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$79+ 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 2/18. Fares are subject to change and may not be available on all flights or dates of travel.
COS — SEA
Nov 29 — Dec 61
Sat 11/29
Sat 12/6
1 adult, Economy
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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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Cheapflights Tip: The best prices from Colorado Springs to Seattle/Tacoma Intl are usually found in January or February, booked 77 days in advance, depart on a Thursday or Wednesday and return on a Wednesday

Cheap 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 October 30, 2025.

Most accurate provider

eDreams
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$158
(American Airlines)

One-way from

$79
(Delta)

Popular in

June

Cheapest in

January

Average price

$359
Provider with most accurate pricing for Colorado Springs-Seattle/Tacoma Intl flight deals.
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Provider most trusted by Cheapflights users for Colorado Springs-Seattle/Tacoma Intl flights.
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From Colorado Springs to Seattle/Tacoma Intl
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One-way flight from Colorado Springs to Seattle/Tacoma Intl
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Highest demand for flights based on searches. 12% potential increase in price ($53 potential increase over avg. RT price).
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Cheapest flight prices on average. 2% potential price decrease ($9 potential savings vs. average RT price).
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Average for round-trip flights in October 2025
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Find 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 October 30, 2025.

This American Airlines 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/1610:37 amCOS - SEA
1 stop8h 14mAmerican Airlines
Sun 1/188:35 amSEA - COS
1 stop8h 06mAmerican Airlines
Deal found 10/29$158
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.
Wed 12/178:10 amCOS - SEA
1 stop7h 49mDelta
Sun 1/115:25 amSEA - COS
1 stop4h 52mDelta
Deal found 10/28$167
This Delta 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/168:10 amCOS - SEA
2 stops10h 00mDelta
Sun 1/185:25 amSEA - COS
1 stop4h 52mDelta
Deal found 10/29$172
This Delta deal was found by Cheapflights users on 10/30. 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.
Thu 11/278:00 amCOS - SEA
1 stop7h 59mDelta
Thu 12/47:10 amSEA - COS
2 stops9h 09mDelta
Deal found 10/30$228
This United Airlines 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/256:20 pmCOS - SEA
1 stop5h 50mUnited Airlines
Sat 12/65:00 amSEA - COS
1 stop5h 18mUnited Airlines
Deal found 10/29$248
This United Airlines deal was found by Cheapflights users on 10/30. 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.
Thu 11/276:00 amCOS - SEA
1 stop5h 35mUnited Airlines
Thu 12/45:00 amSEA - COS
1 stop7h 08mUnited Airlines
Deal found 10/30$249
This Delta 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 11/156:02 pmCOS - SEA
1 stop6h 18mDelta
Tue 11/185:00 pmSEA - COS
1 stop4h 23mDelta
Deal found 10/29$277
This Southwest 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 11/155:25 amCOS - SEA
1 stop9h 50mSouthwest
Tue 11/183:05 pmSEA - COS
1 stop6h 20mSouthwest
Deal found 10/29$282
This American Airlines 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/254:37 pmCOS - SEA
1 stop9h 21mAmerican Airlines
Fri 12/512:31 amSEA - COS
1 stop8h 16mAmerican Airlines
Deal found 10/29$293
This American Airlines deal was found by Cheapflights users on 10/30. 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.
Fri 11/1412:45 pmCOS - SEA
1 stop9h 31mAmerican Airlines
Tue 11/1811:34 amSEA - COS
1 stop7h 53mAmerican Airlines
Deal found 10/30$296
This Delta deal was found by Cheapflights users on 10/30. 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.
Fri 11/148:00 amCOS - SEA
1 stop7h 59mDelta
Tue 11/1812:40 pmSEA - COS
2 stops8h 43mDelta
Deal found 10/30$302
This Delta deal was found by Cheapflights users on 10/30. 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.
Wed 11/196:02 pmCOS - SEA
1 stop6h 18mDelta
Fri 11/211:44 pmSEA - COS
1 stop7h 39mDelta
Deal found 10/30$308

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 October 30, 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

