Title: CA $137 Cheap Flights from Colorado Springs (COS) to Seattle (SEA) - Expedia.ca ![](https://images.trvl-media.com/place/178307/82efb684-8d05-4b09-b7ea-52d5ab4ea1ac.jpg?impolicy=fcrop&w=1200&h=500&q=medium) ![](https://images.trvl-media.com/place/178307/82efb684-8d05-4b09-b7ea-52d5ab4ea1ac.jpg?impolicy=fcrop&w=1200&h=500&q=medium) # CA $137 Cheap Flights from Colorado Springs (COS) to Seattle (SEA) [View CA $137 flight on Sat, Oct 18, 2025](https://expedia.ca/Flights-Search?trip=oneway&leg1=from:COS,to:SEA,departure:18/10/2025TANYT&passengers=children:0,adults:1,seniors:0,infantinlap:N&mode=search&options=sortby:price&paandi=true&flp=mdl:flights-flex-module,price:136.90&airProductToken=AQpvCjYIxJgBEgQzNzAwGMKTASDyEiiV3PoCMIPd-gI4RUAAWAFqCU1BSU5CQVNJQ3IIVkFWU0gzQkMKNQjEmAESBDI4MjMY8hIgkgEo2d36AjDi3voCOEVAAVgBaglNQUlOQkFTSUNyCFZBVlNIM0JDEgoIARABGAEqAkRMGAEiBAgBEAEoAigDKAQwAQ) - [Roundtrip](?flightType=roundtrip) - [One-way](?flightType=oneway) - [Multi-city](?flightType=multicity) ### Travellers Adults ChildrenAges 2 to 17 InfantsYounger than 2 EconomyPremium economyBusiness classFirst class Leaving from Going to Departing Returning Add a place to stay Add a car Direct flights only ## Popular airlines from Colorado Springs Municipal Airport (COS) to Seattle-Tacoma International Airport (SEA) - ![United](https://forever.travel-assets.com/flex/flexmanager/images/2024/09/23/landing_airline_sq_logo_UA.svg) United [](https://www.expedia.ca/Flights-Search?leg1=from:cos,to:sea,departure:13/10/2025TANYT&leg2=from:sea,to:cos,departure:20/10/2025TANYT&trip=roundtrip&passengers=adults:1,children:0,infantinlap:N&mode=search&pageId=0&filters=[{"preferredAirlineFilterValue":{"carrierCode":"UA"}}]) - ![American Airlines](https://forever.travel-assets.com/flex/flexmanager/images/2024/09/23/landing_airline_sq_logo_AA.svg) American Airlines [](https://www.expedia.ca/Flights-Search?leg1=from:cos,to:sea,departure:13/10/2025TANYT&leg2=from:sea,to:cos,departure:20/10/2025TANYT&trip=roundtrip&passengers=adults:1,children:0,infantinlap:N&mode=search&pageId=0&filters=[{"preferredAirlineFilterValue":{"carrierCode":"AA"}}]) - ![Delta](https://forever.travel-assets.com/flex/flexmanager/images/2024/09/23/landing_airline_sq_logo_DL.svg) Delta [](https://www.expedia.ca/Flights-Search?leg1=from:cos,to:sea,departure:13/10/2025TANYT&leg2=from:sea,to:cos,departure:20/10/2025TANYT&trip=roundtrip&passengers=adults:1,children:0,infantinlap:N&mode=search&pageId=0&filters=[{"preferredAirlineFilterValue":{"carrierCode":"DL"}}]) - ![Southwest Airlines](https://forever.travel-assets.com/flex/flexmanager/images/2024/09/23/landing_airline_sq_logo_WN.svg) Southwest Airlines [](https://www.expedia.ca/Flights-Search?leg1=from:cos,to:sea,departure:13/10/2025TANYT&leg2=from:sea,to:cos,departure:20/10/2025TANYT&trip=roundtrip&passengers=adults:1,children:0,infantinlap:N&mode=search&pageId=0&filters=[{"preferredAirlineFilterValue":{"carrierCode":"WN"}}]) ![notification illustration](https://a.travel-assets.com/travel-assets-manager/pictogram-bex/light__notification.svg) ### Be in the know Get alerts if flight prices drop or rise\* ![deals illustration](https://a.travel-assets.com/travel-assets-manager/pictogram-bex/light__deals.svg) ### Book smarter Save up to 30% on select hotels after you book a flight\* ![trophy illustration](https://a.travel-assets.com/travel-assets-manager/pictogram-bex/light__trophy.svg) ### Earn twice Earn your airline miles on top of our rewards [Sign in](https://www.expedia.ca/login) ## Cheap flights from Colorado Springs (COS) to Seattle (SEA) Prices were available within the past 7 days and start at CA $137 for one-way flights and for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply. All deals One way Roundtrip ## Find the cheapest month to fly from Colorado Springs (COS) to Seattle (SEA) ### September is typically the cheapest month to fly From CA $203 - CA $507 per traveller. Flight from Colorado Springs to Seattle (COS - SEA) route information | Origin airport | Colorado Springs | | --- | --- | | Destination airport | Seattle - Tacoma Intl. | | Distance | 1705 km | ## Colorado Springs to Seattle Flights **The easy way to book your flights from Colorado Springs to Seattle**  With Expedia, it’s simple to find and book flights to Seattle from Colorado Springs whether you’re traveling for business or pleasure. Enter your travel dates, hit search, and choose your flight from 20 airlines that cover this route. There are nonstop flights to Seattle - Tacoma Intl., too.   