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$88+ 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 9/30. Fares are subject to change and may not be available on all flights or dates of travel.
COS — SEA
ago. 19 — ago. 261
mar. 8/19
mar. 8/26
1 adult, Economy
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Cheapflights Tip: The best prices from Colorado Springs to Seattle/Tacoma Intl are usually found in January or February, booked 23 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 agosto 14, 2025.

Round-trip from

$175
(American Airlines)

One-way from

$88
(Delta)

Popular in

November

Cheapest in

January

Average price

$361
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. 10% potential increase in price ($46 potential increase over avg. RT price).
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Cheapest flight prices on average. 2% potential price decrease ($8 potential savings vs. average RT price).
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Average for round-trip flights in August 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 agosto 14, 2025.

This Delta deal was found by Cheapflights users on 8/12. 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. 10/288:09 amCOS - SEA
1 stop7h 36mDelta
mar. 11/1111:25 amSEA - COS
1 stop4h 48mDelta
Deal found 8/12$175
This Southwest deal was found by Cheapflights users on 8/14. 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.
mié. 10/2211:35 amCOS - SEA
1 stop4h 30mSouthwest
lun. 10/275:15 amSEA - COS
1 stop7h 20mSouthwest
Deal found 8/14$187
This Southwest deal was found by Cheapflights users on 8/14. 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.
jue. 9/186:55 pmCOS - SEA
1 stop6h 20mSouthwest
lun. 9/2210:45 pmSEA - COS
2 stops13h 55mSouthwest
Deal found 8/14$210
This Southwest deal was found by Cheapflights users on 8/14. 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.
vie. 9/193:30 pmCOS - SEA
1 stop5h 25mSouthwest
lun. 9/2210:45 pmSEA - COS
2 stops13h 55mSouthwest
Deal found 8/14$219
This United Airlines deal was found by Cheapflights users on 8/14. 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.
mié. 9/106:25 pmCOS - SEA
1 stop5h 34mUnited Airlines
dom. 9/145:02 amSEA - COS
1 stop7h 12mUnited Airlines
Deal found 8/14$227
This Delta deal was found by Cheapflights users on 8/13. 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.
lun. 9/85:55 pmCOS - SEA
1 stop5h 19mDelta
vie. 9/1212:45 pmSEA - COS
2 stops8h 26mDelta
Deal found 8/13$233
This Southwest deal was found by Cheapflights users on 8/14. 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.
mié. 10/225:30 pmCOS - SEA
1 stop7h 15mSouthwest
dom. 10/265:00 amSEA - COS
1 stop5h 10mSouthwest
Deal found 8/14$236
This United Airlines deal was found by Cheapflights users on 8/14. 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.
jue. 9/116:25 pmCOS - SEA
1 stop5h 34mUnited Airlines
dom. 9/145:02 amSEA - COS
1 stop7h 12mUnited Airlines
Deal found 8/14$243
This Southwest deal was found by Cheapflights users on 8/12. 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.
jue. 9/253:30 pmCOS - SEA
1 stop5h 25mSouthwest
dom. 9/2811:10 pmSEA - COS
1 stop9h 00mSouthwest
Deal found 8/12$248

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 agosto 14, 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

mar. 10/28

12:09 pm-7:27 pm

1 stop8h 18m

Seattle/Tacoma Intl

lun. 11/10

12:59 am-11:45 am

1 stop9h 46m

$175

Colorado SpringsSeattle

COS - SEA

COSSEA

Colorado Springs

mar. 10/28

8:09 am-2:45 pm

1 stop7h 36m

Seattle/Tacoma Intl

mar. 11/11

11:25 am-5:13 pm

1 stop4h 48m

$175

Colorado SpringsSeattle

COS - SEA

COSSEA

Colorado Springs

mié. 10/22

11:35 am-3:05 pm

1 stop4h 30m

Seattle/Tacoma Intl

lun. 10/27

5:15 am-1:35 pm

1 stop7h 20m

$187

Colorado SpringsSeattle

COS - SEA

COSSEA

Colorado Springs

sáb. 11/8

8:09 am-2:45 pm

1 stop7h 36m

Seattle/Tacoma Intl

mar. 11/11

4:55 pm-10:29 pm

1 stop4h 34m

$187

Colorado SpringsSeattle

COS - SEA

COSSEA

Colorado Springs

jue. 9/18

6:55 pm-12:15 am

1 stop6h 20m

Seattle/Tacoma Intl

lun. 9/22

10:45 pm-1:40 pm

2 stops13h 55m

$210

Colorado SpringsSeattle

COS - SEA

COSSEA

Colorado Springs

vie. 9/19

3:30 pm-7:55 pm

1 stop5h 25m

Seattle/Tacoma Intl

lun. 9/22

10:45 pm-1:40 pm

2 stops13h 55m

$219

Colorado SpringsSeattle

COS - SEA

COSSEA

Colorado Springs

mié. 9/10

6:25 pm-10:59 pm

1 stop5h 34m

Seattle/Tacoma Intl

dom. 9/14

5:02 am-1:14 pm

1 stop7h 12m

$227

Colorado SpringsSeattle

COS - SEA

COSSEA

Colorado Springs

lun. 9/8

5:55 pm-10:14 pm

1 stop5h 19m

Seattle/Tacoma Intl

vie. 9/12

12:45 pm-10:11 pm

2 stops8h 26m

$233

Colorado SpringsSeattle

COS - SEA

COSSEA

Colorado Springs

mar. 9/30

8:15 am-2:39 pm

1 stop7h 24m

$88

Colorado SpringsSeattle

COS - SEA

COSSEA

Colorado Springs

mié. 11/19

12:45 pm-7:14 pm

1 stop7h 29m

$88

Flights are sorted by cheapest round-trip flights first.

