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$125+ Cheap flights from Colorado Springs to Seattle (COS - SEA)

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 5/9. Fares are subject to change and may not be available on all flights or dates of travel.
COS — SEA
Jan 22 — Jan 291
Thu 1/22
Thu 1/29
1 adult, Economy
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Find cheap flights from Colorado Springs to Seattle with Cheapflights

1. Tell us where you want to go

Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”

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3. Compare prices and book

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Cheapflights Tip: The best prices from Colorado Springs to Seattle/Tacoma Intl are usually found in January or October, booked 77 days in advance, depart on a Thursday or Wednesday and return on a Wednesday

Cheap flight deals from Colorado Springs to Seattle

Cheapest flights from Colorado Springs to Seattle
Explore the most affordable flight options available from Colorado Springs to Seattle. Find the lowest fares from popular airlines and budget airlines, with prices last updated on December 23, 2025.

This Delta deal was found by Cheapflights users on 12/21. 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.
Tue 12/235:59 pmCOS - SEA
1 stop7h 21mDelta
Wed 12/311:35 pmSEA - COS
1 stop5h 07mDelta
Deal found 12/21$408
This United Airlines deal was found by Cheapflights users on 12/21. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/226:23 pmCOS - SEA
1 stop5h 49mUnited Airlines
Mon 12/295:02 amSEA - COS
1 stop4h 50mUnited Airlines
Deal found 12/21$417
This United Airlines deal was found by Cheapflights users on 12/21. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/241:48 pmCOS - SEA
2 stops8h 19mUnited Airlines
Tue 12/301:35 pmSEA - COS
2 stops9h 24mUnited Airlines
Deal found 12/21$427
This Delta deal was found by Cheapflights users on 12/22. 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.
Tue 12/238:10 amCOS - SEA
1 stop5h 26mDelta
Fri 12/261:35 pmSEA - COS
1 stop7h 50mDelta
Deal found 12/22$477
This United Airlines deal was found by Cheapflights users on 12/22. 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.
Tue 12/238:20 amCOS - SEA
2 stops9h 04mUnited Airlines
Fri 12/2612:44 pmSEA - COS
1 stop7h 27mUnited Airlines
Deal found 12/22$482
This United Airlines deal was found by Cheapflights users on 12/21. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/241:48 pmCOS - SEA
2 stops10h 20mUnited Airlines
Wed 12/3112:44 pmSEA - COS
1 stop6h 32mUnited Airlines
Deal found 12/21$493
This United Airlines deal was found by Cheapflights users on 12/21. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/235:45 amCOS - SEA
1 stop5h 11mUnited Airlines
Tue 12/301:55 pmSEA - COS
1 stop6h 16mUnited Airlines
Deal found 12/21$497
This Delta deal was found by Cheapflights users on 12/21. 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.
Tue 12/238:10 amCOS - SEA
2 stops9h 50mDelta
Tue 12/301:35 pmSEA - COS
1 stop7h 50mDelta
Deal found 12/21$553
This United Airlines deal was found by Cheapflights users on 12/21. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/235:45 amCOS - SEA
1 stop5h 11mUnited Airlines
Sat 12/275:02 amSEA - COS
1 stop7h 09mUnited Airlines
Deal found 12/21$557

Find flight deals from Colorado Springs to Seattle

Discover tips and strategies to find the most affordable flight options for your journey from Colorado Springs (COS) to Seattle (SEA). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated December 23, 2025.

Most accurate provider

eDreams
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$142
(Delta)

One-way from

$125
(United Airlines)

Popular in

December

Cheapest in

January

Average price

$476
Provider with most accurate pricing for Colorado Springs-Seattle/Tacoma Intl flight deals.
Search Deals
Provider most trusted by Cheapflights users for Colorado Springs-Seattle/Tacoma Intl flights.
Search Deals
From Colorado Springs to Seattle/Tacoma Intl
Search Deals
One-way flight from Colorado Springs to Seattle/Tacoma Intl
Search Deals
High demand for flights, 3% potential price rise
Search Deals
Cheapest flight prices on average. 3% potential price decrease ($11 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in December 2025
Search Deals

Cheapflights Fare Finder

 
Customize your flight search to find flights from Colorado Springs to Seattle 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 December 23, 2025.
Use the filters below to find and compare flights from Colorado Springs to Seattle that are best for you.

