Find flights
Deals
When to book
FAQs & Tips
Airlines

Find cheap flights from Seattle to Colorado from $48

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 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
Thu 7/4
Thu 7/11

Search hundreds of travel sites at once for deals on flights to Colorado

In the last 7 days travelers have searched 44,060,346 times on KAYAK, and here is why:

Save 21% or moreCompare multiple travel sites with one search.

Track pricesNot ready to book? Create a price alert for when prices drop.

Filter your dealsChoose cabin class, free Wi-Fi and more.

Bundle and saveSave money when you bundle your flight + hotel.

Best Colorado Flight Deals

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

Denver
Denvernonstop$98
Aspen
Aspen1 stop$296
Grand Junction
Grand Junction1 stop$259
Durango
Durango1 stop$392
Montrose
Montrose1 stop$302

Good to know

Low season

January

High season

June

Cheapest flight

$48
Best time to beat the crowds with an average 26% drop in price.
Most popular time to fly with an average 22% increase in price.
Flight from Seattle to Denver

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 to Colorado from Seattle 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 to Colorado with an airline and back to Seattle 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 to Colorado from Seattle 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 $108 one-way - $187 round-trip
  • Morning departure is around 27% cheaper than an evening flight, on average*.
*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

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.
8.3
EVA AirOverall score based on 1492 reviews
8.4Boarding
8.6Crew
8.0Food
8.0Entertainment
8.2Comfort
Airline reviews

The crew was very helpful. Food was prepared with great care and tasted wonderful. Movie selection was a bit limited. The bedding on the seat is a little too thin for sleeping.

10.0 ExcellentBinhui, Jun 2024IAH - TPE
Read more about EVA Air reviews

The crew was very helpful. Food was prepared with great care and tasted wonderful. Movie selection was a bit limited. The bedding on the seat is a little too thin for sleeping.

Their announcement was not quite clear in Chinese. The rest is pretty good.

The hygiene of the bathrooms were terrible. Urine smells leaked out into the cabin and the seats were really tight, even for a petite woman like myself. Flight attendants did not go through the cabin enough to offer refreshments.

I was expecting that movie selection and food would have been better. Everything else was great.

The type of the food requested (Asian vegetarian) was not properly met with. They have very limited snack items that may compensate for the main meals.

The quality of the food is pretty good. Thank you, EVA Air.

Pleasant, comfortable, and entertaining. All told, ZERO issues with it. And sadly, so far the flight was WAY more comfortable than the hellhole that is "Lambug Beach Resort" at Badian Beach!

Pleasant crew. Very long flight, a bit uncomfortable at times being seated, but not too bad.

No ice for the drinks. Only gave a half a cup of your beverage. Not enough water. I got very dehydrated.

Eva is one of the top airlines in Asia... but often are over priced. Finally found a reasonable rate.

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!

Had a broken tray in business class. Crew just shrugged it off.

Everything was great except for the seat. The backrest would not stay in the upright position.

public website still broken for years randomly blocking browsers with privacy options active after loading a page maybe once. check-in on laptop was almost impossible but eventually randomly worked. had to print pass at airport since couldn't get back in to load digital pass on mobile firefox or chrome. red eye flight so smooth onboarding, plenty of room to spread out, easy offboarding. onboard wifi instructions mention vpn can cause problems connecting but fails to also mention private dns. no printed or built in menu list, seems weird to require personal device to point at qr code link for menu which does not even allow direct ordering. people with health condition risk related dietary restrictions trying to avoid for example cholesterol and sugar are left guessing what they can order either way without nutritional info highlights (cranberry juice was minute maid cocktail with as much suger as typical can of soda). tap to pay wasn't working and always seems sketchy to manually enter card info. good movie variety, so limited tv was okay.

Bag drop off was slow and annoying. Only 2 agents at the entire delta desk, and no one directing traffic for what line to be in, many confused people slowed down the process. Boarding was fine. Seats in Delta comfort plus were fine. Snacks were great! Definitely a bonus. The entertainment system was awful — old, slow, not responsive, and completely unable to play games due to some kind of error. But on the other hand, thank you to Delta for the free WiFi. That made it better.

Flight diverted in SD. Later take off in Seattle by 1.3hrs

Mi primera conexión se retrasó por lo cual perdí mi segunda conexión la cual salió adelantada

Crew was not friendly when I went to request a seat change.

There were choices for the snacks. Good choices and tasty lunch and breakfast as well.

The flight crew was amazing. I’m very tall and they moved me to an exit row unsolicited!!! Amazing service.

Not worth the price of premium class ticket paid, felt more like steerage.

The Wi-Fi was unavailable on this flight for some reason.