Choose your preferred carrier and cabin class with the advanced search tool and select your ideal departure time. Then, if you want, you can see just nonstop or refundable flights. And if you’re traveling last minute, just enter the date to check out flights from Colorado Springs to Seattle today, tomorrow, or this week.   **Save dollars with cheap flights from Colorado Springs, COS to Seattle - Tacoma Intl., SEA**  Sort your search results by price to find great deals on your flight from Colorado Springs to Seattle—you get all your cheapest options first. Grab yourself a bargain now—the lowest price on flights to Seattle from Colorado Springs currently is just rising to .   Here are more money-saving tips:  - Fly in when flight prices are normally at their lowest  - Book about a month to 6 weeks before you travel for the best prices to Seattle   - Avoid peak season and weekends when flights can cost more - Early morning and late-night flights are sometimes cheaper, so try varying your travel times  - One surefire way to save money on your flight is to book your flight and hotel together with Expedia. Sometimes, the savings are so large that the flight is basically free!  **Reasons to choose Expedia for your flight to Seattle from Colorado Springs**  Whatever your destination, budget, or reason to travel, in just one quick search, you can choose from loads of flights, airlines, and cabin classes. The filters make it quick and easy to find your ideal flights, and if you choose one of the flexible options, you won’t be charged to change your flight. So book your flight to Seattle with Expedia today. ## Frequently asked questions ### How much is a flight from City of Colorado Springs Municipal Airport to Sea-Tac Airport? > Round-trip tickets between City of Colorado Springs Municipal Airport and Sea-Tac Airport start from . This price is based on fares listed within the last 7 days on Expedia for flights departing within the next year — book now so you don't miss out. Prices and availability are subject to change. Additional terms apply. ### Do I need to pay a cancellation fee if I cancel my flight from City of Colorado Springs Municipal Airport to Sea-Tac Airport? > This can differ between airlines, as each one has its own terms and conditions. Visit the [Customer Service Portal](https://www.expedia.ca/helpcenter), where there are simple instructions on how to cancel your flight online. ### How do I find cheap flights from City of Colorado Springs Municipal Airport to Seattle - Tacoma Intl. Airport (SEA) that have flexible change policies? > Flights from COS to SEA offering flexible change policies are available from several carriers. Simply use our "No change fees" filter while searching. You'll only need to pay the cost difference between the two flights, without any additional fees to worry about. ### How many hours is the flight from COS to SEA? > The average flight between COS and Seattle - Tacoma Intl. Airport (SEA) is 6 hours and 1 minute. If you're travelling with kids, it's always a good idea to pack a few healthy snacks in your carry-on luggage. ### How far is the flight from Colorado Springs Airport (COS) to SEA? > It's around 1,700 kilometres between COS and Sea-Tac Airport, so expect to be flying for a while. Keep yourself occupied with things like playing cards (if you're travelling with friends) or a thrilling novel. ### Which airlines fly direct from Colorado Springs Airport (COS) to Sea-Tac Airport? > Flying directly between Colorado Springs Airport (COS) and Sea-Tac Airport isn't possible at present. However, you'll still be able to book a flight to SeaTac with at least one stop. ### Are Colorado Springs Airport (COS) to Sea-Tac Airport flight tickets cheaper when they're purchased at the last minute? > Last-minute planners can occasionally nab a bargain, with some super cheap airfares from Colorado Springs Airport (COS) to SEA cropping up a few weeks before the departure date. If you'd rather plan ahead, Expedia compares and updates the best flight deals continually — as early as 12 months in advance in some cases. 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