COS - SEA

$80 Find Cheap Flights from Colorado Springs to Seattle

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight from Colorado Springs to Seattle departing on 8/26. Fares are subject to change and may not be available on all flights or dates of travel. Click the price to replicate the search for this deal.
1 adult
1 adult, Economy

KAYAK searches hundreds of travel sites at once for deals on flights to Seattle

 
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Colorado Springs to Seattle, as well as popular online travel agencies
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Colorado Springs to Seattle, as well as popular online travel agencies
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Flights Deals

Cheap Flights from Colorado Springs to Seattle (COS-SEA)

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from Colorado Springs to Seattle that are departing in the next months. While these flights were available on KAYAK in the last 72 hours, prices and availability are subject to change and deals may expire.
Discover the best prices for you by selecting your travel dates on KAYAK.

Recent round-trip flight deals from Colorado Springs to Seattle

Fri, Aug 15 - Mon, Aug 18
Southwest Logo
6:55 pm - 12:15 amCOS-SEA
6h 20m1 stop
Southwest Logo
6:30 am - 2:55 pmSEA-COS
7h 25m1 stop
$161Southwest
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Sat, Sep 20 - Tue, Sep 23
Southwest Logo
5:00 pm - 10:30 pmCOS-SEA
6h 30m1 stop
Southwest Logo
5:35 am - 4:10 pmSEA-COS
9h 35m1 stop
$188Southwest
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Thu, Jul 31 - Wed, Aug 6
Delta Logo
5:55 pm - 10:22 pmCOS-SEA
5h 27m1 stop
Delta Logo
1:30 pm - 10:13 pmSEA-COS
7h 43m1 stop
$198Delta
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Mon, Aug 11 - Mon, Aug 18
Southwest Logo
3:30 pm - 7:55 pmCOS-SEA
5h 25m1 stop
Southwest Logo
6:30 am - 2:55 pmSEA-COS
7h 25m1 stop
$199Southwest
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Thu, Aug 28 - Tue, Sep 2
American Airlines Logo
5:07 pm - 12:54 amCOS-SEA
8h 47m1 stop
American Airlines Logo
11:30 pm - 10:11 amSEA-COS
9h 41m1 stop
$208American Airlines
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Fri, Aug 29 - Sat, Sep 6
Delta Logo
5:55 pm - 10:15 pmCOS-SEA
5h 20m1 stop
Delta Logo
9:40 am - 5:15 pmSEA-COS
6h 35m1 stop
$227Delta
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Fri, Jul 18 - Tue, Jul 22
Delta Logo
5:55 pm - 11:59 pmCOS-SEA
7h 04m1 stop
Delta Logo
12:15 pm - 10:13 pmSEA-COS
8h 58m2 stops
$232Delta
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Fri, Oct 3 - Sat, Oct 11
American Airlines Logo
6:02 am - 2:48 pmCOS-SEA
9h 46m1 stop
American Airlines Logo
5:46 am - 3:37 pmSEA-COS
8h 51m1 stop
$272American Airlines
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Tue, Jul 15 - Sat, Jul 19
United Airlines Logo
5:20 pm - 10:59 pmCOS-SEA
6h 39m1 stop
United Airlines Logo
6:45 am - 5:20 pmSEA-COS
9h 35m2 stops
$302United Airlines
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Tue, Jul 15 - Sat, Jul 19
United Airlines Logo
5:30 am - 1:46 pmCOS-SEA
9h 16m2 stops
United Airlines Logo
6:45 am - 5:20 pmSEA-COS
9h 35m2 stops
$307United Airlines
Find Deal
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KAYAK's insights & trends for Colorado Springs to Seattle flights

Get data-powered insights and trends into flights from Colorado Springs to Seattle to help you find the cheapest flights, the best time to fly and much more.

What’s the cheapest day of the week to fly from Colorado Springs to Seattle?

