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COS - SEA

Find cheap flights from Colorado Springs to Seattle from $128

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 6/11. 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
0 bags
Sat 5/25
Sat 6/1

Search 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
In the last 7 days travelers have searched 45,119,101 times on KAYAK, and here is why:

Save 22% or moreCompare multiple travel sites with one search.

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Cheap flight deals 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 and deals for you by selecting your travel dates.
Choose your dates
11:30 am - 8:06 pmCOS-SEA
9h 36m1 stop
12:30 am - 10:40 amSEA-COS
9h 10m1 stop
$218Delta
Find Deal
Fri, Oct 4 - Sat, Oct 5
5:01 pm - 12:55 amCOS-SEA
8h 54m1 stop
5:43 am - 1:19 pmSEA-COS
6h 36m1 stop
$247American Airlines
Find Deal
Tue, Aug 20 - Sat, Aug 24
10:51 am - 8:50 pmCOS-SEA
10h 59m2 stops
1:15 am - 10:00 amSEA-COS
7h 45m1 stop
$252American Airlines
Find Deal
Tue, May 14 - Fri, May 17
10:51 am - 7:21 pmCOS-SEA
9h 30m1 stop
1:15 am - 10:00 amSEA-COS
7h 45m1 stop
$273American Airlines
Find Deal
Fri, May 10 - Sun, May 12
10:51 am - 7:21 pmCOS-SEA
9h 30m1 stop
11:10 pm - 10:00 amSEA-COS
9h 50m1 stop
$289American Airlines
Find Deal
Fri, May 10 - Mon, May 13
6:00 am - 9:47 amCOS-SEA
4h 47m1 stop
5:00 am - 10:33 amSEA-COS
4h 33m1 stop
$310United Airlines
Find Deal
Sat, May 4 - Sun, May 5
7:05 pm - 8:02 amCOS-SEA
13h 57m1 stop
5:10 pm - 5:39 pmSEA-COS
23h 29m1 stop
$325Sun Country Air
Find Deal
Sun, Jun 9 - Sat, Jun 15
8:20 am - 4:40 pmCOS-SEA
9h 20m1 stop
12:40 am - 10:21 amSEA-COS
8h 41m1 stop
$335Delta
Find Deal
Tue, Jul 9 - Mon, Jul 15
4:30 pm - 10:50 pmCOS-SEA
7h 20m1 stop
2:22 pm - 8:37 pmSEA-COS
5h 15m1 stop
$343United Airlines
Find Deal
Tue, Jun 18 - Tue, Jun 25
7:05 pm - 8:02 amCOS-SEA
13h 57m1 stop
9:08 am - 5:39 pmSEA-COS
7h 31m1 stop
$345Sun Country Air
Find Deal
Sun, Jun 9 - Sun, Jun 16

Flights from Colorado Springs to Seattle - Travel Insights & Trends

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 flights from Colorado Springs to Seattle clicked on KAYAK for each day over the last 12 months.
If you are looking for a flight deal from Colorado Springs to Seattle, look for departures on Thursdays and avoid leaving on a Sunday, as it's usually the priciest day. When flying back from Seattle, Saturday is the cheapest day to fly and Friday is the most expensive.

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 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 $281 on average. On the other hand, the most expensive months are July and June, where the average cost of tickets is $690 and $619 respectively.

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

To calculate daily average prices, KAYAK takes all prices for each day before departure over the last year for 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 month.
To get a below average price on the flight from Colorado Springs to Seattle, you should book around 1 week before departure. For the absolute cheapest price, our data suggests you should book 89 days before departure.

Which airlines provide the cheapest flights from Colorado Springs to Seattle?

The cheapest price for the route for each airline clicked by KAYAK users in the last 72 hours.
In the last 72 hours, the cheapest one-way ticket from Colorado Springs to Seattle found on KAYAK was with United Airlines for $128. Delta proposed a round-trip connection from $218 and American Airlines from $247.

Good to know

Low season

February

High season

October

Cheapest flight

$128
Best time to beat the crowds with an average 23% drop in price.
Most popular time to fly and prices are also 27% lower on average.
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 $128 for a one-way ticket and $218 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?

    Star Alliance, oneworld, and SkyTeam 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, Delta or United Airlines?

    The two airlines most popular with KAYAK users for flights from Colorado Springs to Seattle are Delta and United Airlines. With an average price for the route of $643 and an overall rating of 8.0, Delta is the most popular choice. United Airlines is also a great choice for the route, with an average price of $416 and an overall rating of 7.4.

  • 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.

See more FAQs

Top 3 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
DeltaOverall score based on 11004 reviews
8.2boarding
8.0entertainment
7.9comfort
8.6crew
7.5food
Airline reviews

It was a Red-Eye flight so was not comfortable enough to sleep, but seat was as expected. Crew was great and in-flight entertainment was excellent. Flight was smooth

8.0 ExcellentPatricia, Mar 2024YVR - SEA
Read more about Delta reviews

It was a Red-Eye flight so was not comfortable enough to sleep, but seat was as expected. Crew was great and in-flight entertainment was excellent. Flight was smooth

Standard economy seats on Deltas 767 were better than Alaska premium seats on their 737 MAX9; more legroom, wider seats. Entertainment was great, no ipad or phone required. Could have included a meal service.