Wed 12/17

8:10 am-2:59 pm

1 stop7h 49m

Seattle/Tacoma Intl

Sun 1/11

5:25 am-11:17 am

1 stop4h 52m

$167

Colorado SpringsSeattle

COS - SEA

COSSEA

Colorado Springs

Tue 12/16

8:10 am-5:10 pm

2 stops10h 00m

Seattle/Tacoma Intl

Sun 1/18

5:25 am-11:17 am

1 stop4h 52m

$172

Colorado SpringsSeattle

COS - SEA

COSSEA

Colorado Springs

Sat 2/21

5:59 am-9:49 am

1 stop4h 50m

Seattle/Tacoma Intl

Wed 3/4

12:37 pm-11:45 pm

2 stops10h 08m

$242

Colorado SpringsSeattle

COS - SEA

COSSEA

Colorado Springs

Sun 3/1

6:00 am-10:20 am

1 stop5h 20m

Seattle/Tacoma Intl

Sat 3/7

11:10 am-7:15 pm

1 stop7h 05m

$268

Colorado SpringsSeattle

COS - SEA

COSSEA

Colorado Springs

Sat 11/15

6:02 pm-11:20 pm

1 stop6h 18m

Seattle/Tacoma Intl

Tue 11/18

5:00 pm-10:23 pm

1 stop4h 23m

$277

Colorado SpringsSeattle

COS - SEA

COSSEA

Colorado Springs

Sat 11/15

5:25 am-2:15 pm

1 stop9h 50m

Seattle/Tacoma Intl

Tue 11/18

3:05 pm-10:25 pm

1 stop6h 20m

$282

Colorado SpringsSeattle

COS - SEA

COSSEA

Colorado Springs

Sat 11/15

1:53 pm-8:51 pm

2 stops7h 58m

Seattle/Tacoma Intl

Tue 11/18

12:00 pm-5:40 pm

1 stop4h 40m

$282

Colorado SpringsSeattle

COS - SEA

COSSEA

Colorado Springs

Fri 11/14

12:45 pm-9:16 pm

1 stop9h 31m

Seattle/Tacoma Intl

Mon 11/17

12:41 am-9:53 am

1 stop8h 12m

$296

Colorado SpringsSeattle

COS - SEA

COSSEA

Colorado Springs

Thu 1/29

11:33 am-6:26 pm

1 stop7h 53m

Seattle/Tacoma Intl

Sun 2/1

5:00 am-10:57 am

1 stop4h 57m

$317

Colorado SpringsSeattle

COS - SEA

COSSEA

Colorado Springs

Thu 11/13

11:35 am-6:25 pm

2 stops7h 50m

Seattle/Tacoma Intl

Sun 11/16

5:05 am-10:53 am

1 stop4h 48m

$322

Flights are sorted by cheapest round-trip flights first.

Deals found on 10/30

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 October.
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 October 24, 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 $51). 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.

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 October 30, 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
4,243 reviews

Overall

8.0

Entertainment

7.5

Boarding

8.1

Food

7.0

Crew

8.6

Comfort

8.0

Reviews

1 / 20
2.0
Mediocre

Mike,Aug 2025

OKC - AUS

AC was not adequate, even on a night flight. WiFi subpar even for the airlines
Southwest
8.0
Very good
4,243 reviews
Southwest
8.0
Very good
4,243 reviews

Overall

8.0

Entertainment

7.5

Boarding

8.1

Food

7.0

Crew

8.6

Comfort

8.0

Reviews

1 / 20
2.0
Mediocre

Mike,Aug 2025

OKC - AUS

AC was not adequate, even on a night flight. WiFi subpar even for the airlines
Delta
7.9
Good
7,998 reviews
Southwest
8.0
Very good
4,243 reviews

Overall

8.0

Entertainment

7.5

Boarding

8.1

Food

7.0

Crew

8.6

Comfort

8.0

Reviews

1 / 20
2.0
Mediocre

Mike,Aug 2025

OKC - AUS

AC was not adequate, even on a night flight. WiFi subpar even for the airlines
United Airlines
7.4
Good
8,998 reviews
Southwest
8.0
Very good
4,243 reviews

Overall

8.0

Entertainment

7.5

Boarding

8.1

Food

7.0

Crew

8.6

Comfort

8.0

Reviews

1 / 20
2.0
Mediocre

Mike,Aug 2025

OKC - AUS

AC was not adequate, even on a night flight. WiFi subpar even for the airlines
American Airlines
7.2
Good
11,035 reviews
Southwest
8.0
Very good
4,243 reviews

Overall

8.0

Entertainment

7.5

Boarding

8.1

Food

7.0

Crew

8.6

Comfort

8.0

Reviews

1 / 20
2.0
Mediocre

Mike,Aug 2025

OKC - AUS

AC was not adequate, even on a night flight. WiFi subpar even for the airlines

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 4h 50m. 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 ($156), American Airlines ($186), and Southwest ($207) offers the cheapest pricing from Colorado Springs to Seattle. Delta is currently priced 56% below the average price you’ll pay for this route.

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

    $79 is the cheapest one-way deal found within the past few days, from Delta. You may also be able to find cheap deals on American Airlines and United Airlines, with prices starting from $88 and $119, 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 $51). 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
SeaTac
Tukwila
Tacoma
Lakewood
Olympia
Ocean Shores
Lynnwood
Edmonds
Leavenworth
Renton
Kirkland
Lacey
Kent
Federal Way
Cle Elum
Marysville
Puyallup
Chehalis
Fife
Issaquah

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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 October 30, 2025.
AirlineCheapestAverageFlexibilityOn-time
DeltaCheapest$156Average$341FlexibilityNo cancel feeOn-timeN/A
American AirlinesCheapest$186Average$238FlexibilityNo cancel feeOn-time71%
SouthwestCheapest$207Average$387FlexibilityNo cancel feeOn-time63%
United AirlinesCheapest$222Average$385FlexibilityNo cancel feeOn-time69%

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