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Find cheap flights from St. Louis to Colorado from $39

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight from St. Louis to Colorado departing on 6/26. 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
0 bags
Mon 5/27
Mon 6/3

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Best Colorado Flight Deals

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

Denver
Denvernonstop$57
Aspen
Aspen1 stop$533
Grand Junction
Grand Junction1 stop$436
Vail
Vail1 stop$467
Durango
Durango1 stop$397
Hayden
Hayden1 stop$544

Good to know

Low season

April

High season

September

Cheapest flight

$39
Best time to beat the crowds but there is an average 5% increase in price.
Most popular time to fly and prices are also 20% lower on average.
Flight from St. Louis to Denver

FAQs - booking Colorado flights

  • How does KAYAK find such low prices on flights from St. Louis 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 St. Louis to Colorado.

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

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to Colorado from St. Louis 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 St. Louis 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 St. Louis with another airline.

  • What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from St. Louis 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 St. Louis 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 St. Louis to the following destinations at these prices or less: Denver $119 one-way - $148 round-trip
  • Morning departure is around 19% more expensive 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 St. Louis to Colorado

 
Need help choosing which airline to fly with from St. Louis 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
DeltaOverall score based on 10951 reviews
7.9comfort
8.2boarding
8.0entertainment
7.4food
8.6crew
Airline reviews

I had a wonderful experience flying with delta. The gentleman taking care of us on our flight was so nice, accommodating, and attentive. He always was smiling and giving pins to the kids which made me smile. The flight was quick too and without turbulence. Thank you for the great flying experience.

10.0 ExcellentAlexander, Apr 2024RDU - CVG
Read more about Delta reviews

I had a wonderful experience flying with delta. The gentleman taking care of us on our flight was so nice, accommodating, and attentive. He always was smiling and giving pins to the kids which made me smile. The flight was quick too and without turbulence. Thank you for the great flying experience.

Delta is one of the best airlines I have flown

Made the Atlanta to Pittsburgh trip many times, with Delta no issues

I always fly with Delta. My friends tell me their horror stories of flying with other airlines. I just smile and say, “You should fly Delta”

I'm a larger, athletic guy (6'2", 260lbs powerlifter) and I found the seats incredibly uncomfortable with minimal leg room, especially in a window seat. Now, I full understand that being smaller may change my view but even if I was 80lbs less, my legs would be the same size and I was sandwiched between my seat and the seat in front of me.

Horrible. This was not first class. This was a connecting flight whi h was late. My original flight never came. I hated the fact that delta gave me a connecting flight from New York to Orlando Florida. No meals and the television screens were not working. There wasn't even any power to charge your phones. This is NOT FIRST CLASS DELTA!!! Do better next time!

This flight was ridiculous. I had to have a connecting flight from New York to orlando Florida??? The flight left late and because it was a short flight there was no first class amenities. I had one alcohol drink. The flight crew was fine, but it sure did not feel like first class. Delta to me dropped the ball by giving me a connecting flight. By the time we got to Raleigh we would have missed the next flight. Lucky for me the flight never came so now I was stuck waiting for a later flight that came in late also.

Our flight was delayed in Atlanta. The staff could have gave us an explanation for the delay and how long it would be.

I liked the ease of checking in, luggage check in, wheel chair assistance, boarding and flight.

On my way home I had a layover. The flight from ATL to CLT was amended 5x while I was waiting. I could have driven home sooner. Overall from Dallas, Tx to Charlotte, NC I started my trip at 4:30pm, I didn’t get home until past midnight. I know things happen, but 5x to make me run back and forth in an airport from different terminals is excessive. I also upgraded to comfort + , I didn’t feel it was worth it. There was no benefit

Very comfortable Prem economy seats for a long haul flight. Had a problem with the tv that the crew fixed so was great!

Cathay Pacific seems to be an airline in trouble and on its way out. Lots of broken or poorly functioning things like entertainment screens, seats, and enough well trained staff to handle a full flight. Sad...

The flight crew was exceptionally good. Personal needs were well met. The food choices were very nice.

Excellent. Planes are a little older and could get some refurbishment, but besides that everything was excellent.

While I was in great pain, the seat was sufficiently comfortable to allow me to rest and not be in so much pain.

we were upgraded which was a blessing and tender mercy for us. I fell the day before and was in extreme pain from knee to shoulder. Sitting in a more comfortable seat during the flight was an unexpected blessing and experience.

Seats were very comfortable. Crew were excellent. Food very good.