This was a Lufthansa flight, not United. The CSA at the counter, Ashley, was not only incompetent, but quite rude. Me and two other PAX waited over 7 minutes standing in front of her and another CSA and they ignored us. We joked that we must have accidently taken invisibility pills. She could have at least said "I'll be with you in a moment, I'm currently....". I could go on about how rude she and the other CSAs were (whispering, not communicating with me, blaming the situation on others, etc.). She would not work for me. Then, she gave me literally the worst seat on the plane. the worst. My seat kept getting bumped (rammed twice by the crew with their carts and about every 5 minutes by someone using the bathroom), listening to the bathroom all night, crowded seat, etc.

We ended up with seats in the very back. So they did not recline. Have no idea why, we reserved and checked in very early. The isles were very narrow and the seats had very little leg room. But they did give us water, and a snack.

I paid $380 for my one-way ticket from California to Minnesota. The fair did not include online check-in. I received instructions from their app to check in at a kiosk. At the kiosk, the boarding pass would not print until an actual person came to verify that I had a personal item and not a carry-on item, On the plane, the person next to me was drunk and allowed to continue to order alcohol. United is garbage I’d rather fly spirit.

The plane was dirty and the in seat air wasn't blowing as planes usually do.

Positive: Entertainment via phone on the short was great and my first time. Good food and wine and head phones for free. Negative: Seat hardly reclined on the long flight. Breakfast was an egg with a bun. No egg choices and rather have something sweet like bun/jam and Youghurt.

They did get us booked on a later flight, but it made us miss our connecting flight. So, we had to stay and another state overnight with no luggage or clothes. Because they kept our luggage at airport for next flight on the next day.

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.

Crew is way too many times on the intercom re explaining the same thing

Terrible. I didn’t fly and I had an important meeting the next day.

Equipment swap led to 2+ hour delay on international flight. And to top it off, boarding took forever.

Wretched scheduling - they got themselves into a critical crew situation and didn’t try to address it until 15 minutes before they had to cancel my flight

They cancelled two flight and got us onto another airline, which was also delayed.

Nothing, terrible travel experience due to weather and maintenance delays and was left stranded in Austin.

My husband and I pre-ordered our food, but they did not have my husband’s order, and my cheese plate was very average. I asked for a blanket and was told they don’t carry blankets on domestic routs. The flight was on time and smooth!

28 hour delay at Fort Worth/Dallas airport, part due to weather which was unavoidable, but various other reasons - no pilot, no fa, mechanical problem, plane too small, too big, crew out of flying time, seat configuration problems.... endless and hourly updates with a different excuse. Finally told us about 3.00 am, that the flight was delayed to hours later.

Experience was bad. 3.5 hour delay for a 2.5 hour trip. There was no r Transparency about the reason for the delay and it was done 30 mins at a time.

The boarding process and flight were great. However, I waited about 40 minutes for my luggage. It did not come up on the designated belt. Instead, everyone’s bags were on a cart. Not sure what the issue was, but we were not informed until another passenger went looking for her bags and found them.

There were delays on both ends. It made it less than excellent. This plane was great though

A220 plane had 5 seats across which is great for couples who can snag the A&C seats. Seat itself is borderline comfortable but still tough on a 5+ hour flight. Overhead bins are small so if you're not in at least boarding group 5, you could be in trouble. No included food service. Non-alcoholic drinks are free but even the most basic snacks are for a charge. Price was reasonable for the only direct SEA-YUL flight. Boarding is efficient even managing passport checks. Worth flying for the direct flight.

This was a red eye return, so I doubt there would be anyway to make it better. Other than adding beds.

Excellent host on board. Not so friendly check-in staff. Older plane with no food or entertainment due to short flight. Friendly captain and crew.

It took 66 hours to get from Seattle to Tel Aviv. As a minor, I was left for more than 12 hours in Toronto and Frankfurt without hotel and food vouchers. It took 5 layovers. It was insane and not okay

Flew SEA-CA, then CA-NRT. First flight was short but very uncomfortable, dirty, and had very small overhead storage space. The seats and fans were not cleaned and had visible dirt on them. Second flight was perfect.

My experience was pretty frustrating because the first leg of my flight on United (though booked through Air Canada) was delayed causing me to miss my connecting flight on Air Canada. This could have been an easy solve as there was a direct flight later that morning via Air Canada that they easily could have put me on which would have only gotten me to my destination 2 1/2 hours later but because United and Air Canada don’t seem to have good communication they gave me the run around both telling me to talk with the other which I did three times to no avail. I ended up taking the delayed flight and getting on a new connecting flight which ended up getting me to my destination 6 hours later and I missed the event I was planning to go to this evening.

I was appalled to have to pay for just a regular seat when I went to book 24 hrs before my flight! Because it was only an hour flight I didn’t choose a seat from Grand Junction to Denver, but I did for Toronto and had to pay just to choose a regular available seat! In my 60+ years of flying this was the first time I have heard of this. Also, allowing people to bring on “huge “ suitcases, not carry on size, but much bigger, and then a large pack pack stuffed. So they take up all the room in the overhead bins and if we are later boarding, there is no room so we have to check our small carry on. I have already paid for and checked in one bag! I certainly will not choose to fly with United again unless it is the “only” airline available!

