$36 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 5/10. 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.
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These are the airlines KAYAK users have selected most often from within our search results in flight searches from Seattle to Colorado, 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 Seattle to Colorado, as well as popular online travel agencies
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Best Colorado Flight Deals from Seattle

Cheapest round-trip prices found by our users on KAYAK in the last 72 hours

Denver
Denvernonstop$56
Aspen
Aspen1 stop$349
Vail
Vail1 stop$135
Grand Junction
Grand Junction2 stops$238
Durango
Durango1 stop$298
Montrose
Montrose1 stop$350
Hayden
Hayden2 stops$253
Gunnison
Gunnison1 stop$450

Good to know

Low season

January

High season

May

Cheapest flight

$36
Best time to beat the crowds with an average 17% drop in price.
Most popular time to fly with an average 1% increase in price.
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-DENDec 2024
I didn’t have any problems using Alaska Airlines
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 long is the flight to Colorado from Seattle?

    Flights to Vail2h 57m
    Flights to Hayden2h 33m
    Flights to Denver2h 57m
  • What is the cheapest flight to Colorado from Seattle?

    The cheapest ticket to Colorado from Seattle found in the last 72 hours was $36 one-way, and $56 round-trip. The most popular route is from Seattle to Hayden, and the cheapest round-trip airline ticket found on this route in the last 72 hours was $159.

  • Which airlines fly to Colorado?

    United Airlines flies most frequently to Hayden from Seattle. In general, Alaska Airlines, Hawaiian Airlines and Air Tahiti Nui fly the most to Colorado.

  • 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.

See more FAQs

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 $142 one-way - $192 round-trip
  • Book at least 1 week before departure in order to get a below-average price.
  • High season is considered to be November and December. The cheapest month to fly from Seattle is February.
  • Morning departure is around 20% more expensive than an evening flight, on average*.
See more tips
*Average of the lowest prices shown in KAYAK’s search results for departures within the next 30 days

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.
8.1
SouthwestOverall score based on 4654 reviews
7.7Entertainment
8.2Boarding
8.1Comfort
8.7Crew
7.2Food
Airline reviews

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.

8.0 ExcellentGavin, Jan 2025SEA - DEN
Read more Southwest reviews

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.

For the first time in a long time we had a flawless experience with Southwest. Both flights were early and no mechanical errors at all. We were shocked and pleasantly surprised 😮.

One of the crew performed a hilarious skit to accompany the standard instructions. Passengers enjoyed it so much they applauded at the end!

It was really nice! I appreciate the gate attendant allowing families with small children to board early on in the process… that was very helpful! The internet service didn’t work with the app I was trying to use even though I paid the $8… other than that it was great! Oh and I should’ve asked for the whole cranberry cocktail can. That cup was about 2 sips…

They sent us to an airport way out of our way because they canceled our flight with no reason

A bit expensive for the overall service; but the flight departed on time and arrived early.

I love no assigned seats and bags fly free. If Private Equity gets their way and forces Southwest to change they will be everyone else and I will stop being loyal to them. DON'T CHANGE YOUR BUSINESS MODEL!!!

Crew always seems to be unprofessional no matter what Southwest flight I fly

The 700 model seating is too tight both seat size & leg room

Being paid like a full service airline , I felt some features like no screen on seat, very poor entertainment content and no headphone provided. I like the checked bag benefit. Open seating concept is not nicely implemented as people were boarding out of order.

I would probably fly with them again. It was a smooth process.

Crew was great, flight was uneventful (which is what you want!), would like media in the seat backs in all airplanes ..but all in all it was a good flight experience.

Unfortunately, an issue occurred where a delay impeded me from making my connection in LA. I couldn't get a flight home until 10 hours after my originally scheduled flight. Once I finally made it to DFW for my connecting flight, my next flight was delayed. I was supposed to be home on 12/23 at 9:00 p.m. I didn't make it home until 12/24 at 11:00 a.m. I was given the choice to either take a flight the next day or the flight that way 10 hours later. I wasn't given an option for a hotel if I stayed overnight. I was also denied the ability to go to the Alaska Lounge due to the delay. It was a very uncomfortable experience. The only seat I was able to get on the next flight was in a row where the seats couldn't recline. After an extended wait at the airport, this was very frustrating!

We don't have food or entertainment on this flight. We were late boarding but then arrived in Yakima early. Kayak sent me a delay notice but we weren't delayed.

