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$74+ 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 5/12. Fares are subject to change and may not be available on all flights or dates of travel.
COS — SEA
Mrz 27 — Apr 31
Fr 3/27
Fr 4/3
1 adult, Economy
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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 Februar 25, 2026.

This Delta deal was found by Cheapflights users on 2/23. 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.
Di 4/1411:55 am
COS
-
SEA
1 stop5h 53m
Delta
Di 4/215:35 am
SEA
-
COS
1 stop4h 37m
Delta
Deal found 2/23$137
This Southwest deal was found by Cheapflights users on 2/21. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fr 5/87:20 pm
COS
-
SEA
1 stop6h 35m
Southwest
Sa 5/1610:50 am
SEA
-
COS
1 stop6h 40m
Southwest
Deal found 2/21$151
This Southwest deal was found by Cheapflights users on 2/23. 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.
Di 4/146:50 pm
COS
-
SEA
1 stop6h 05m
Southwest
Di 4/215:30 am
SEA
-
COS
2 stops9h 00m
Southwest
Deal found 2/23$210
This Delta deal was found by Cheapflights users on 2/22. 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.
Mo 3/912:10 pm
COS
-
SEA
1 stop5h 31m
Delta
Sa 3/145:30 am
SEA
-
COS
1 stop4h 54m
Delta
Deal found 2/22$217
This Delta deal was found by Cheapflights users on 2/24. 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.
Mi 4/88:15 am
COS
-
SEA
1 stop7h 39m
Delta
Mo 4/134:36 pm
SEA
-
COS
1 stop4h 37m
Delta
Deal found 2/24$218
This United Airlines deal was found by Cheapflights users on 2/22. 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.
Di 4/141:33 pm
COS
-
SEA
2 stops8h 24m
United Airlines
Di 4/215:00 am
SEA
-
COS
1 stop5h 05m
United Airlines
Deal found 2/22$222
This United Airlines deal was found by Cheapflights users on 2/21. 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.
Sa 9/126:35 pm
COS
-
SEA
1 stop5h 24m
United Airlines
Mi 9/235:07 am
SEA
-
COS
1 stop7h 04m
United Airlines
Deal found 2/21$239
This United Airlines deal was found by Cheapflights users on 2/22. 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.
Di 5/51:25 pm
COS
-
SEA
1 stop5h 35m
United Airlines
So 5/105:05 am
SEA
-
COS
1 stop6h 21m
United Airlines
Deal found 2/22$245
This Southwest deal was found by Cheapflights users on 2/24. 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.
Mi 3/254:15 pm
COS
-
SEA
1 stop7h 15m
Southwest
Mi 4/11:25 pm
SEA
-
COS
1 stop6h 35m
Southwest
Deal found 2/24$248
This Southwest deal was found by Cheapflights users on 2/23. 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.
Do 5/287:20 pm
COS
-
SEA
1 stop6h 35m
Southwest
Mi 6/311:40 am
SEA
-
COS
1 stop9h 40m
Southwest
Deal found 2/23$252

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 Februar 25, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$137
(Delta)

One-way from

$74
(Delta)

Popular in

December

Cheapest in

January

Average price

$354
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, 1% potential price rise
Search Deals
Cheapest flight prices on average. 3% potential price decrease ($12 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in February 2026
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 Februar 25, 2026.
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

