$71 Find Cheap Flights from Seattle to Colorado

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight from Seattle to Colorado departing on 10/17. 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 Colorado

 
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Seattle to Colorado.
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Seattle to Colorado.
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Flights Deals

Best Colorado Flight Deals from Seattle

Cheapest round-trip prices found by our users on KAYAK in the last 72 hours
Denver
Denvernonstop$120
Aspen
Aspen1 stop$249
Grand Junction
Grand Junction1 stop$223
Durango
Durango1 stop$229
Montrose
Montrose2 stops$275
Hayden
Hayden1 stop$324
Gunnison
Gunnison1 stop$589
Vail
Vail1 stop$602
Denver
Denvernonstop$120
Aspen
Aspen1 stop$249
Grand Junction
Grand Junction1 stop$223
Durango
Durango1 stop$229
Montrose
Montrose2 stops$275
Hayden
Hayden1 stop$324
Gunnison
Gunnison1 stop$589
Vail
Vail1 stop$602

Cheap Flights from Seattle to Colorado

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from Seattle to Colorado 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 Seattle to Colorado

Sat, Sep 13 - Sat, Sep 20
Frontier Logo
6:00 am - 9:51 amSEA-DEN
2h 51mnonstop
Frontier Logo
6:32 pm - 8:44 pmDEN-SEA
3h 12mnonstop
$120Frontier
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Thu, Aug 14 - Mon, Aug 18
Frontier Logo
7:48 pm - 11:40 pmSEA-DEN
2h 52mnonstop
Frontier Logo
10:29 pm - 12:34 amDEN-SEA
3h 05mnonstop
$121Frontier
Find Deal
Sat, Sep 27 - Tue, Sep 30
Delta Logo
7:40 pm - 11:24 pmSEA-DEN
2h 44mnonstop
Delta Logo
7:50 pm - 10:04 pmDEN-SEA
3h 14mnonstop
$157Delta
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Wed, Jul 30 - Sat, Aug 16
Delta Logo
7:20 am - 11:05 amSEA-DEN
2h 45mnonstop
Delta Logo
6:35 am - 8:29 amDEN-SEA
2h 54mnonstop
$167Delta
Find Deal
Sat, Oct 25 - Mon, Oct 27
Southwest Logo
4:30 pm - 8:05 pmSEA-DEN
2h 35mnonstop
Southwest Logo
6:15 pm - 8:15 pmDEN-SEA
3h 00mnonstop
$177Southwest
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Thu, Aug 21 - Sun, Aug 24
Southwest Logo
1:45 pm - 10:30 pmSEA-COS
7h 45m1 stop
Southwest Logo
4:15 pm - 9:45 pmCOS-SEA
6h 30m1 stop
$183Southwest
Find Deal
Tue, Sep 23 - Sat, Sep 27
Alaska Airlines Logo
10:15 am - 2:06 pmSEA-DEN
2h 51mnonstop
Alaska Airlines Logo
11:40 am - 3:33 pmDEN-SEA
4h 53m1 stop
$187Alaska Airlines
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Wed, Jul 9 - Wed, Jul 16
Alaska Airlines Logo
5:25 am - 10:37 amSEA-DEN
4h 12m1 stop
Alaska Airlines Logo
6:00 am - 8:01 amDEN-SEA
3h 01mnonstop
$207Alaska Airlines
Find Deal
Thu, Jul 3 - Tue, Jul 8
United Airlines Logo
7:00 pm - 10:51 pmSEA-DEN
2h 51mnonstop
United Airlines Logo
4:00 pm - 8:56 pmDEN-SEA
5h 56m1 stop
$237United Airlines
Find Deal
Thu, Jul 3 - Fri, Jul 11
United Airlines Logo
2:57 pm - 9:55 pmSEA-COS
5h 58m1 stop
United Airlines Logo
6:35 pm - 10:59 pmCOS-SEA
5h 24m1 stop
$243United Airlines
Find Deal
Useful Info

KAYAK's insights & trends for Seattle to Colorado flights

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

What is the cheapest Seattle to Colorado flight route?

The cheapest price for flight routes found by users searching on KAYAK in the last 2 weeks for round-trip flights from Seattle to Colorado.

The cheapest ticket to Colorado from Seattle found in the last 72 hours was to Denver, at $115 round-trip. The most popular route is from Seattle (SEA) to Denver (DEN), and the cheapest round-trip airline ticket found on this route in the last 72 hours was $115.

Can I save money by flying with a layover from Seattle to Colorado?

The average round-trip price for all non-stop flights, flights with one layover, and flights with two layovers for the route found by users searching on KAYAK in the last 2 weeks.