Flight crew was especially thoughtful and attentive, made sure our seats were comfortable so we could rest on the long flight

I felt thirsty and asked the flight attendent for water, but no one came for more than half an hour.

Everything went smooth. All flights were on time No changing gates, . No changing flights . It was like a completely different airlines tha n the last time I used Cathay Pacific . The last flight, 2 months ago, I had before this one was from Philippines also . I got changed in Manila and was told it only added 2 hours onto my flight . My 20 hour return trip ended up being 30 hours return with a 10.0 hour layover in New York with no seats anywhere . Everyone was sleeping or sitting on the floor . Unlike the hotel I was given in Manila to wait for this flight home . I never thought I would use Cathay Pacific again . But I did and this time you were great! I should have complained about the flight and layover from Hell a couple months ago. Consider that I am complaining about that august/23 flight now . Thank you got the great flying experience on my way home from philippines .

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

Amazing comfortable chairs great snacks super friendly staff pilots did excellent job. Smooth sailing all the way. Definitely be flying United more.

We waited too long to get water while the plane was on the Tarmac awaiting de-icing.

Easy peasy. Crew was great. Take-off and landing nice anc chill (good job by the pilot). Thank you UA!

The plane was delayed coming in and on the tarmac. I was coming from another flight so it made for a very long day. The stewardess kept trying to slam the overhead bins closed and I was worried that she had damaged my new luggage. They ran out of snacks and lccdsddd me a hummus box which was nice. It took them a very long time to pick up the garbage so I could not go to the washroom and had little time. To prepare for disbarment. The TV system was hard to control from the armrest and picture wasn’t clear. The crew did apologize several times for the lateness. It took the Denver airport an unusually long time to de-ice the plane.

By in large it was a good experience. The flight crew was great and that's the most important to me. Boarding was fine.

It was fine. Everything ran on time, crew was great.

Flight delayed over an over all day until it cancelled at 1:30am. Would not repeatedly delay that late. Offer hotel rooms and rebook early. Very difficult for families with small children

this is starting to seem like an american airlines standard. delayed flights and fake apologies… getting tired of it

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.

The Flight attendant had an attitude and didn't allow anyone any time to prepare for landing despite being absent throughout the entire trip

Flight boarded without pilots. Sat on plane for 3 hrs. after over an hour late boarding. Plane never took off. Had to deplane near midnight. Line for rebooking was 3 hours + long. I had to leave.

The flight was great but board was a nightmare. The gate was changed 4 times during the layover period

The experience was great and much better than the flight going out. of course I was in first class but the service was excellent

Cold air blew constantly on my legs almost making me numb.

Not much seat room, but that was unexpected. But the seat headrest was very uncomfortable.

First the good, everyone was friendly and efficient. Flight was smooth and plane was very clean and new. Now the bad, seats have almost no padding on your behind. I was in exit row so I had tons of leg room for a 6' 2" bean pole with long legs. Everything was extra - water, soda, snacks everything besides oxygen. Ya get what you pay for, and my flight was cheap as you could ever want it, so no worries.

First the good, everyone was friendly and efficient. Flight was smooth and plane was very clean and new. Now the bad, seats have almost no padding on your behind. I was in exit row so I had tons of leg room for a 6' 2" bean pole with long legs. Everything was extra - water, soda, snacks everything besides oxygen. Ya get what you pay for, and my flight was cheap as you could ever want it, so no worries. They dont really bother you about carry-on size, I brought a descent sized backpack and they didnt even check.

Spirit canceled the flight in March and never notified me!

Seats suck, not enough room, overcrowded planes, hectic situation all together.

Pretty good. Would’ve been excellent if we would have left on time and the crew wasn’t late.

I do not like the customer service, I had an emergency and needed to cancel a pet reservation right after I had booked it and they would not do anything but issue a credit. I haven't flown in years as I have 7 kids and don't have spare time. I want my $125 back on my card please

Spirit airline tries to screw you at every opportunity. Spirit wanted 65$ for an extra pound in the suitcase Made me open the suitcase at the counter to remove 1 pound. Staff very cold and rude Will never fly spirit again and will recommend same to family and friends

Delayed..4 times...completely disorganized boarding. After 5 hours they scrambled to move ppl off plane bc they overbooked. Then they didn't have a cabin crew. WiFi on plane didn't work. Zero amenities. Once we boarded we sat on tarmac for an hour. Explore all alternate options including purchasing a pair of hiking boots and walking to your destination instead of flying spirit.

what I like about Spirit is that the pilot and crew are good communicators. The plane itself - well, its a budget airline and you get what is expected, But I generally just feel safer, somehow, when I know more about what is going on - and Spirit has always done a good job of telling me what is going on: why the delay, why the turbulence, why this and that... and that means a lot to me.