Fly from

Colorado Springs

Fly to

Seattle

Route

Depart

Return

Price

Colorado SpringsSeattle

COS - SEA

COSSEA

Colorado Springs

Fri 1/16

7:59 am-4:58 pm

2 stops9h 59m

Seattle/Tacoma Intl

Tue 1/20

5:30 am-11:17 am

1 stop4h 47m

$142

Colorado SpringsSeattle

COS - SEA

COSSEA

Colorado Springs

Fri 1/16

6:10 pm-11:15 pm

1 stop6h 05m

Seattle/Tacoma Intl

Tue 1/20

2:05 pm-9:35 pm

1 stop6h 30m

$151

Colorado SpringsSeattle

COS - SEA

COSSEA

Colorado Springs

Tue 2/3

12:03 pm-6:29 pm

1 stop7h 26m

Seattle/Tacoma Intl

Thu 2/12

5:30 am-11:15 am

1 stop4h 45m

$168

Colorado SpringsSeattle

COS - SEA

COSSEA

Colorado Springs

Sun 1/18

12:00 pm-4:38 pm

1 stop5h 38m

Seattle/Tacoma Intl

Sun 1/25

5:00 am-11:17 am

1 stop5h 17m

$203

Colorado SpringsSeattle

COS - SEA

COSSEA

Colorado Springs

Sun 1/18

3:30 pm-11:16 pm

2 stops8h 46m

Seattle/Tacoma Intl

Sun 1/25

5:00 am-10:57 am

1 stop4h 57m

$224

Colorado SpringsSeattle

COS - SEA

COSSEA

Colorado Springs

Sun 3/15

7:55 am-2:54 pm

1 stop7h 59m

Seattle/Tacoma Intl

Thu 3/19

5:30 am-11:14 am

1 stop4h 44m

$272

Colorado SpringsSeattle

COS - SEA

COSSEA

Colorado Springs

Sat 4/4

7:55 pm-1:25 am

1 stop6h 30m

Seattle/Tacoma Intl

Sun 4/12

4:45 pm-10:00 pm

1 stop4h 15m

$302

Colorado SpringsSeattle

COS - SEA

COSSEA

Colorado Springs

Wed 1/7

7:59 am-12:33 pm

1 stop5h 34m

Seattle/Tacoma Intl

Sun 1/11

5:25 am-11:17 am

1 stop4h 52m

$317

Colorado SpringsSeattle

COS - SEA

COSSEA

Colorado Springs

Wed 1/7

10:33 am-6:27 pm

2 stops8h 54m

Seattle/Tacoma Intl

Sun 1/11

5:00 am-10:57 am

1 stop4h 57m

$322

Colorado SpringsSeattle

COS - SEA

COSSEA

Colorado Springs

Sat 5/9

1:45 pm-8:57 pm

2 stops8h 12m

$125

Flights are sorted by cheapest round-trip flights first.

Deals found on 12/22

Showing 1-10 of 18 results
1
2

Compare providers for flights from Colorado Springs to Seattle

Provider information is updated monthly. Please note that these providers often have deals for this flight, but the availability may vary on a day-by-day basis on Cheapflights.
Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from Colorado Springs to Seattle in December.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy2 starsTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*1 star
eDreamsPrice Accuracy3 starsTrust Score*3 stars
PricelinePrice Accuracy1 starTrust Score*3 stars

*The Trust Score is based on feedback from users after their booking experience. It measures overall satisfaction, helping us identify issues like hidden fees, problems during the ticketing process, and the quality of customer service. This score is our best indicator of the provider's quality and reliability.

  • Most accurate provider: When it comes to deals on Colorado Springs-Seattle flights, users find the pricing of eDreams to be most consistent on Cheapflights vs. eDreams Users can find the same prices on Colorado Springs-Seattle flight deals on Cheapflights vs. eDreams >95% of the time. Price accuracy is based on data collected from Colorado Springs-Seattle flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on Colorado Springs-Seattle flights, Cheapflights users trust eDreams the most. eDreams has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for Colorado Springs-Seattle flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.

Best time to book a flight from Colorado Springs to Seattle

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

How far ahead should I book a flight from Colorado Springs to Seattle?

Use this chart to determine the optimal time to book a round-trip flight from Colorado Springs to Seattle. Price data was last updated on December 19, 2025.

The price you pay for your flight from Colorado Springs to Seattle may vary depending on when you book. For the best chance of a lower fare, look to book 77 days in advance of your trip. Fares are likely to increase a fortnight or so before your departure date.

What is the cheapest month to book a flight from Colorado Springs to Seattle?

Currently, February is the cheapest month in which you can book a flight from Colorado Springs to Seattle (average of $48). Flying from Colorado Springs to Seattle in July is currently the most expensive (average of $118). 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.