I paid $49 to select my seat---6A a window seat just behind first class. When I started to get on the plane I was told that my seat had been given to someone else and I now had a middle seat. They finally gave me an aisle seat. When I told them I wanted my $49 back, I was told I would need to call alaska and fight with them to get my money back. And when i was on the flight people going by kept hitting me with their bags. I have tried calling alaska twice to talk about a refund but never got thru to the right person!

Flight crew had the courtesy to ask passengers from my first flight to allow those of us disembarking to go first so that we could make it onto our connecting flights. Worked like a charm. Both crew and fellow passengers working together for a better outcome for all.

We missed our connection to Portland and ended up having to drive.

Spent extra to choose my seat. Found a window available so grabbed it. They did not mention the row didn’t recline. Had over 5 hour flight stuck in a straight back chair. Traveling for funeral - needed to rest and couldn’t get comfortable (row infront of exit😒 should have realized but wasn’t thinking I guess).

You an Kayak offered travel insurance. I had to cancel are flights which I well say was easy an I got my money back. BUT not the travel insurance Kayak or X cover has keep the money. So why I never went on the fligt I cancel way early. I know one thing I'll never go to kayak again.

Check-in was easy, I did it from the app. Boarding was easy, the crew was great. Santa Barbara airport had a disabled plane so we had to land in Burbank to refuel. They kept us well informed, and everyone was great. A very entertaining person from the Burbank airport got on and told a few jokes.

Other then mechanical/ computer problem and 3.5 hours flight delay the flight was great. I guess that what happened when you fly an old airplane now a day.

Most of my discomfort was going through TSA. However, the Delta seats had inadequate leg room and I tried my very best to connect to the wi-fi and it was a cumbersome process that finally gave me the info that I needed to sign in AFTER I had completed the flight...Why make it so difficult to use? That said I really really appreciate the pilot taking a little extra time to avoid a bad storm area and both landings in Atlanta and Orlando were flawless to my delight!!!

Bottom seat cushion is almost non existent. Very uncomfortable seat.

Airline lost my luggage and set me back a day worth of travel due to having to stay in Denver to wait on my luggage

Coach seating is debilitating, neither my husband or I can walk the following day

It was NOT pleasant. Started from checking our luggage to the last time getting off the plane. The crew was not friendly, the food was horrible and the seats were too close to each other that I got a bruise on my knee.

Late departure due to large number of wheel chair patrons. Used to having a box of snacks to select from in comfort plus. The flight attendant just rattled off what was available and asked us to pick. Felt rushed and uncomfortable. Seat was great. Prefer having the screen on the seat in front of me instead of having to pull it up from the seat side. Lots of room for my carryon under the seat in front of me.

The flight was canceled two hours before departure, it took over five hours to rebook us on another flight.

Really bad baggage handling. Had my Rimowa bag badly damaged at the latches.

The plane from SNA wouldn’t start after 5 tries. The team gave me an option of flying direct from LAX and giving me a Lyft ride there! Perfect!

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.

The plane was clean. The staff was excellent. The flight attendants were very good. Enjoyable flight. Overall. The seats in the back are too small but, will always be.

Flight was 3 1/2 hour delayed with no credit or meal vouchers

late departure due to some unspecified issue with ventilating the cabin. They got it running but it was FREEZING for the whole flight. I asked for a blanket but they didn't provide one. They could not turn up the heat. it was quite miserable.

Liked that we left on time for each flight. Snacks not the best, but we're okay.

It was fine. The flight attendant appeared to be in a bad mood but everything was fine.

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.

Allowed me to chose my seat without extra charge (I purchased full-price ticket) and boarding was in group1. Didn't even serve water.

Stuck in Phoenix for two days, not even a hotel voucher offered.

Every day about it was very different all the boarding pass where all wrong l miss flight no refund all crazy

Flight got delayed for 3.5 hours, and for the first hour after the departure time there was no update from the gate folks...

Both flights were delayed. The sizing of bags is crazy. I know it is advertised as a no frills cheaper option but it does feel like you are being extorted for money the whole way-- $20 dollars to talk to a gate agent? Charging for soda a pretzels? I don't think I will be flying Frontier again if I can help it. That said, all the staff were wonderful.

