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$129+ 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 8/17. Fares are subject to change and may not be available on all flights or dates of travel.
COS — SEA
Aug 23 — Aug 301
Sun 8/23
Sun 8/30
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 July 24, 2026.

This Southwest deal was found by Cheapflights users on 7/20. 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 8/1511:35 am
COS
-
SEA
1 stop7h 40m
Southwest
Sat 8/225:30 am
SEA
-
COS
1 stop5h 40m
Southwest
Deal found 7/20$257
This Southwest deal was found by Cheapflights users on 7/22. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/2912:50 pm
COS
-
SEA
1 stop11h 05m
Southwest
Wed 9/912:40 pm
SEA
-
COS
1 stop5h 25m
Southwest
Deal found 7/22$262
This Delta deal was found by Cheapflights users on 7/22. 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.
Wed 8/128:10 am
COS
-
SEA
2 stops9h 27m
Delta
Tue 8/187:16 am
SEA
-
COS
2 stops9h 20m
Delta
Deal found 7/22$267
This Delta deal was found by Cheapflights users on 7/21. 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.
Wed 8/128:10 am
COS
-
SEA
1 stop5h 49m
Delta
Wed 8/1912:36 pm
SEA
-
COS
2 stops8h 52m
Delta
Deal found 7/21$272
This United Airlines deal was found by Cheapflights users on 7/20. 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.
Sun 9/66:00 am
COS
-
SEA
1 stop5h 01m
United Airlines
Wed 9/95:00 am
SEA
-
COS
1 stop4h 44m
United Airlines
Deal found 7/20$277
This Southwest deal was found by Cheapflights users on 7/21. 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.
Fri 8/286:45 pm
COS
-
SEA
1 stop6h 35m
Southwest
Mon 8/319:10 am
SEA
-
COS
1 stop6h 20m
Southwest
Deal found 7/21$283
This Southwest deal was found by Cheapflights users on 7/19. 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.
Sun 8/237:30 pm
COS
-
SEA
1 stop6h 20m
Southwest
Wed 9/212:40 pm
SEA
-
COS
1 stop5h 25m
Southwest
Deal found 7/19$287
This Southwest deal was found by Cheapflights users on 7/22. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 8/285:10 pm
COS
-
SEA
1 stop8h 30m
Southwest
Sat 9/51:35 pm
SEA
-
COS
1 stop5h 30m
Southwest
Deal found 7/22$288
This Southwest deal was found by Cheapflights users on 7/20. 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.
Fri 10/305:30 am
COS
-
SEA
1 stop7h 15m
Southwest
Mon 11/22:35 pm
SEA
-
COS
1 stop8h 10m
Southwest
Deal found 7/20$291

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 July 24, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$257
(Southwest)

One-way from

$129
(Southwest)

Popular in

June

Cheapest in

January

Average price

$459
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
Highest demand for flights based on searches. 16% potential increase in price ($73 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease ($14 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in July 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 July 24, 2026.
Use the filters below to find and compare flights from Colorado Springs to Seattle that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