Book cheap flights from St. Louis to Colorado

Recent round-trip flight deals

6/12Wed
nonstopFrontier
2h 31mSTL-DEN
6/19Wed
nonstopFrontier
2h 10mDEN-STL
$57
5/25Sat
nonstopFrontier
2h 31mSTL-DEN
6/1Sat
nonstopFrontier
2h 10mDEN-STL
$58
10/2Wed
nonstop
2h 28mSTL-DEN
10/5Sat
1 stop
7h 15mDEN-STL
$143
6/27Thu
nonstop
2h 30mSTL-DEN
7/4Thu
1 stop
14h 39mDEN-STL
$149
5/31Fri
1 stopDelta
6h 42mSTL-DEN
6/3Mon
1 stopDelta
7h 35mDEN-STL
$187
6/12Wed
1 stopDelta
5h 23mSTL-DEN
6/18Tue
1 stopDelta
5h 52mDEN-STL
$198
10/2Wed
1 stopAmerican Airlines
6h 54mSTL-DEN
10/6Sun
1 stopAmerican Airlines
6h 03mDEN-STL
$227
7/5Fri
1 stopAmerican Airlines
10h 03mSTL-DEN
7/13Sat
1 stopAmerican Airlines
6h 42mDEN-STL
$262
5/14Tue
1 stopUnited Airlines
4h 37mSTL-GJT
5/17Fri
1 stopUnited Airlines
6h 29mGJT-STL
$452
9/16Mon
1 stopUnited Airlines
5h 20mSTL-ASE
9/23Mon
1 stopUnited Airlines
10h 56mASE-STL
$533

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Recent one-way flight deals

6/26Wed
nonstopFrontier
2h 31mSTL-DEN
$39
5/19Sun
nonstopFrontier
2h 27mSTL-DEN
$40
5/26Sun
1 stopSun Country Air
15h 40mSTL-DEN
$69
8/14Wed
1 stopAmerican Airlines
6h 07mSTL-DEN
$78
8/7Wed
1 stopAmerican Airlines
4h 33mSTL-COS
$79
6/16Sun
1 stopSun Country Air
14h 06mSTL-DEN
$91
8/6Tue
1 stopDelta
5h 10mSTL-COS
$98
6/25Tue
1 stopDelta
5h 34mSTL-DEN
$99
8/8Thu
1 stopUnited Airlines
4h 39mSTL-COS
$138
6/6Thu
nonstopUnited Airlines
2h 27mSTL-DEN
$149

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Last minute flights from St. Louis to Colorado

Last minute flight, train and bus deals

5/1Wed
multi-stopFrontier
21h 20mSTL-DEN
5/8Wed
nonstopFrontier
2h 06mDEN-STL
$188
5/1Wed
multi-stopFrontier
11h 20mSTL-DEN
5/4Sat
nonstopFrontier
2h 06mDEN-STL
$189
5/1Wed
multi-stopDelta
5h 50mSTL-DEN
5/6Mon
multi-stopDelta
7h 35mDEN-STL
$492
5/2Thu
multi-stopDelta
6h 02mSTL-DEN
5/4Sat
multi-stopDelta
7h 11mDEN-STL
$512
4/28Sun
nonstopUnited Airlines
2h 25mSTL-DEN
4/28Sun
nonstopUnited Airlines
2h 04mDEN-STL
$591
4/28Sun
multi-stopAmerican Airlines
5h 54mSTL-DEN
4/28Sun
multi-stopAmerican Airlines
9h 14mDEN-STL
$609
4/28Sun
multi-stopUnited Airlines
6h 08mSTL-DEN
4/30Tue
multi-stopUnited Airlines
23h 18mDEN-STL
$670
4/30Tue
multi-stopAmerican Airlines
7h 52mSTL-EGE
5/1Wed
multi-stopAmerican Airlines
5h 57mEGE-STL
$672
4/28Sun
multi-stopAlaska Airlines
10h 32mSTL-DEN
5/2Thu
multi-stopAlaska Airlines
29h 27mDEN-STL
$709
4/28Sun
multi-stopAlaska Airlines
10h 32mSTL-DEN
5/2Thu
multi-stopAlaska Airlines
12h 06mDEN-STL
$807

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St. Louis - Colorado Flights

Departure:

St. Louis (STL)United States

Return flight deals:

Colorado - St. Louis

Cabin classes:

$607
$1,351
$833
$59