Deals found on 8/13

Showing 1-10 of 17 results
1
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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 August 8, 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 23 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, January is the cheapest month in which you can book a flight from Colorado Springs to Seattle (average of $238). Flying from Colorado Springs to Seattle in June is currently the most expensive (average of $389). 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 agosto 14, 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
4,244 reviews

Crew

8.6

Comfort

8.0

Overall

8.0

Entertainment

7.5

Boarding

8.1

Food

7.0

Reviews

1 / 20
8.0
Excellent

Walter,Aug 2025

OAK - SAN

Dozens of flights and I've never seen a row's beverages forgotten. I even went back and asked the attendant to check on them and nothing. I really hope it didn't have something to do with the Black mother with her kid in the row. Otherwise it was a typical Southwest flight, rapid boarding, tolerable leg room.
Southwest
8.0
Very good
4,244 reviews
Southwest
8.0
Very good
4,244 reviews

Crew

8.6

Comfort

8.0

Overall

8.0

Entertainment

7.5

Boarding

8.1

Food

7.0

Reviews

1 / 20
8.0
Excellent

Walter,Aug 2025

OAK - SAN

Dozens of flights and I've never seen a row's beverages forgotten. I even went back and asked the attendant to check on them and nothing. I really hope it didn't have something to do with the Black mother with her kid in the row. Otherwise it was a typical Southwest flight, rapid boarding, tolerable leg room.
Delta
8.0
Very good
7,980 reviews
Southwest
8.0
Very good
4,244 reviews

Crew

8.6

Comfort

8.0

Overall

8.0

Entertainment

7.5

Boarding

8.1

Food

7.0

Reviews

1 / 20
8.0
Excellent

Walter,Aug 2025

OAK - SAN

Dozens of flights and I've never seen a row's beverages forgotten. I even went back and asked the attendant to check on them and nothing. I really hope it didn't have something to do with the Black mother with her kid in the row. Otherwise it was a typical Southwest flight, rapid boarding, tolerable leg room.
United Airlines
7.4
Good
8,916 reviews
Southwest
8.0
Very good
4,244 reviews

Crew

8.6

Comfort

8.0

Overall

8.0

Entertainment

7.5

Boarding

8.1

Food

7.0

Reviews

1 / 20
8.0
Excellent

Walter,Aug 2025

OAK - SAN

Dozens of flights and I've never seen a row's beverages forgotten. I even went back and asked the attendant to check on them and nothing. I really hope it didn't have something to do with the Black mother with her kid in the row. Otherwise it was a typical Southwest flight, rapid boarding, tolerable leg room.
American Airlines
7.2
Good
10,000 reviews
Southwest
8.0
Very good
4,244 reviews

Crew

8.6

Comfort

8.0

Overall

8.0

Entertainment

7.5

Boarding

8.1

Food

7.0

Reviews

1 / 20
8.0
Excellent

Walter,Aug 2025

OAK - SAN

Dozens of flights and I've never seen a row's beverages forgotten. I even went back and asked the attendant to check on them and nothing. I really hope it didn't have something to do with the Black mother with her kid in the row. Otherwise it was a typical Southwest flight, rapid boarding, tolerable leg room.

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.

  • What are the cheapest airlines flying from Colorado Springs to Seattle round-trip?

    According to our current data, Delta ($182), American Airlines ($206), and Southwest ($232) offers the cheapest pricing from Colorado Springs to Seattle. Delta is currently priced 51% below the average price you’ll pay for this route.

  • 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, January is the cheapest month in which you can book a flight from Colorado Springs to Seattle (average of $238). Flying from Colorado Springs to Seattle in June is currently the most expensive (average of $389). 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
Ocean Shores
Lakewood
Lynnwood
Lacey
Leavenworth
Renton
Olympia
Puyallup
Kent
Cle Elum
Chehalis
Kirkland
Issaquah
Aberdeen
Shoreline
Federal Way
Shelton

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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 agosto 14, 2025.
AirlineCheapestAverageFlexibilityOn-time
DeltaCheapest$182Average$378FlexibilityNo cancel feeOn-timeN/A
American AirlinesCheapest$206Average$305FlexibilityNo cancel feeOn-time71%
SouthwestCheapest$232Average$395FlexibilityNo cancel feeOn-time63%
United AirlinesCheapest$244Average$385FlexibilityNo cancel feeOn-time69%

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