No, with an average price for the route of $486, prices are generally cheapest when you fly direct.

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

To calculate monthly average prices, KAYAK takes all prices for each month over the last year for round-trip flights from Seattle to Colorado, 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 Seattle to Colorado is October, when tickets cost $161 (return) on average. On the other hand, the most expensive months are December and April, when the average cost of round-trip tickets is $256 and $237 respectively.

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

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

When flying from Seattle to Colorado, you should consider leaving on a Saturday and avoid Mondays if you are looking for the best rates. For your return to Seattle, you’ll find the best rates on Fridays and the most expensive ones on Sundays.

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

To calculate weekly average prices, KAYAK takes all prices for each week before departure over the last year for round-trip flights from Seattle to Colorado, 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 Seattle to Colorado, you should book around 3 weeks before departure. For the absolute cheapest price, our data suggests you should book 12 weeks before departure.


Good to know

Low seasonJanuary
High seasonAugust
Cheapest flight$71
Best time to beat the crowds with an average 14% drop in price.
Most popular time to fly and prices are also 3% lower on average.
Flight from Seattle to Denver

Flights from Seattle to Colorado: the best tips from KAYAK users

Insights shared by verified travelers who flew the route from Seattle to Colorado 
Verified travelerFlew with Alaska AirlinesSEA-DENMar 2025
Alaska Air is very efficient & on-time so allow enough time to get luggage, go thru Customs & Immigration, & long security lines. Terminals in SEA are readily accessible by trains but more signage is needed. Fortunately, Information booths are everywhere & are manned by very helpful staff.
MichaelFlew with DeltaSEA-DENApr 2025
Train from Denver airport to downtown is easy to use.
Verified travelerFlew with Alaska AirlinesSEA-DENMay 2024
When flying from Seattle to Denver, be ready to take our any electronics and put them in separate bins when going through security. You will also most likely have to take off your jacket as well. During our flight back the flight randomly changed so be on the lookout in case that happens to you! It was by chance that I checked my ticket and saw that the gate changed last minute.

FAQs - booking Colorado flights

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

    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 Seattle to Colorado.

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

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight from Seattle to Colorado 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 Seattle to Colorado?

    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 from Seattle to Colorado with an airline and back with another airline.

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

    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 from Seattle to Colorado up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

  • What is the cheapest time of day to fly to Colorado?

    The cheapest time of day to fly to Colorado is generally at night, when round-trip flights cost $210 on average. Morning departures are around 15% more expensive than evening flights, on average. The most expensive time of day to fly to Colorado is generally in the morning, which is peak travel time and where the average cost of a ticket is $332.

Top tips for finding cheap flights to Colorado

  • Looking for a cheap flight? 25% of our users found tickets from Seattle to the following destinations at these prices or less: Denver $121 one-way - $200 round-trip

Top 5 airlines serving from Seattle to Colorado

 
See real verified KAYAK customer reviews for airlines flying from Seattle to Colorado. 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 Seattle to Colorado? 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
Alaska AirlinesOverall score based on 10000 reviews
7.1Entertainment
8.1Boarding
7.1Food
8.5Crew
7.8Comfort
Airline reviews

We had to take the train to our next gate but had time to eat a meal. When to our next gate and asked employee about gate and got informed that gate had been changed so back on train to next gate. So thankful she was there and informed us of gate change. Because of the issue the boarding was slow but employees were there and busy helping all and keeping it organized.

10.0 ExcellentHelen, Jun 2025SEA - MCI
Read more Alaska Airlines reviews

We had to take the train to our next gate but had time to eat a meal. When to our next gate and asked employee about gate and got informed that gate had been changed so back on train to next gate. So thankful she was there and informed us of gate change. Because of the issue the boarding was slow but employees were there and busy helping all and keeping it organized.

Very pleasant and the flight felt like it went by quick

All flight entertainment is from your own device and there was an $8 charge to connect. also 1 drink and a small bag of pretzels was all that was given to us. other that that the seats were good and the flight itself was as expected.

It is very bad they do not give you money back

They lost our bag and it took them days to find it. Terrible communication and lots of lies about where it was. Their system hasn’t merged with Hawaiian yet they route people on shared flights with Hawaiian, creating an administrative nightmare.

Major flight delays, it was a 1.5-hour delay. The gate kept changing about 3 times in Seattle. very hectic and chaotic.

More leg room in back seats. Can you require people to smell good on planes? ha ha Staff was great! Plane was comfortable. I enjoyed the movies and TV. Smooth take off and landing.