It was an excellent experience, traveling from Toronto to Denver with United.

Fresh fuit or veg snacks would be so great, but there are two good restaurants in Denver airport. Try Etais UDIS or Freshens DIA for nutritious delicious pita sandwiches/ donairs and crepes in Freshens.

Crowded plane but it flew on time and had friendly staff

Book cheap flights from Seattle to Colorado

Recent round-trip flight deals

8/14Wed
nonstopFrontier
2h 43mSEA-DEN
8/20Tue
nonstopFrontier
3h 02mDEN-SEA
$98
6/15Sat
nonstopFrontier
2h 51mSEA-DEN
6/26Wed
nonstopFrontier
3h 01mDEN-SEA
$100
8/15Thu
nonstopDelta
2h 33mSEA-DEN
8/21Wed
nonstopDelta
2h 56mDEN-SEA
$177
11/26Tue
nonstopDelta
2h 38mSEA-DEN
12/2Mon
nonstopDelta
3h 10mDEN-SEA
$187
8/22Thu
1 stopAmerican Airlines
9h 44mSEA-COS
8/26Mon
1 stopAmerican Airlines
6h 54mCOS-SEA
$188
7/4Thu
1 stopAlaska Airlines
6h 59mSEA-DEN
7/7Sun
nonstopAlaska Airlines
2h 58mDEN-SEA
$196
7/7Sun
nonstopAlaska Airlines
2h 44mSEA-DEN
7/12Fri
nonstopAlaska Airlines
2h 58mDEN-SEA
$217
8/21Wed
1 stopAmerican Airlines
7h 42mSEA-COS
8/26Mon
1 stopAmerican Airlines
6h 54mCOS-SEA
$222
7/4Thu
1 stopUnited Airlines
7h 22mSEA-COS
7/6Sat
1 stopUnited Airlines
6h 38mCOS-SEA
$274
8/13Tue
2 stopsUnited Airlines
8h 42mSEA-COS
8/14Wed
1 stopUnited Airlines
5h 30mCOS-SEA
$291

Search by stops

Search by airline

Search by price

Recent one-way flight deals

6/11Tue
nonstopFrontier
2h 58mSEA-DEN
$48
6/15Sat
nonstopFrontier
2h 51mSEA-DEN
$49
9/3Tue
nonstopDelta
2h 33mSEA-DEN
$69
9/1Sun
nonstopDelta
2h 33mSEA-DEN
$89
7/8Mon
nonstopAlaska Airlines
2h 44mSEA-DEN
$94
9/7Sat
1 stopAmerican Airlines
6h 00mSEA-DEN
$99
10/1Tue
1 stopAmerican Airlines
6h 00mSEA-DEN
$100
7/4Thu
1 stopAlaska Airlines
7h 09mSEA-DEN
$103
8/23Fri
1 stopUnited Airlines
8h 20mSEA-DEN
$128
7/2Tue
1 stopUnited Airlines
7h 24mSEA-DEN
$133

Search by stops

Search by airline

Search by price

Last minute flights from Seattle to Colorado

Last minute flight, train and bus deals

6/5Wed
nonstopFrontier
2h 51mSEA-DEN
6/12Wed
nonstopFrontier
3h 00mDEN-SEA
$126
6/5Wed
nonstopFrontier
2h 51mSEA-DEN
6/11Tue
nonstopFrontier
3h 03mDEN-SEA
$128
6/8Sat
nonstopDelta
2h 44mSEA-DEN
6/10Mon
nonstopDelta
3h 06mDEN-SEA
$287
6/5Wed
multi-stopDelta
4h 54mSEA-DEN
6/10Mon
nonstopDelta
3h 06mDEN-SEA
$302
6/5Wed
multi-stopAlaska Airlines
6h 52mSEA-DEN
6/11Tue
multi-stopAlaska Airlines
5h 17mDEN-SEA
$311
6/5Wed
multi-stopAmerican Airlines
5h 52mSEA-DEN
6/7Fri
multi-stopAmerican Airlines
6h 07mDEN-SEA
$326
6/6Thu
nonstopUnited Airlines
2h 47mSEA-DEN
6/9Sun
nonstopUnited Airlines
2h 55mDEN-SEA
$513
6/8Sat
multi-stopAmerican Airlines
7h 38mSEA-COS
6/23Sun
multi-stopAmerican Airlines
17h 25mCOS-SEA
$538
6/5Wed
multi-stopAlaska Airlines
6h 52mSEA-DEN
6/12Wed
multi-stopAlaska Airlines
11h 26mDEN-SEA
$555
6/5Wed
multi-stopUnited Airlines
6h 24mSEA-DRO
6/12Wed
multi-stopUnited Airlines
8h 54mDRO-SEA
$649

Search by stops

Search by airline

Search by price