The average price of all round-trip flights from Colorado Springs to Seattle clicked on KAYAK for each day over the last 12 months.

Your flight ticket price will generally be cheaper if you fly to Seattle on a Thursday and more expensive on a Sunday. On your return trip to Colorado Springs, you should consider flying back on a Wednesday, and avoid Sundays for better deals.

What is the cheapest month to fly from Colorado Springs to Seattle?

To calculate monthly average prices, KAYAK takes all prices for each month over the last year for round-trip flights from Colorado Springs to Seattle, removes the top 0.1% to account for outliers, and then takes the median of all values for each month.

The cheapest month for flights from Colorado Springs to Seattle is January, where tickets cost $206 (return) on average. On the other hand, the most expensive months are July and November, where the average cost of round-trip tickets is $472 and $449 respectively.

How far in advance should I book a flight from Colorado Springs to Seattle?

To calculate weekly average prices, KAYAK takes all prices for each week before departure over the last year for round-trip flights from Colorado Springs to Seattle, removes the top 0.1% to account for outliers, and then takes the average of all the values for each week.

To get a below average price on the flight from Colorado Springs to Seattle, you should book around 4 weeks before departure. For the absolute cheapest price, our data suggests you should book 17 weeks before departure.

Good to know

Low seasonJanuary
High seasonJuly
Cheapest flight$80
Best time to beat the crowds with an average 46% drop in price.
Most popular time to fly with an average 23% increase in price.
Flight from Colorado Springs to Seattle

When to book flights from Colorado Springs to Seattle

Are your dates flexible? Find out the best times to travel from Colorado Springs to Seattle based on our flight data from the last year. Discover the cheapest month and even day to fly.
Estimated round-trip price
KAYAK looks at all historical flight data for each date to provide a predicted price for one-way trips or round-trips with a duration up to 40 days. While we try to provide actual minimum prices for each date, some prices are predictions and actual prices may differ.

FAQs for booking flights from Colorado Springs to Seattle

  • What is the cheapest flight from Colorado Springs to Seattle?

    In the last 3 days, the lowest price for a flight from Colorado Springs to Seattle was $80 for a one-way ticket and $161 for a round-trip.

  • Do I need a passport to fly between Colorado Springs and Seattle?

    Even though you are not required to have a passport, keep in mind that an official ID is needed to board the airplane.

  • Which aircraft models fly most regularly from Colorado Springs to Seattle?

    We unfortunately don’t have that data for this specific route.

  • Which airline alliances offer flights from Colorado Springs to Seattle?

    SkyTeam, Star Alliance, and oneworld are the airline alliances operating flights between Colorado Springs and Seattle, with SkyTeam being the most commonly used for this route.

  • What is the most popular layover when flying to Seattle from Colorado Springs?

    Denver is the most popular layover city among KAYAK users traveling from Colorado Springs to Seattle.

  • Which is the best airline for flights from Colorado Springs to Seattle, Southwest or Delta?

    The two airlines most popular with KAYAK users for flights from Colorado Springs to Seattle are Southwest and Delta. With an average price for the route of $445 and an overall rating of 8.0, Southwest is the most popular choice. Delta is also a great choice for the route, with an average price of $462 and an overall rating of 8.0.

  • How does KAYAK find such low prices on flights from Colorado Springs to Seattle?

    KAYAK is a travel search engine. That means we look across the web to find the best prices we can find for our users. With over 2 billion flight queries processed yearly, we are able to display a variety of prices and options on flights from Colorado Springs to Seattle.

  • How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from Colorado Springs to Seattle?

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to Seattle from Colorado Springs is likely to change within 7 days, so travelers know whether to wait or book now.

  • What is the Hacker Fare option on flights from Colorado Springs to Seattle?

    Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional round-trip ticket. You could then fly to Seattle with an airline and back to Colorado Springs with another airline. Booking your flights between Colorado Springs and SEA can sometimes prove cheaper using this method.