Mo 3/9

12:10 pm-4:41 pm

1 stop5h 31m

Seattle/Tacoma Intl

Sa 3/14

5:30 am-11:24 am

1 stop4h 54m

$217

Colorado SpringsSeattle

COS - SEA

COSSEA

Colorado Springs

Mi 4/8

12:10 pm-4:47 pm

1 stop5h 37m

Seattle/Tacoma Intl

Mo 4/13

4:36 pm-10:13 pm

1 stop4h 37m

$218

Colorado SpringsSeattle

COS - SEA

COSSEA

Colorado Springs

Fr 3/20

3:25 pm-9:14 pm

1 stop6h 49m

Seattle/Tacoma Intl

Di 3/24

5:00 am-11:01 am

1 stop5h 01m

$295

Colorado SpringsSeattle

COS - SEA

COSSEA

Colorado Springs

So 5/17

11:55 am-9:40 pm

2 stops10h 45m

Seattle/Tacoma Intl

Di 5/26

5:30 am-11:15 am

1 stop4h 45m

$352

Colorado SpringsSeattle

COS - SEA

COSSEA

Colorado Springs

Mo 3/9

1:32 pm-11:16 pm

2 stops10h 44m

Seattle/Tacoma Intl

Mi 3/11

5:00 am-2:20 pm

2 stops8h 20m

$357

Colorado SpringsSeattle

COS - SEA

COSSEA

Colorado Springs

Sa 6/20

7:15 am-1:55 pm

2 stops7h 40m

Seattle/Tacoma Intl

Mi 6/24

7:30 am-6:30 pm

2 stops10h 00m

$405

Colorado SpringsSeattle

COS - SEA

COSSEA

Colorado Springs

Mo 3/9

5:15 pm-9:14 pm

1 stop4h 59m

Seattle/Tacoma Intl

Sa 3/14

5:00 am-11:01 am

1 stop5h 01m

$408

Colorado SpringsSeattle

COS - SEA

COSSEA

Colorado Springs

Mi 7/8

5:30 am-2:36 pm

2 stops10h 06m

Seattle/Tacoma Intl

Mo 7/13

2:33 pm-9:26 pm

1 stop5h 53m

$408

Colorado SpringsSeattle

COS - SEA

COSSEA

Colorado Springs

Di 3/24

4:15 pm-10:30 pm

1 stop7h 15m

Seattle/Tacoma Intl

Sa 3/28

11:10 am-7:15 pm

1 stop7h 05m

$417

Colorado SpringsSeattle

COS - SEA

COSSEA

Colorado Springs

Do 8/6

5:30 am-1:25 pm

2 stops8h 55m

Seattle/Tacoma Intl

So 8/9

8:40 am-10:00 pm

2 stops12h 20m

$424

Flights are sorted by cheapest round-trip flights first.

Deals found on 2/25

Showing 1-10 of 21 results
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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 February.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy1 starTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust 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 FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on Colorado Springs-Seattle flight deals on Cheapflights vs. FlightHub >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 FlightHub the most. FlightHub 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 February 20, 2026.

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 39 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, November is the cheapest month in which you can book a flight from Colorado Springs to Seattle (average of $54). Flying from Colorado Springs to Seattle in July is currently the most expensive (average of $119). 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.

How much does it cost to fly round-trip from Colorado Springs to Seattle?

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 Februar 25, 2026.
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
4,300 reviews

Overall

8.0

Boarding

8.1

Comfort

8.0

Crew

8.6

Food

7.0

Entertainment

7.5

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
4,300 reviews
Southwest
8.0
Very good
4,300 reviews

Overall

8.0

Boarding

8.1

Comfort

8.0

Crew

8.6

Food

7.0

Entertainment

7.5

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
8,237 reviews
Southwest
8.0
Very good
4,300 reviews

Overall

8.0

Boarding

8.1

Comfort

8.0

Crew

8.6

Food

7.0

Entertainment

7.5

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
9,345 reviews
Southwest
8.0
Very good
4,300 reviews

Overall

8.0

Boarding

8.1

Comfort

8.0

Crew

8.6

Food

7.0

Entertainment

7.5

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
11,345 reviews
Southwest
8.0
Very good
4,300 reviews

Overall

8.0

Boarding

8.1

Comfort

8.0

Crew

8.6

Food

7.0

Entertainment

7.5

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 5h 40m. 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 ($136), American Airlines ($186), and Southwest ($186) offers the cheapest pricing from Colorado Springs to Seattle. Delta is currently priced 61% below the average price you’ll pay for this route.

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

    $68 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 $88 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, November is the cheapest month in which you can book a flight from Colorado Springs to Seattle (average of $54). Flying from Colorado Springs to Seattle in July is currently the most expensive (average of $119). 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
Kent
Lynnwood
Edmonds
Lacey
Renton
Puyallup
Kirkland
Tukwila
Fife
Aberdeen
Shoreline
Marysville
Centralia
Federal Way
Chehalis

Browse thousands of different options on Cheapflights for your next trip

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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 Februar 25, 2026.
AirlineCheapestAverageFlexibilityOn-time
DeltaCheapest$136Average$313FlexibilityNo cancel feeOn-timeN/A
American AirlinesCheapest$186Average$278FlexibilityNo cancel feeOn-time71%
SouthwestCheapest$186Average$382FlexibilityNo cancel feeOn-time63%
United AirlinesCheapest$217Average$378FlexibilityNo cancel feeOn-time69%

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