STL - ASE

$289 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 3/24. 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
$289
American Airlines
Tue 3/24Sat 3/28
STL - ASE • 1 stop
Top airlines
American Airlines
Cheapest • from $289 (round-trip)
United Airlines
Best reviews • 7.4 score
Airline reviews
Airline reviews
+1
+1
Airline reviews
Airline reviews
+1
Nonstop flights
Not available
There are currently no direct flights between St. Louis and Aspen. You'll need at least 1 connection.
Insights
Insights
Insights
Insights
Top layover airports
Denver (DEN)
Cheapest • Avg $626 (round-trip)
Denver (DEN)
Shortest trip • 4h 31m (one-way)
Insights
Insights
Insights
Insights
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KAYAK searches 100s of sites at once to find you the best travel deals.
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

Tue, Mar 24 - Sat, Mar 28
American Airlines Logo
5:12 am - 10:11 am
STL
-
ASE
5h 59m
1 stop
American Airlines Logo
1:28 pm - 9:11 pm
ASE
-
STL
6h 43m
1 stop
$289American Airlines
Fri, Mar 20 - Tue, Mar 24
United Airlines Logo
2:50 pm - 6:40 pm
STL
-
ASE
4h 50m
1 stop
United Airlines Logo
2:27 pm - 10:59 pm
ASE
-
STL
7h 32m
2 stops
$294United Airlines
Wed, Apr 8 - Wed, Apr 15
United Airlines Logo
6:05 pm - 9:48 pm
STL
-
ASE
4h 43m
1 stop
United Airlines Logo
10:15 am - 4:56 pm
ASE
-
STL
5h 41m
1 stop
$309United Airlines
Wed, Apr 8 - Wed, Apr 15
United Airlines Logo
8:54 am - 12:25 pm
STL
-
ASE
4h 31m
1 stop
United Airlines Logo
2:27 pm - 11:11 pm
ASE
-
STL
7h 44m
2 stops
$314United Airlines
Sun, Apr 5 - Sat, Apr 18
Delta Logo
6:00 am - 11:40 am
STL
-
ASE
6h 40m
1 stop
Delta Logo
1:33 pm - 11:36 pm
ASE
-
STL
9h 03m
1 stop
$334Delta
Sat, Mar 28 - Tue, Mar 31
United Airlines Logo
5:00 am - 10:06 am
STL
-
ASE
6h 06m
1 stop
United Airlines Logo
1:10 pm - 10:28 pm
ASE
-
STL
8h 18m
1 stop
$359United Airlines
Sun, Apr 5 - Wed, Apr 15
Delta Logo
6:00 am - 11:40 am
STL
-
ASE
6h 40m
1 stop
Delta Logo
1:33 pm - 11:36 pm
ASE
-
STL
9h 03m
1 stop
$363Delta
Tue, Mar 24 - Sat, Mar 28
United Airlines Logo
11:25 am - 6:40 pm
STL
-
ASE
8h 15m
2 stops
United Airlines Logo
4:20 pm - 10:59 pm
ASE
-
STL
5h 39m
1 stop
$371United Airlines
Tue, Mar 24 - Sat, Mar 28
United Airlines Logo
11:25 am - 6:40 pm
STL
-
ASE
8h 15m
2 stops
United Airlines Logo
4:20 pm - 10:59 pm
ASE
-
STL
5h 39m
1 stop
$372United Airlines
Sun, Apr 5 - Tue, Apr 14
United Airlines Logo
8:21 am - 3:17 pm
STL
-
ASE
7h 56m
1 stop
United Airlines Logo
3:29 pm - 8:54 pm
ASE
-
STL
4h 25m
1 stop
$379United 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.

Which airlines provide the cheapest flights from St. Louis to Aspen?

The cheapest round-trip price for the route for each airline clicked by KAYAK users in the last 72 hours.

In the past 3 days, the cheapest round-trip tickets from St. Louis to Aspen were found on American Airlines ($289) and United Airlines ($294).

Good to know

Low seasonDecember
Cheapest flight$289
Best time to beat the crowds with an average 38% drop in price.
Most popular time to fly and prices are also 24% 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 $289 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 7.1.

  • 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 9409 reviews
6.6Food
8.1Crew
7.7Boarding
7.3Comfort
7.1Entertainment
Airline reviews

Seats are uncomfortable. This has been a trend in the industry for decades. Trying to fit more seats on each plane to increase profits at the expense of the passenger.

6.0 GoodAnonymous, Mar 2026
SFO - DEN
Read more United Airlines reviews

Seats are uncomfortable. This has been a trend in the industry for decades. Trying to fit more seats on each plane to increase profits at the expense of the passenger.

It’s always a great time flying with united airlines.

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.

I didn't end up taking this flight. I got up at 4am for a flight that was supposed to board at 6am - at 5:55am you delayed the flight to 10am. The airport is under construction so I switched to a later flight as I wasn't going to sit in the airport for 4 hours. They said the delay was due to the crew needing rest from a flight coming in late the night before - if that was the case then I think you should have delayed the flight much sooner so that passengers wouldn't get up so early and get to the airport to sit and wait.

Never had such a lazy first class attendant. Literally spent 60%+ of the flight playing games on her personal phone making up excuses of why she was unavailable.

The flight attendants and the service is getting worse by the day.

Not to have gotten delayed by 2+ hours for the fourth straight American flight. They're the worst.

Like all of the flights I took to get down to Dallas. They were delayed

Other than nearly three hour delay for maintenance issues, everything went smooth

Plane from partner PSA was filthy. Plastic needs to be thoroughly cleaned. Really disgusting to look at and wonder about cleanliness of parts less visible.

The baggage claim experience was poor. The plane crew and the AA app said that checked baggage in CLT would be at carousel 7 but the sign at Baggage Claim said carousel 1. The carousel 1 sign had the correct flight # listed above the belt. But the luggage never came. I went to an AA baggage claim office after about 1 hour and the clerk directed me to another AA room that was poorly marked, with a closed door and no obvious way to know what to do. Finally someone opened the door and my bag was inside. The clerk was totally unable to explain why.

They are rarely on time! Very hard to plan your travels when flights or connections keep getting delayed.

Flight delay for mechanical. Inbound arrived on time. No one said why mechanical delay.

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

Information on your arrival and departure airports