 🤣. I am not overweight, and average height….very uncomfortable,, especially when I couldn’t recliner the seat at all, and the pocket in front doesn’t accommodate a water bottle.

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 308 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 State of Washington to Colorado?

    Airlines like Delta, Southwest, and Alaska Airlines fly from State of Washington to Colorado in about 2h 46m. The time it takes to get you to your destination can typically vary by up to 4h 49m. The distance from State of Washington to Colorado is about 1022 mi. When browsing for deals, the options you’ll see will be for both nonstop flights and flights with stops.

  • 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 $29. Users have also found prices from $59 and $64 on United 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, January is the cheapest month in which you can book a flight from State of Washington to Colorado (average of $46). Flying from State of Washington to Colorado in July is currently the most expensive (average of $99). 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

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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 octubre 29, 2025.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$61Average$156FlexibilityNo cancel feeOn-time62%
Hawaiian AirlinesCheapest$87Average$370FlexibilityNo cancel feeOn-time85%
SouthwestCheapest$118Average$376FlexibilityNo cancel feeOn-time63%
DeltaCheapest$118Average$308FlexibilityNo cancel feeOn-timeN/A
United AirlinesCheapest$154Average$482FlexibilityNo cancel feeOn-time69%
Alaska AirlinesCheapest$168Average$420FlexibilityNo cancel feeOn-time75%
American AirlinesCheapest$216Average$476FlexibilityNo cancel feeOn-time71%

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