The only problem was the time delay. Kudos to the counter agent in Seattle. Very helpful and gracious.

This flight was how a flight should be. The flight from Hawaii to Seattle was terrible

Quick and easy check-in. Love how technology has helped speed up the flying process. Smooth flight to a Seattle and back. 10/10

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

After a 3 hour layover in Denver my flight was delayed over 5 hours! No explanation; no assistance; no offer to provide compensation; no one at Southwest was willing to offer any assistance. 8 hours in the Denver airport - ridiculous!

WiFi on the flight was not working. Thus, entertainment options were limited.

I really like open seating. I hate that I've heard this is going away. This is one of the unique things that makes Southwest my goto choice.

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.

I am still upset that my bag was lost on a recent trip to Rome ; we were inconvenienced and out €150 Euros ; delta has refused to reimburse us

I am very bothered by the events today. I can't believe the flight attendants allowed someone to take my seat and made me move. It was embarrassing. I was in the right. The lady just didn't want move. I can't believe delta would allow this to stand and disrespect my rights as a passenger. The lady complained about her leg and that she couldn't move. Firstly somehow she was able to make it to row 24. Not sure how much her leg could have hurt. Secondly, I'm in plenty of pain myself. I just finished chemotherapy a several weeks ago. My body is constantly sore. Yet deltas flight attendants didn't appropriately protect my rights. In the end they found me a seat on the plane but I want to understand how delta can operate this way. They in essence allowed a bully to get their way.

I was supposed to be on business class at first class from Denver back to Miami due to weather changes. I missed my connection and it’s put on a flight to Fort Lauderdale. Instead of honoring my business class/1st class ticket, they put me in coach, but there were two first class seats open. I think it’s absolutely disgusting that I paid for first class $1300 ticket and they put me in economy and they had to open seats available and I have still not been refunded the difference. I ended up having to eat a snack box instead of the meal I was supposed to get and did not get home till 2 AM so I think that’s a little pathetic that I had to live off crackers for dinner And my poor dog ate some cheese and salami. Oh yes, apparently when they switched me to the new flight they forgot to mention I had a service dog

Excellent service despite turbulence during the flight. Flight attendants were remarkable!

Flight attendant moved my bag without notifying me and was rude to me when I asked him about it. There was no reason to move it.

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

Food choices were very limited. Taste of the dishes was average.

I liked all the informational texts. I always knew where to go and when .

Received an email the night before showing that there would be seatback entertainment on our flight. We get on and there was no seatback entertainment. And then it was a scramble to try to set up the iPads for the kids before takeoff so they could watch something for the four hour flight.

The reason I don’t fly United. No in seat entertainment for a long flight and inconsistent WiFi and entertainment available from my device.

It was a good flight. Nothing comes to mind about how it could have been better. It was a newer plane, seemed like a great upgrade from your older ones. Staff was very good as well.

The food for long haul was poor compared to Singapore airlines economy. Pasta plain with tomato sauce . Singapore airlines give me Hagen dash small ice cream cup it was great. The choices of dinner course Singapore air also much better The crew mostly friendly. The economy seat are as expected.

I liked the turn-style feature at gate 209B at LAX. Very efficient process. The gate staff also made several, clearly directed announcements so I felt very informed.

Seats are uncomfortable but price is good. Guess I can put up with misery for four hours.

I’ve never traveled on Frontier before. If you want basic, no frills, friendly service at great prices then give them a fly!

i was denied boarding, even though i had an assigned seat, checked in on line and was at airport early. Then they refused to fully refund the the fair and replacement fair because they claimed it was "no show/denied boarding". I will never fly this airline again

The plane failed preflight inspection, so we sat there for 90 mins while they tried to fix it. Ultimately, everything was remedied and we made our connecting flight; instead of a 2 hour layover at the airport, we spent it waiting on the plane.

I loked walking out on the tarmac to board and no first class. I didn't like that they have no snacks or onboard wifi to bide your time.

The seats were extremely hard and uncomfortable. It was disappointing even for a budget airline.

I was surprised that all baggage, including carry on, were charged. Each additional bag went up in cost. Really disappointed in the additional costs.

Delayed each time on a round trip with no significant weather interference. Updates to flight times came after the fact. 30 min behind in boarding and board and phone still show an on time departure. Some mysterious extra 300 miles that came so surprising they had to fuel while we were already on board?

Our flight was canceled for no known reason. We weren’t told until we were checking in at 5:00 am. This was after our last flight with Frontier where we sat on the plane for three hours (not an exaggeration) before we took off because of a mechanical issue. We won’t be flying Frontier again.

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