STL - ASE

$209 Find Cheap Flights from St. Louis to Aspen

This is the cheapest round-trip flight price found by a KAYAK user in the last 72 hours by searching for a flight from St. Louis to Aspen departing on 2/23. 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, 0 bags

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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Everything you should know

Cheapest round-trip
$269
United Airlines
Mon 2/23Tue 3/10
STL - ASE • 1 stop
Cheapest one-way
$321
Typical prices: $247-$429
Delta
Mon 2/9
STL - ASE • 1 stop
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We hope you love your trip to Aspen!
Flight Deals
Booking Insights
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

Mon, Feb 23 - Tue, Mar 10
United Airlines Logo
9:55 am - 3:20 pm
STL
-
ASE
6h 25m
1 stop
United Airlines Logo
1:22 pm - 8:41 pm
ASE
-
STL
6h 19m
1 stop
$269United Airlines
Mon, Feb 23 - Tue, Mar 10
United Airlines Logo
4:30 pm - 9:34 pm
STL
-
ASE
6h 04m
1 stop
United Airlines Logo
2:27 pm - 10:59 pm
ASE
-
STL
7h 32m
2 stops
$274United Airlines
Mon, Feb 23 - Tue, Mar 10
United Airlines Logo
9:55 am - 3:20 pm
STL
-
ASE
6h 25m
1 stop
United Airlines Logo
6:28 pm - 11:34 pm
ASE
-
STL
4h 06m
1 stop
$339United Airlines
Mon, Feb 23 - Tue, Mar 10
United Airlines Logo
7:41 am - 5:40 pm
STL
-
ASE
10h 59m
2 stops
United Airlines Logo
1:22 pm - 10:59 pm
ASE
-
STL
8h 37m
2 stops
$349United Airlines
Fri, Jul 3 - Wed, Jul 8
United Airlines Logo
5:15 am - 8:43 am
STL
-
ASE
4h 28m
1 stop
United Airlines Logo
2:22 pm - 10:44 pm
ASE
-
STL
7h 22m
2 stops
$375United Airlines
Mon, Feb 16 - Fri, Feb 20
United Airlines Logo
8:17 am - 3:20 pm
STL
-
ASE
8h 03m
1 stop
United Airlines Logo
3:29 pm - 8:26 pm
ASE
-
STL
3h 57m
1 stop
$481United Airlines
Mon, Feb 16 - Fri, Feb 20
United Airlines Logo
6:00 pm - 9:34 pm
STL
-
ASE
4h 34m
1 stop
United Airlines Logo
12:22 pm - 10:14 pm
ASE
-
STL
8h 52m
2 stops
$522United Airlines
Mon, Feb 16 - Fri, Feb 20
United Airlines Logo
7:41 am - 4:47 pm
STL
-
ASE
10h 06m
2 stops
United Airlines Logo
12:22 pm - 9:05 pm
ASE
-
STL
7h 43m
2 stops
$561United Airlines
Mon, Feb 16 - Fri, Feb 20
United Airlines Logo
6:00 am - 12:41 pm
STL
-
ASE
7h 41m
1 stop
United Airlines Logo
12:22 pm - 10:14 pm
ASE
-
STL
8h 52m
2 stops
$566United Airlines
Fri, Jul 3 - Wed, Jul 8
United Airlines Logo
9:23 am - 5:26 pm
STL
-
ASE
9h 03m
2 stops
United Airlines Logo
2:22 pm - 10:44 pm
ASE
-
STL
7h 22m
2 stops
$620United Airlines
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 is the most popular layover airport when flying from St. Louis to Aspen?

Percentage of 1-stop round-trip flights from St. Louis to Aspen chosen by KAYAK users via each layover airport in the last 12 months (only includes trips with the same layover airport on both legs).

Denver (DEN) is the top choice – 84% of KAYAK users who clicked on 1-stop flights from St. Louis to Aspen picked an itinerary connecting there.

What is the cheapest layover airport when flying from St. Louis to Aspen?

Average round-trip price for 1-stop flights from St. Louis to Aspen clicked by KAYAK users in the last 12 months (only includes trips with the same layover airport on both legs).

Flights via Denver (DEN) offer the most affordable fares, with an average round-trip price of $627.

Which layover airport offers the shortest total travel time from St. Louis to Aspen?

Shortest average total travel time for 1-stop one-way flights from St. Louis to Aspen via different layover airports, based on KAYAK user data from the last 12 months.

Consider flying via Denver (DEN) for the shortest journey. The average one-way travel time for flights connecting there is 4h 31m.

Which layover airport has the quickest connection when flying from St. Louis to Aspen?

Average layover duration at different layover airports for 1-stop one-way flights from St. Louis to Aspen, based on KAYAK user data from the last 12 months.