Colorado SpringsSeattle

COS - SEA

COSSEA

Colorado Springs

Tue 9/22

10:05 am-4:50 pm

1 stop7h 45m

Seattle/Tacoma Intl

Tue 9/29

6:25 am-12:35 pm

1 stop5h 10m

$257

Colorado SpringsSeattle

COS - SEA

COSSEA

Colorado Springs

Sun 9/6

6:00 am-10:01 am

1 stop5h 01m

Seattle/Tacoma Intl

Wed 9/9

3:30 pm-11:55 pm

2 stops7h 25m

$262

Colorado SpringsSeattle

COS - SEA

COSSEA

Colorado Springs

Wed 9/2

5:20 pm-11:25 pm

1 stop7h 05m

Seattle/Tacoma Intl

Fri 9/11

9:05 am-4:30 pm

1 stop6h 25m

$262

Colorado SpringsSeattle

COS - SEA

COSSEA

Colorado Springs

Wed 10/21

6:30 am-1:35 pm

2 stops8h 05m

Seattle/Tacoma Intl

Sat 10/24

11:40 am-9:30 pm

2 stops8h 50m

$267

Colorado SpringsSeattle

COS - SEA

COSSEA

Colorado Springs

Sun 8/23

7:30 pm-12:50 am

1 stop6h 20m

Seattle/Tacoma Intl

Tue 8/25

7:10 am-3:40 pm

1 stop7h 30m

$292

Colorado SpringsSeattle

COS - SEA

COSSEA

Colorado Springs

Tue 8/4

8:10 am-2:50 pm

1 stop7h 40m

Seattle/Tacoma Intl

Wed 8/12

12:36 pm-10:28 pm

2 stops8h 52m

$313
Quickest round-trip

Colorado SpringsSeattle

COS - SEA

COSSEA

Colorado Springs

Thu 9/3

5:30 am-10:01 am

1 stop5h 31m

Seattle/Tacoma Intl

Sun 9/6

5:00 am-10:30 am

1 stop4h 30m

$314

Colorado SpringsSeattle

COS - SEA

COSSEA

Colorado Springs

Sun 8/23

7:30 pm-12:50 am

1 stop6h 20m

Seattle/Tacoma Intl

Wed 9/2

7:10 am-4:00 pm

2 stops7h 50m

$332

Colorado SpringsSeattle

COS - SEA

COSSEA

Colorado Springs

Thu 9/3

2:15 pm-7:35 pm

1 stop6h 20m

Seattle/Tacoma Intl

Thu 9/10

9:05 am-4:30 pm

1 stop6h 25m

$333

Colorado SpringsSeattle

COS - SEA

COSSEA

Colorado Springs

Wed 10/7

5:08 pm-10:59 pm

1 stop6h 51m

Seattle/Tacoma Intl

Sun 10/11

6:05 pm-11:59 pm

1 stop4h 54m

$353

Flights are sorted by cheapest round-trip flights first.

Deals found on 7/22

Showing 1-10 of 19 resultsSorted by cheapest first
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 July.
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?

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 59 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 $224). Flying from Colorado Springs to Seattle in June is currently the most expensive (average of $530). 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?

Airfare is below average for this route at the moment.

Colorado Springs to Seattle flights typically cost between $348 and $477 in August.
The cheapest round-trip price found within the last 5 days was $257 on Southwest (Aug 15-Aug 22).

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 July 24, 2026.
Peruse reviews from past customers who have flown with Southwest,Delta, andUnited 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
4,234 reviews

Entertainment

7.5

Crew

8.6

Boarding

8.1

Comfort

8.0

Food

7.0

Overall

8.0

Reviews

1 / 20
8.0
Excellent

Anonymous,Feb 2026

DEN - BDL

Weird they cancelled a direct and rerouted me on a connecting flight to get in 10 hours later. What was the point? Crew and flight were great, but not sure what's going on with Southwest.
Southwest
8.0
Very good
4,234 reviews
Southwest
8.0
Very good
4,234 reviews

Entertainment

7.5

Crew

8.6

Boarding

8.1

Comfort

8.0

Food

7.0

Overall

8.0

Reviews

1 / 20
8.0
Excellent

Anonymous,Feb 2026

DEN - BDL

Weird they cancelled a direct and rerouted me on a connecting flight to get in 10 hours later. What was the point? Crew and flight were great, but not sure what's going on with Southwest.
Delta
7.8
Good
8,482 reviews
Southwest
8.0
Very good
4,234 reviews

Entertainment

7.5

Crew

8.6

Boarding

8.1

Comfort

8.0

Food

7.0

Overall

8.0

Reviews

1 / 20
8.0
Excellent

Anonymous,Feb 2026

DEN - BDL

Weird they cancelled a direct and rerouted me on a connecting flight to get in 10 hours later. What was the point? Crew and flight were great, but not sure what's going on with Southwest.
United Airlines
7.4
Good
10,029 reviews
Southwest
8.0
Very good
4,234 reviews

Entertainment

7.5

Crew

8.6

Boarding

8.1

Comfort

8.0

Food

7.0

Overall

8.0

Reviews

1 / 20
8.0
Excellent

Anonymous,Feb 2026

DEN - BDL

Weird they cancelled a direct and rerouted me on a connecting flight to get in 10 hours later. What was the point? Crew and flight were great, but not sure what's going on with Southwest.

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 01m. 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 ($137), Southwest ($186), and United Airlines ($217) offers the cheapest pricing from Colorado Springs to Seattle. Delta is currently priced 64% 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 $110, 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, January is the cheapest month in which you can book a flight from Colorado Springs to Seattle (average of $224). Flying from Colorado Springs to Seattle in June is currently the most expensive (average of $530). 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
Tacoma
Renton
Lacey
Leavenworth
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Tukwila
Centralia
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Issaquah

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Top 3 airlines flying from Colorado Springs to Seattle

Discover the top 3 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 July 24, 2026.
AirlineCheapestAverageFlexibilityOn-time
DeltaCheapest$137Average$307FlexibilityNo cancel feeOn-timeN/A
SouthwestCheapest$186Average$417FlexibilityNo cancel feeOn-time63%
United AirlinesCheapest$217Average$377FlexibilityNo cancel feeOn-time69%

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