  • What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from Colorado Springs to Seattle?

    Sometimes travel dates aren't set in stone. If your preferred travel dates have some wiggle room, flexible dates will show you all the options when flying to Seattle from Colorado Springs up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

Top 4 airlines serving from Colorado Springs to Seattle

 
See real verified KAYAK customer reviews for airlines flying from Colorado Springs to Seattle. Airline scores are aggregated from all reviews left by passengers on KAYAK after flying with an airline. KAYAK doesn’t show reviews that are older than 5 years. Learn how KAYAK collects reviews.
Need help choosing which airline to fly with from Colorado Springs to Seattle? KAYAK airline reviews give an overall score for each airline based on loads of factors, including comfort, boarding, in-flight entertainment and more, to make your decision easier. See airline scores according to verified KAYAK customer reviews.
8.0
SouthwestOverall score based on 4287 reviews
8.2Boarding
7.1Food
8.6Crew
8.0Comfort
7.6Entertainment
Airline reviews

Southwest is typically delayed, and it gets wearisome. It is no longer a discount airline and you get way less than you pay for when it comes to comfort and Ce.

6.0 GoodDavid, Jun 2025BWI - COS
Read more Southwest reviews

Southwest is typically delayed, and it gets wearisome. It is no longer a discount airline and you get way less than you pay for when it comes to comfort and Ce.

We sat on the plane on the tarmac for 4 hours.

I'm not a fan of Southwest's model. I don't like the herding style of boarding.

Flight crew and cabin crew were great. I had to rearrange flights because my original flight was 3hrs delayed for weather, the rub is the flight I moved to boarded on time then we sat at the gate for 2 hours because scheduling stole our first officer for another flight, TWICE. Then our actual FO was an hour delayed. To make it worse my original flight went from a 3 hour delay to departing 15min EARLY. Just poor scheduling operations all around.

Bring back peanuts Take our drink orders when were all seated, especially after you switch to assigned seating.

Staff was far less than helpful at all times. Departure and arrival times mean nothing to Southwest. Extremely disappointed, will never fly with them again, and I’ll be sure to share my experience with all.

It is southwest seat was ok. Not the most comfortable seat

I’ve always loved Southwest. No issues at all. I was flying standby and the gate agent was extremely friendly and helpful. Boarding was smooth and I was able to get a window seat in the emergency exit row. Crew was fantastic! They were very professional and accommodating. We had to divert from our destination due to weather but the flight crew kept everyone at ease and informed us of all pertinent information. Excellent flight

The price of the tickets isn't matching the flight experience. No matter how long the flight is, you're only getting pretzels. The flight attendants looked unkept and over it.

Plz don't take away free bags and free seating

Great overall. There was a bit of turbulence so they could only serve water because too much turbulence for the carts. Was glad they prioritized safety though

Excellent flight, the planes were newer, they did a nice job with boarding, great service overall.

Great service. Flight was delayed while we sat on the runway for a couple of hours. Weather related. Staff made is very bearable. The steward servicing the first class cabin was exceptional. Thank you! 💗

5 hours of delay that could've been much shorter if Delta had taken the 1 hour delay they imposed on the flight before boarding to run any of the plane checks required for flight to find the hydraulic issue that required nearly 3 hours to fix. $24 of meal credit buys a sandwich and a soft drink. Poor communication within the terminal about what gate we'd be re-boarding from and when we'd be re-boarding.

Amazing flight! I have never noticed the uniforms of the attendants before in twenty years of flying except today when one female had the most amazing dress on. It was beautifully designed and showed she was in charge. I never dreamed I would google who designed Delta uniforms . The ultimate compliment is when another woman admires your outfit. . I hope your designer puts it on the market

It would be nice if was given wires ear buds. Overall was a good experience was able to sleep on the plane

My flight was 6 pm 6/6. Every hour they delayed it again - air condition issues then no pilot then the crew had worked too many hours and cancelled the flight at 11 pm. Sent customers to NJ a 45 minutes uber ride to a hotel. Had to be back by 5 am for a 7 am flight and again no pilot etc with another three hours of delays.