If you prefer a quick connection, Chicago (ORD) often has the shortest layovers from St. Louis to Aspen, with an average of 0h 46m.

Good to know

Low seasonDecember
Cheapest flight$269
Best time to beat the crowds with an average 34% drop in price.
Most popular time to fly and prices are also 25% lower on average.
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 $209 for a one-way ticket and $269 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, and Star Alliance are the airline alliances operating flights between St. Louis and Aspen, with oneworld 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 $477 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 $392 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 9236 reviews
7.3Comfort
7.1Entertainment
6.6Food
7.7Boarding
8.1Crew
Airline reviews

HORRIBLE, my initial flight was cancelled, they made me pay $200 extra dollars and that got cancelled as well! After 6 cancellations I decided to get a refund because I needed to get home to my babies. Out of $1000+ dollars they offered me only $40 in refund! Totally unacceptable! The flight that they cancelled I was able to fly it on another airline. I had to spend $400 on one way tickets just to get home! I’m still getting the runaround.

2.0 MediocreSonje’, Jan 2026
STL - EWR
Read more United Airlines reviews

HORRIBLE, my initial flight was cancelled, they made me pay $200 extra dollars and that got cancelled as well! After 6 cancellations I decided to get a refund because I needed to get home to my babies. Out of $1000+ dollars they offered me only $40 in refund! Totally unacceptable! The flight that they cancelled I was able to fly it on another airline. I had to spend $400 on one way tickets just to get home! I’m still getting the runaround.

The flight was delayed by two de-icings. The seatbelt did not work correctly. It did not stay tight.

Hotter than Hades in August. Why, why do crews think that in the winter when we are already dressed for cold weather we need a cabin that is 82 degrees. Even the vents were blowing hot air.

Flight was delayed. De-icing took a while. When we landed had to wait for another plane to vacate our gate. Just an overall bad experience.

Not good - outbound flight was delayed and missed my connection even though I got to the gate after running through the airport - the agent would not let me on because the door was closed (flight had not left). There was no notification from United - overall experience was very disappointing. Additionally, I was downgraded from first class to coach on the alternative flight

United have really come back. Airport and boarding process is clear and good, app and information also very good

Flight was delayed only slightly before takeoff due to traffic control. However, the flight arrived early to ORD. Good flight. United has been very reliable for me.

The entertainment available didn’t work for anyone on the flight. Long 6 hr flight with no entertainment option and the staff didn’t know until an hour into the flight when we made sure they knew about it. They had no way to fix it.

Late FA meant slow boarding. WiFi did not work. I’m a medium plus sized passenger. The seatbelt was for the first time ever barely fitting. And we delayed on the tarmac 40 min

My husband and I had boarded the flight from Denver to Chicago, and one of the last passengers to get on the plane opened the overhead bin above my husband's seat and threw his bag out of the bin to make space for his own. He said, "Mine is bigger!" The flight attendant supported the new passenger. They didn't care that my husband has two artificial knees and must have the foot room in front of his seat to be able to fit his legs in -- and to be able to stand, much less walk, at the end of the flight. I have never seen this happen before, and it was a disaster.

The screens were inoperable for movies and such, but everything else was just fine

For a 5 1/2 hour flite i considered the "business class" to be subpar. The seats were just ok, no amenities, really nothing more than a long domestic flight. Frankly disappointed.

Delayed an hour due to operational issues. Minimal apologies or care for the significant inconvenience caused. Landed at nearly 1am and they still couldn’t find ground staff to get us off the plane promptly.

This was one of the most frustrating travel experiences I've had to date. I had changed my flight day of to this one as it was slated to depart on time. It ended up being so delayed that my original flight took off before this one did. The boarding process began but eventually stopped and everyone had to get off the plane as a problem was identified. The person at the front desk just tried to laugh it off as if this wasn't already a huge inconvenience. From there, we eventually got to board only to sit at the gate for an additional hour because of some additional issue. This was extremely frustrating and caused a lot of stress.

Update to handle the delay was very bad, crews no smiles or welcome or thanks. Don’t care attitude

It would be nice to have some low carb options in the snacks.

I was trying to take 2 one and a half hour one way trips and I experienced almost 20 delays over the course of those two trips. Only a few of them were due to weather the rest was disorganization

No gates avail at DFW so our incoming had to wait 30 mins for a plane to push back because they Had mechanical. We boarded 90 mins delayed and then we had a mechanical. Come on American…do better. Also at my seat the tray table had not been cleaned. Floor had not been cleaned. But captain and flight Att were very picture and apologetic.

Crew was helpful and cheerful especially when they had no refreshments to work with. The plane was never serviced and had nothing but limited water and coffee onboard. For the price point, a concern of services.

Flight was smooth, quick and felt safe. The 2 delays not happening would have been better but I guess that happens in the airline industry

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

Information on your arrival and departure airports