Plane was turned around due to fog half way into the flight, Delta did not properly direct passengers to stay on same flight and instead failed to properly rebook on Alaska

The boarding process was terrible especially with an indirect flight Chicago to Seattle to San Diego was terrible talking about we overbooked a flight idk if I’d take this airline ever again we got off our flight from Chicago to Seattle and we traveled for business and they told us our connecting flight was over booked and their was no seats asking people to take a delayed next flight and they don’t tell anyone coughing to wear masks seats 30A-B were terrible during the flight no one wants to sit next to people coughing all around I don’t want to be sick traveling for work or get sick anytime it’s very upsetting the staff doesn’t take this stuff serious to tell them to wear masks when they see people coughing and sneezing

Flight was on time, the crew was personable & professional, & the plane arrived early which was nice.

This flight landed early, but deplaned late. We were stuck sitting and waiting for a gate for over an hour

My flight was very clean and the location was comfortable. The service was great. A satisfying flight!

I appreciated being upgraded. I was very disappointed with my 13 hr layover in Seattle to geg, while my friends who flew Alaska made it home as scheduled. I had to reserve a hotel on my dime.

Delta needs to step up the meals and snacks. They have been serving the same two meals for three years.... It is time to change it up.

Really liked the choice of the 4 free snack options. Crew great. Good vibe on plane.

Flight delayed from Cape Town to Washington then got diverted to miami and in miami we had to fend for ourselves , im still trying to get to Shreveport now

I just wrote a text which was supposed to be for the flight from Denver to spokane not Frankfurt to Denver.

Too many fees (but that seems to apply to all airlines nowadays)

It was delayed several hours which delayed our connection in Denver. Not happy.

Flight was on time. Staff were friendly. I paid for Economy Plus but was required to check my standard carry-on luggage due to lack of space on the aircraft. This cost me 30 minutes, unexpectedly, in waiting at the baggage claim. This experience did not meet my expectations.

Everything was very good. Boarding and takeoff were on time and organized. Had a good flight

Wheelchair assistance was not complete. The person left me at the departure gate without informing the groundstaff of my requirements. I had to walk to the departure counter to ask for help to reach the plane door. The crew informed me that in future they were not allowed to help passengers like me, senior citizen and Wheelchair passenger with placing their carry on bags in the overhead compartments!

Flight was delayed by over an hour and gate checked bags took 15 minutes to be delivered to the jet bridge.

Seats are way too snug for my hip to knee ratio and the recline on the seat in front of me made my experience worst. My legs had no room at all. Not a plane for people 6 ft or over unless you fly first class.

Our flight was delayed many times throughout the day. The final delay was about 8 hours. I spent time in line to speak to someone at their understaffed desk, and also spent time waiting online and then chatting with a service rep. None of the United employees were any help at all. I desperately wanted to go get rest and possibly re-book my trip but I was denied any compensation or voucher for a hotel. I was repeatedly told it was not United's fault and therefore they had no compensation to offer. Overall, a cold and callous experience.

This flight is frequently delayed. The connections seemingly are more frequently delayed. I’ve missed connections as a result twice on the same route to charlotte then Charleston. Final destination arrival has been the next day, twice in a row. No pilots, no crew. Too many excuses. Unfortunately, my days with American are over.

Entertainment was okay not because anything was wrong but it is a short flight so having no wifi is annoying but understandable. Crew was outstanding as usual

Those seats were way too narrow. I had the middle seat, one person was a very skinny person and we still couldn’t avoid touching each other anytime one of us moved. The other person was larger and we were basically sitting in each others lap the entire flight. There was zero entertainment. The flight was long enough to justify tvs, but no. Gotta sit there in your infant seat and twiddle your thumbs.

i suspect i caught flu on this flight as i could hear someone coughing a few rows back and ended up with flu a few days later. also tiresome to have to watch movies on my device by holding up smartphone screen, would have liked to have in seat display.

I had trouble finding a boarding pass because I had an hour between Flights and American did not see my flight I believe because I was ticketed through KAYAK. I did not have enough time to go to the desk before boarding so I went to the desk and told them while I was boarding and they had a boarding pass for me within three minutes. Nice. I paid extra to have more legroom and it is definitely worth it for a six hour flight. I would’ve paid for a decent dinner, but they didn’t offer anything but a snack box —not good for six hours.

It was great. It was just a commuter so I splurged on first class and it was wonderful. Wish all seats were this spacious. Enjoyed it and will do it again.

Terrible flight seats where really uncomfortable I had body aches for 2 days and flight was delays almost two hours

It was super hot. The flight attendant seemed forgetful and abrupt.

Deicing in Denver took forever and I almost missed my connection. De-ice faster! Not Americans fault.

Very smooth for one of the busiest travel days of the year and the crew was great.

Book cheap flights from Colorado Springs to Seattle

Recent one-way flight deals

 
Only flying one-way? Below are some of the best one-way flight deals from Colorado Springs to Seattle found on KAYAK in the last 72 hours.
6/11Tue
1 stopUnited Airlines
7h 20mCOS-SEA
$128
4/29Mon
1 stopAmerican Airlines
7h 41mCOS-SEA
$131
6/9Sun
1 stopSun Country Air
13h 57mCOS-SEA
$143
5/10Fri
1 stopUnited Airlines
7h 03mCOS-SEA
$146
5/8Wed
1 stopUnited Airlines
7h 22mCOS-SEA
$155
4/30Tue
2 stopsAmerican Airlines
10h 45mCOS-SEA
$163
5/10Fri
1 stopAmerican Airlines
9h 30mCOS-SEA
$188
5/11Sat
2 stopsAmerican Airlines
10h 32mCOS-SEA
$193
6/11Tue
2 stopsDelta
24h 47mCOS-SEA
$233
5/8Wed
2 stopsDelta
24h 20mCOS-SEA
$283

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Colorado Springs - Seattle Flights

Departure:

Colorado Springs (COS)United States

Destination:

Seattle (SEA)United States

Return flight deals:

Seattle - Colorado Springs

Cabin classes: