STL - ASE

$189 Find Cheap Flights from St. Louis to Aspen

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 Aspen departing on 9/14. 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 Aspen

 
These are the airlines KAYAK users have selected most often from within our search results in flight searches from St. Louis to Aspen, 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 St. Louis to Aspen, as well as popular online travel agencies
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Flight Deals

Cheap Flights from St. Louis to Aspen (STL-ASE)

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from St. Louis to Aspen 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 St. Louis to Aspen

Tue, Jan 20 - Tue, Jan 27
American Airlines Logo
7:09 am - 12:01 pmSTL-ASE
5h 52m1 stop
American Airlines Logo
10:13 am - 4:14 pmASE-STL
5h 01m1 stop
$229American Airlines
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Wed, Feb 4 - Mon, Feb 9
American Airlines Logo
7:09 am - 2:20 pmSTL-ASE
8h 11m1 stop
American Airlines Logo
3:53 pm - 9:49 pmASE-STL
4h 56m1 stop
$303American Airlines
Find Deal
Tue, Jan 20 - Tue, Jan 27
United Airlines Logo
10:30 am - 8:30 pmSTL-ASE
11h 00m2 stops
United Airlines Logo
1:00 pm - 8:59 pmASE-STL
6h 59m1 stop
$304United Airlines
Find Deal
Tue, Jan 20 - Tue, Jan 27
American Airlines Logo
7:09 am - 2:20 pmSTL-ASE
8h 11m1 stop
American Airlines Logo
12:10 pm - 10:27 pmASE-STL
9h 17m2 stops
$308American Airlines
Find Deal
Wed, Feb 4 - Mon, Feb 9
American Airlines Logo
5:57 am - 2:37 pmSTL-ASE
9h 40m1 stop
American Airlines Logo
3:53 pm - 9:49 pmASE-STL
4h 56m1 stop
$343American Airlines
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Tue, Aug 26 - Wed, Sep 3
United Airlines Logo
4:40 pm - 9:19 pmSTL-ASE
5h 39m1 stop
United Airlines Logo
8:45 am - 4:33 pmASE-STL
6h 48m1 stop
$349United Airlines
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Tue, Aug 26 - Wed, Sep 3
United Airlines Logo
8:10 am - 4:54 pmSTL-ASE
9h 44m2 stops
United Airlines Logo
3:31 pm - 8:46 pmASE-STL
4h 15m1 stop
$354United Airlines
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Sun, Jan 18 - Thu, Jan 22
Delta Logo
6:00 am - 11:49 amSTL-ASE
6h 49m1 stop
Delta Logo
3:00 pm - 11:40 pmASE-STL
7h 40m1 stop
$377Delta
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Thu, Sep 18 - Mon, Sep 22
United Airlines Logo
5:15 am - 10:50 amSTL-ASE
6h 35m1 stop
United Airlines Logo
9:05 am - 6:23 pmASE-STL
8h 18m1 stop
$380United Airlines
Find Deal
Sun, Jan 18 - Thu, Jan 22
United Airlines Logo
10:30 am - 6:26 pmSTL-ASE
8h 56m2 stops
United Airlines Logo
7:45 am - 12:43 pmASE-STL
3h 58m1 stop
$452United Airlines
Find Deal
Booking Insights

KAYAK's insights & trends for St. Louis to Aspen flights

Get data-powered insights and trends into flights from St. Louis to Aspen 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 St. Louis to Aspen?

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

For St. Louis to Aspen, Tuesday is the cheapest day to fly on average and Thursday is the most expensive. Flying from Aspen back to St. Louis, the best deals are generally found on Thursday, with Friday being the most expensive.

Good to know

Low seasonNovember
Cheapest flight$189
Best time to beat the crowds with an average 37% drop in price.
Most popular time to fly with an average 35% increase in price.
Flight from St. Louis to Aspen

When to book flights from St. Louis to Aspen

Are your dates flexible? Find out the best times to travel from St. Louis to Aspen 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 St. Louis to Aspen

  • What is the cheapest flight from St. Louis to Aspen?

    In the last 3 days, the lowest price for a flight from St. Louis to Aspen was $189 for a one-way ticket and $229 for a round-trip.

  • Do I need a passport to fly between St. Louis and Aspen?

    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 St. Louis to Aspen?