Book cheap flights from Seattle to Colorado

Recent round-trip flight deals

 
These are the cheapest round-trip flights from Seattle to Colorado found on KAYAK in the last 72 hours.
5/6Tue
nonstopFrontier
2h 51mSEA-DEN
5/12Mon
nonstopFrontier
3h 08mDEN-SEA
$81
2/21Fri
1 stopFrontier
5h 59mSEA-DEN
2/27Thu
nonstopFrontier
3h 05mDEN-SEA
$82
3/4Tue
1 stopUnited Airlines
6h 24mSEA-DEN
3/6Thu
nonstopUnited Airlines
3h 03mDEN-SEA
$123
2/20Thu
1 stopUnited Airlines
6h 24mSEA-DEN
2/27Thu
1 stopUnited Airlines
6h 12mDEN-SEA
$128
2/12Wed
nonstopDelta
2h 47mSEA-DEN
2/17Mon
nonstopDelta
3h 14mDEN-SEA
$147
2/25Tue
nonstopDelta
2h 42mSEA-DEN
3/1Sat
nonstopDelta
3h 14mDEN-SEA
$157
2/19Wed
1 stopSouthwest
7h 20mSEA-COS
2/26Wed
1 stopSouthwest
7h 45mCOS-SEA
$159
2/8Sat
1 stopSouthwest
10h 00mSEA-DEN
2/11Tue
nonstopSouthwest
3h 00mDEN-SEA
$207
3/22Sat
nonstopAlaska Airlines
2h 25mSEA-HDN
3/26Wed
nonstopAlaska Airlines
2h 39mHDN-SEA
$352
2/22Sat
nonstopAlaska Airlines
2h 22mSEA-HDN
2/26Wed
nonstopAlaska Airlines
2h 44mHDN-SEA
$397

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Recent one-way flight deals

 
Only flying one-way? Below are some of the best one-way flight deals from Seattle to Colorado found on KAYAK in the last 72 hours.
5/10Sat
nonstopFrontier
2h 51mSEA-DEN
$36
4/23Wed
nonstopFrontier
2h 46mSEA-DEN
$38
3/24Mon
nonstopUnited Airlines
2h 45mSEA-DEN
$59
4/15Tue
nonstopDelta
2h 45mSEA-DEN
$89
2/20Thu
1 stopUnited Airlines
6h 24mSEA-DEN
$94
4/30Wed
1 stopSouthwest
8h 15mSEA-DEN
$99
2/23Sun
1 stopAlaska Airlines
4h 36mSEA-DEN
$108
3/27Thu
1 stopSouthwest
5h 35mSEA-DEN
$109
2/18Tue
1 stopDelta
12h 57mSEA-DEN
$117
3/7Fri
1 stopAlaska Airlines
4h 49mSEA-DEN
$148

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Last minute flights from Seattle to Colorado

Last minute flight, train and bus deals

 
These last-minute flight deals are the cheapest flights found on KAYAK in the last 72 hours for flights from Seattle to Colorado that are departing in the next 10 days.
1/26Sun
nonstopFrontier
2h 47mSEA-DEN
1/27Mon
nonstopFrontier
3h 05mDEN-SEA
$235
1/23Thu
nonstopFrontier
2h 47mSEA-DEN
1/27Mon
nonstopFrontier
3h 05mDEN-SEA
$238
1/25Sat
nonstopDelta
2h 55mSEA-DEN
1/29Wed
nonstopDelta
3h 17mDEN-SEA
$367
1/25Sat
multi-stopUnited Airlines
6h 15mSEA-DEN
1/29Wed
multi-stopUnited Airlines
6h 20mDEN-SEA
$382
1/25Sat
multi-stopDelta
5h 07mSEA-DEN
1/27Mon
multi-stopDelta
5h 05mDEN-SEA
$387
1/23Thu
multi-stopSouthwest
7h 20mSEA-DEN
1/27Mon
multi-stopSouthwest
5h 55mDEN-SEA
$388
1/26Sun
nonstopSouthwest
2h 40mSEA-DEN
1/26Sun
multi-stopSouthwest
7h 45mDEN-SEA
$397
1/25Sat
nonstopAlaska Airlines
2h 42mSEA-DEN
1/29Wed
nonstopAlaska Airlines
3h 19mDEN-SEA
$442
1/24Fri
multi-stopUnited Airlines
11h 50mSEA-DEN
2/1Sat
multi-stopUnited Airlines
6h 21mDEN-SEA
$467
1/23Thu
nonstopAlaska Airlines
2h 42mSEA-DEN
1/25Sat
nonstopAlaska Airlines
3h 21mDEN-SEA
$537

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

Information on your arrival and departure airports

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