Reviews of airlines servicing Seattle

Get insights into the airlines that provide service to Seattle. 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 Seattle. Reviews last updated December 23, 2025.
Peruse reviews from past customers who have flown with Southwest, Delta, and United Airlines from Colorado Springs to Seattle to help guide your decision. You can also see how each airline stacks up in terms of entertainment options, comfort, food, crew/service, and boarding process.
Southwest
8.0
Very good
4,253 reviews

Entertainment

7.5

Food

7.0

Boarding

8.1

Overall

8.0

Comfort

8.0

Crew

8.6

Reviews

1 / 20
2.0
Mediocre

Thomas,Dec 2025

SEA - DEN

Plane two hours late in leaving 1:00 pm west coat time got home next day at 2:45am most car rental places are closed and don’t open till 5am
Southwest
8.0
Very good
4,253 reviews
Southwest
8.0
Very good
4,253 reviews

Entertainment

7.5

Food

7.0

Boarding

8.1

Overall

8.0

Comfort

8.0

Crew

8.6

Reviews

1 / 20
2.0
Mediocre

Thomas,Dec 2025

SEA - DEN

Plane two hours late in leaving 1:00 pm west coat time got home next day at 2:45am most car rental places are closed and don’t open till 5am
Delta
7.9
Good
8,014 reviews
Southwest
8.0
Very good
4,253 reviews

Entertainment

7.5

Food

7.0

Boarding

8.1

Overall

8.0

Comfort

8.0

Crew

8.6

Reviews

1 / 20
2.0
Mediocre

Thomas,Dec 2025

SEA - DEN

Plane two hours late in leaving 1:00 pm west coat time got home next day at 2:45am most car rental places are closed and don’t open till 5am
United Airlines
7.4
Good
9,105 reviews
Southwest
8.0
Very good
4,253 reviews

Entertainment

7.5

Food

7.0

Boarding

8.1

Overall

8.0

Comfort

8.0

Crew

8.6

Reviews

1 / 20
2.0
Mediocre

Thomas,Dec 2025

SEA - DEN

Plane two hours late in leaving 1:00 pm west coat time got home next day at 2:45am most car rental places are closed and don’t open till 5am
American Airlines
7.2
Good
11,054 reviews
Southwest
8.0
Very good
4,253 reviews

Entertainment

7.5

Food

7.0

Boarding

8.1

Overall

8.0

Comfort

8.0

Crew

8.6

Reviews

1 / 20
2.0
Mediocre

Thomas,Dec 2025

SEA - DEN

Plane two hours late in leaving 1:00 pm west coat time got home next day at 2:45am most car rental places are closed and don’t open till 5am

Related info for your journey

Find useful and relevant information for your journey from Colorado Springs to Seattle. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • How long is the flight from Colorado Springs to Seattle?

    Departing from Colorado Springs to Seattle will take you 6h 05m. Colorado Springs and Seattle are separated by a distance of 1065 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 flying from Colorado Springs to Seattle round-trip?

    According to our current data, Delta ($133), American Airlines ($186), and Southwest ($207) offers the cheapest pricing from Colorado Springs to Seattle. Delta is currently priced 62% below the average price you’ll pay for this route.

  • What are the cheapest airlines to fly from Colorado Springs to Seattle one-way?

    $69 is the cheapest one-way deal found within the past few days, from Delta. You may also be able to find cheap deals on Southwest and United Airlines, with prices starting from $87 and $108, respectively.

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

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

  • How can I find direct flights from Colorado Springs to Seattle?

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

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

    Yes. Cheapflights offers flight deals from Colorado Springs to Seattle 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 Springs to Seattle?

    Currently, February is the cheapest month in which you can book a flight from Colorado Springs to Seattle (average of $48). Flying from Colorado Springs to Seattle in July is currently the most expensive (average of $118). 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

Traveling to a place near Seattle?

Book flights to Seattle if you plan to visit one of these locations
Tacoma
SeaTac
Lakewood
Ocean Shores
Olympia
Edmonds
Lynnwood
Renton
Puyallup
Kirkland
Kent
Tukwila
Cle Elum
Marysville
Fife
Aberdeen
Shoreline
Centralia
Federal Way
Chehalis

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Top 4 airlines flying from Colorado Springs to Seattle

Discover the top 4 airlines that operate flights from Colorado Springs to Seattle. 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 December 23, 2025.
AirlineCheapestAverageFlexibilityOn-time
DeltaCheapest$156Average$337FlexibilityNo cancel feeOn-timeN/A
American AirlinesCheapest$186Average$236FlexibilityNo cancel feeOn-time71%
SouthwestCheapest$207Average$384FlexibilityNo cancel feeOn-time63%
United AirlinesCheapest$216Average$377FlexibilityNo cancel feeOn-time69%

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