    We unfortunately don’t have that data for this specific route.

  • Which airline alliances offer flights from St. Louis to Aspen?

    oneworld, Star Alliance, and SkyTeam are the airline alliances operating flights between St. Louis and Aspen, with SkyTeam being the most commonly used for this route.

  • Which is the best airline for flights from St. Louis to Aspen, United Airlines or American Airlines?

    The two airlines most popular with KAYAK users for flights from St. Louis to Aspen are United Airlines and American Airlines. With an average price for the route of $650 and an overall rating of 7.4, United Airlines is the most popular choice. American Airlines is also a great choice for the route, with an average price of $508 and an overall rating of 7.2.

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

    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 Aspen.

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

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

    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 Aspen with an airline and back to St. Louis with another airline. Booking your flights between St. Louis and ASE 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 St. Louis to Aspen?

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

Reviews of the top airlines flying from St. Louis to Aspen

 
See real verified KAYAK customer reviews for airlines flying from St. Louis to Aspen. 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 St. Louis to Aspen? 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.
7.4
United AirlinesOverall score based on 8915 reviews
7.1Entertainment
8.1Crew
7.7Boarding
6.6Food
7.3Comfort
Airline reviews

Excellent flight. Boarding was efficient and departure was on time. Smooth flight with on time arrival. Deplaning was also efficient.

10.0 ExcellentDr. Joseph, Aug 2025ORD - DEN
Read more United Airlines reviews

Excellent flight. Boarding was efficient and departure was on time. Smooth flight with on time arrival. Deplaning was also efficient.

Our flight was understandably diverted to a small regional airport in Laramie, Wyoming due to weather conditions, which I fully recognize and appreciate. However, the low rating stems from the experience that followed: passengers remained on board for over an hour without the option to deplane and stretch, despite the aircraft being stationary. Although the pilot opened the cabin door, only he was permitted to exit. Meanwhile, passengers grew increasingly uncomfortable as warm summer air entered the cabin through the open door, and being in the second row meant we were impacted immediately. While the flight attendants made efforts to keep everyone at ease, I believe allowing passengers to deplane briefly, given the extended delay, would have significantly improved the overall experience.

I never flew. Flight was canceled. DIA worst airport in the country. Avoid at all costs.

Overall a very poor experience - booked premium economy tickets but due to last minute flight delays , all my itinery went for a toss and had to fly economy class with no access to lounge or any compensation by united airlines to make up for the flight delays . i had expected better experience than that from united.

Very rough getting into denver. my kid threw up it was so rough.

Why wasn't this flight departure scheduled eith another crew so that it could leave on time? When we arrived in Denver we had so little time between flights we had run to the connecting flight. We should received some credit for the inconvenience.

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

The comfort of the seats was great, the crew eased my child’s anxieties and the fact that I had full cans of my beverage choice was great.

My flight got switched and my prepaid bag didnt transfer over properly so I paid to check ANOTHER BAG. I was placed in a middle seat and it was just miserable. At least it was a bulkhead row so I had legroom. The flight just never seem3d to end

4 hours late, including over +1 hour waiting in plane to take off. Baggage left behind too.

Sat on the ground in Cincinnati for 50 minutes before deplaning

While waiting to claim my checked luggage, I discovered the airline had lost it. After a long wait and inquiries, I discovered it was on another flight. Fortunately, the airline finally sent my luggage home.

Crew should be nicer and emphatic with customers. Same cookies as the past 20 years. Seat are ok and the plane was clean though it was delayed.

Was not able to watch most shows on the entertainment site. They would not load

As smooth as you can expect. Some issues with boarding because the previous plane took forever to deplane but overall, a good experience.

On Wednesday, July 30 we were in mid flight from Manchester to Charlotte and we turned around because the right engine was malfunctioning. That was the last flight out of Manchester that night. I was rebooked for Thursday, which became a weather event Friday. There were no seats left on the flight from Manchester to Charlotte. Consequently I didn’t leave Manchester until Saturday morning and we flew to Chicago so to say the least my scheduled flight and return to Iowa was three days off and it messed with my business schedule. Consequently cash flow. I would like some sort of acknowledgment of this event.

There is no room, no gluten free options, or any free internet/entertainment. You have to bring your own tablet or smartphone because there are no screens.

Everything you need to know for your flight from St. Louis to Aspen

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