The entertainment and wifi mostly didn't work on this flight.

Terrible entertainment system - kept freezing and audio kept cutting out. Snacks were mediocre at best for a 5 hour flight.

The check in and bag drop off for Sky Priority members is slow. The Clear security was also slow - a TSA issue.

it was so bad. I tried to board my flight from vancouver to saskatoon. And to my surprise they did not board me cause the flight was changed and no email was send to me. and on my boarding pass which i got from seattle says different flight. I did not knew anyone from Vancouver, air canada crew was rude, i asked for today flight but they were rude and i had early morning dental appointment in saskatoon. I was so much in pain and my whole day is wasted today. and i suffered alot. They did provide me hotel but they did not provide me any food. I am really really disappointed first time had so bad experience with air canada. I may think twice to book it again. If i can get any reply or any composition that would be great. Thanks

Impressed with the service despite turbulence because of the weather. Both flights arrived before their scheduled times.

Great experience…left a bit behind schedule but made up fir that in the air and landed 10 minutes early 😁

Electric plugs didn't work. Entertainment system wasn't working

The design of the light switch on the arm rest is ridiculous.

leg space better than expected. two washrooms for one plane isn't enough.

The gate attendant let me walk right by her with a bag too big for the overhead compartment

Overall poor for me I paid extra for seats with leg room and my regional flights exit row seats have less leg room then the others that's money that could have been saved and on my final flight home the flights air was not operating it was unbearably hot in the cabin I will be contacting United and filing a DOT complaint

I don’t understand the purpose of the orange “priority” tag on my bag. This tagged, my bag is last or near to the last bag to come down the carousel at IAH.

The seats on this flight were almost roomy enough to be the basic amount needed for human existence. I think my favorite part of this flight was it landed at an A gate, which was the most palatial part of Sea-Tac I've ever seen - a massive improvement from the S gates.

5.5 hour delay with no explanation on why, along with no proactive effort to reaccomodate me.

It was one of my worst flight ever. First they were changing the gate for at least 4 times, changing from gate D7 to D12 to D44. Considering the size of the Miami Airport, we are talking about long distance and the train at the airport was not working. Then the flight was delayed around one hour. Then finally we boarded into the plane and when everybody was seated, there was an announcement that there is an issue with one of the tire of the plane, so we all had to get out of the plane with our belongings, to replace the tire. So we had around 2.5-hour delay

Most miserable flight ever. We waited almost 2 hours on the runway because the flight was oversold. American offered $1200 credit. Then there was some nonsense about weight distribution. Ridiculous. No food for 8 plus hours on the flight. I will be writing a letter.

Honestly, I haven’t flown American in years, probably due to the pandemic and my being unable to travel for certain periods in the last two years, but it was a good experience to dig out or obtain a new American Airlines account after many years of traveling for business with American in the past.

The plane was probably full boarding was easy. We were able to check our carry-on luggage for free. It was a return flight through Philly to LA. Never saw a stewardess do a demonstration of emergency Procedures. I think my flight was pretty full

Plane, flight, crew, captain were all great. The first flight had a Chipotle box lunch...delicious.

Plane, flight, crew, captain were all great. The first flight had a Chipotle box lunch...delicious. this return flight not as tasty, but filling.

The flight was 2 hour delayed, otherwise everything was excellent. The delay was due to the hourly limit requirement so given that as a reason, I'm happy with the flight!

Weather delay for 2.5 hours followed by half hour crew delay, did not have ginger ale, uncomfortable seats

So awful Unreliable Unfriendly Bad Mad Mean Smelly Hot Late Overbooked Understaffed Expensive Cramped Narcs If they were a fruit they’d be rotten durian

Everything you need to know for your flight from Colorado Springs to Seattle

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