STL - ASE

$302 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 8/13. 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
$335
Typical prices: $458-$1,069
United Airlines
Thu 8/13Mon 8/17
STL - ASE • 1 stop
Nonstop flights
Not available
There are currently no direct flights between St. Louis and Aspen. You'll need at least 1 connection.
Insights
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Top layover airports
Denver (DEN)
Cheapest • Avg $632 (round-trip)
Denver (DEN)
Shortest trip • 4h 31m (one-way)
Insights
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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

Thu, Aug 13 - Mon, Aug 17
United Airlines Logo
5:20 am - 8:51 am
STL
-
ASE
4h 31m
1 stop
United Airlines Logo
5:00 pm - 11:43 pm
ASE
-
STL
5h 43m
1 stop
$335United Airlines
Fri, May 29 - Sun, May 31
United Airlines Logo
4:48 pm - 8:11 pm
STL
-
ASE
4h 23m
1 stop
United Airlines Logo
6:12 pm - 11:57 pm
ASE
-
STL
4h 45m
1 stop
$339United Airlines
Fri, May 29 - Sun, May 31
United Airlines Logo
9:23 am - 6:29 pm
STL
-
ASE
10h 06m
2 stops
United Airlines Logo
6:12 pm - 11:57 pm
ASE
-
STL
4h 45m
1 stop
$344United Airlines
Wed, Mar 11 - Sun, Mar 15
United Airlines Logo
5:00 am - 11:41 am
STL
-
ASE
7h 41m
1 stop
United Airlines Logo
5:16 pm - 11:34 pm
ASE
-
STL
5h 18m
1 stop
$399United Airlines
Fri, Mar 13 - Tue, Mar 17
United Airlines Logo
6:05 pm - 9:42 pm
STL
-
ASE
4h 37m
1 stop
United Airlines Logo
7:56 am - 4:23 pm
ASE
-
STL
7h 27m
1 stop
$404United Airlines
Fri, Mar 13 - Tue, Mar 17
United Airlines Logo
6:05 pm - 9:42 pm
STL
-
ASE
4h 37m
1 stop
United Airlines Logo
12:22 pm - 9:07 pm
ASE
-
STL
7h 45m
2 stops
$410United Airlines
Fri, May 29 - Sun, May 31
United Airlines Logo
5:10 am - 10:51 am
STL
-
ASE
6h 41m
1 stop
United Airlines Logo
12:39 pm - 9:16 pm
ASE
-
STL
7h 37m
1 stop
$449United Airlines
Wed, Mar 11 - Sun, Mar 15
United Airlines Logo
7:40 am - 5:40 pm
STL
-
ASE
11h 00m
2 stops
United Airlines Logo
5:16 pm - 11:34 pm
ASE
-
STL
5h 18m
1 stop
$454United Airlines
Thu, Jul 16 - Mon, Jul 20
United Airlines Logo
5:10 am - 8:46 am
STL
-
ASE
4h 36m
1 stop
United Airlines Logo
1:07 pm - 8:43 pm
ASE
-
STL
6h 36m
1 stop
$503United Airlines
Fri, May 29 - Sun, May 31
United Airlines Logo
9:23 am - 5:26 pm
STL
-
ASE
9h 03m
2 stops
United Airlines Logo
11:32 am - 9:16 pm
ASE
-
STL
8h 44m
2 stops
$558United 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 – 85% 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 $632.

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 seasonJune
Cheapest flight$335
Best time to beat the crowds with an average 39% drop in price.
Most popular time to fly and prices are also 21% 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 $302 for a round-trip ticket.

  • 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 $474 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 9349 reviews
6.6Food
7.7Boarding
8.1Crew
7.3Comfort
7.1Entertainment
Airline reviews

We got delayed three hours and nobody thought to have the bathroom fixed while we were sitting waiting to board? took a full hour to have maintenance come and check it off. Had to shut the bathroom down twice so that the pilots could go to the bathroom. Everyone missed their connections.

2.0 MediocreCameron, Feb 2026
GRR - DEN
Read more United Airlines reviews

We got delayed three hours and nobody thought to have the bathroom fixed while we were sitting waiting to board? took a full hour to have maintenance come and check it off. Had to shut the bathroom down twice so that the pilots could go to the bathroom. Everyone missed their connections.

Women boarding passengers at the gate was absolutely rude and disrespectful of passengers. The flight attendant was absolutely delightful! Smiling and connected with the passengers. So happy. The seats are cramped and uncomfortable but I guess that’s just the way it is Communication regarding flight was excellent

As great a red-eye flight as red-eye flights can be.

Both of my flights arrived early and check in process was smooth

Everything was on time Will use united again for sure

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

Lack of gluten free options in food service. I have Celiac disease and it appears you no longer offer special meals for people with dietary restrictions. I am a frequent flyer traveling into and out of Omaha airport. I have noticed over the course of several months that although our flight typically arrives ahead of schedule (awesome job AA!) - we typically sit on the runway for several minutes waiting for the ground crew to get in place. Not sure if it is a ground crew issue or a gate availability issue (due to construction at this airport). Seems to be more of a ground crew being on time issue.

Arrived early picked up my bag in a few minutes- great trip - thank you

Flight boarded, departed and landed on time. Excellent service from flight attendant in FIRST

Boarding is always an ordeal. Less dogs on flights. I am highly allergic to dogs and cats. Why are there so many animals these days?

Flight to Tampa was delayed taking off due to plane arriving late but no other issues

There was a delay with the plan which cause the flight to leave later and once arrived in Chicago there was another delay and some passengers missed their connecting flights

Massimo, flight attendant was very authentic, attentive - wonderful. Food/wrap was just okay.

Worst experience ever. Flight could not land in Charlotte for what we were told was a ground stop. Had to be diverted to Raleigh to refuel. Strangely during ground stop, our connecting flight had no issue taking off on time causing us to miss our flight. We were told there were no other flights that day to our final destination and that two days out was the next one. The only flights to get us there were from Chicago the next morning. Completely opposite direction but it was a direct flight. So we get flown to Chicago and have to find a hotel in our own dime. The flight in the morning was also delayed. Thankfully only a short time. The non too of all this, our luggage did not arrive by the time we were there. Communication was terrible, through the entire trip. Complete incompetence. Will never fly American again.

I am an AA flyer for a very long time... AA has yet to disappoint.

Flight was delayed. Not much information on when the flight would take off. Eventually we were told it was maintenance. App was not giving updates.

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

Information on your arrival and departure airports