STL - ASE

$329 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 4/17. 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
$329
Typical prices: $993-$557
United Airlines
Fri 4/17Tue 4/21
STL - ASE • 1 stop
Top airlines
Cheapest • from $329 (round-trip)
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
Cheapest • Avg $625 (round-trip)
Shortest trip • 4h 32m (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

Fri, Apr 17 - Tue, Apr 21
United Airlines Logo
6:05 pm - 9:48 pm
STL
-
ASE
4h 43m
1 stop
United Airlines Logo
1:25 pm - 8:54 pm
ASE
-
STL
6h 29m
1 stop
$329United Airlines
Fri, Apr 17 - Tue, Apr 21
United Airlines Logo
6:30 am - 11:33 am
STL
-
ASE
6h 03m
1 stop
United Airlines Logo
12:14 pm - 9:13 pm
ASE
-
STL
7h 59m
2 stops
$334United Airlines
Thu, Sep 10 - Mon, Sep 14
American Airlines Logo
5:40 am - 10:04 am
STL
-
ASE
5h 24m
1 stop
American Airlines Logo
7:30 am - 2:45 pm
ASE
-
STL
6h 15m
1 stop
$394American Airlines
Fri, Apr 17 - Tue, Apr 21
United Airlines Logo
7:45 am - 4:35 pm
STL
-
ASE
9h 50m
2 stops
United Airlines Logo
9:15 am - 11:57 pm
ASE
-
STL
13h 42m
2 stops
$479United Airlines
Thu, Jul 16 - Sun, Jul 19
United Airlines Logo
5:10 am - 10:51 am
STL
-
ASE
6h 41m
1 stop
United Airlines Logo
5:10 pm - 11:57 pm
ASE
-
STL
5h 47m
1 stop
$613United Airlines
Thu, May 21 - Sun, May 31
United Airlines Logo
5:10 am - 9:26 pm
STL
-
ASE
17h 16m
1 stop
United Airlines Logo
9:00 am - 3:46 pm
ASE
-
STL
5h 46m
1 stop
$637United Airlines
Thu, Sep 10 - Mon, Sep 14
American Airlines Logo
7:44 am - 8:16 pm
STL
-
ASE
13h 32m
2 stops
American Airlines Logo
7:30 am - 2:45 pm
ASE
-
STL
6h 15m
1 stop
$698American Airlines
Thu, May 28 - Mon, Jun 8
United Airlines Logo
5:10 am - 8:46 am
STL
-
ASE
4h 36m
1 stop
United Airlines Logo
6:12 pm - 11:57 pm
ASE
-
STL
4h 45m
1 stop
$769United Airlines
Thu, Jul 16 - Sun, Jul 19
American Airlines Logo
6:00 am - 1:51 pm
STL
-
ASE
8h 51m
2 stops
American Airlines Logo
7:36 am - 4:33 pm
ASE
-
STL
7h 57m
1 stop
$952American Airlines
Thu, May 21 - Sun, May 31
United Airlines Logo
5:10 am - 9:26 pm
STL
-
ASE
17h 16m
1 stop
United Airlines Logo
9:00 am - 3:46 pm
ASE
-
STL
5h 46m
1 stop
$988United 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.

How much is a round-trip flight from St. Louis to Aspen?

This analysis is based on the cheapest round-trip price found on KAYAK in the last 12 months by searching for a flight from St. Louis to Aspen departing in April.

Good to know

Low seasonDecember
Cheapest flight$329
Best time to beat the crowds with an average 37% 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 $329 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 $472 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 $403 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 9538 reviews
7.3Comfort
6.6Food
7.7Boarding
8.1Crew
7.1Entertainment
Airline reviews

I had a cancelled flight because of technical issues going to my destination, and a delayed flight coming home. All told it wasn’t a total bust.

8.0 ExcellentAnonymous, Apr 2026
SMF - DEN
Read more United Airlines reviews

I had a cancelled flight because of technical issues going to my destination, and a delayed flight coming home. All told it wasn’t a total bust.

During landing. 2 crew members passed 3 times by my lane and didn't notice that people in front of us had their site to the furthermore reclined... That was uncomfortable and could have been dangerous.

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.

Seat was VERY uncomfortable. Flight was delayed and then boarded slowly. The crew was super helpful with boarding and supporting maximizing the luggage in the overhead.

Crew at the gate was very crabby and not at all polite. The plane was very hot the entire flight. And the seat cushion was very worn out.

Incoming flight was delayed, delaying boarding. It then took 30 mins to take off. Took 20 mins to get to a gate because they changed the gate last minute, crew weren’t ready so there was no one staffed to work the jet bridge. Boarding was so disorganized as is usual with American because everyone just stands around the gate regardless of boarding group.

Early morning flight and no food in First Class except a "salmon" box. No thank you. Was informed before take off by Captain that the plane was not serviced before we boarded in Phoenix. How does that happen? Need more frequent additions/turn over on the Entertainment. Thanks

Moved to earlier flight which unexpectedly had maintenance issues initially indicated as quick fix to ultimately plane changes. Moved back to original flight, also delayed. In all cases customer updates and communication very unclear, no updates on drivers for delays.

Flight was delayed. No urgency by American Airlines team to assist those with connecting flights. It was basically you are on your own to run through the terminals to try and make your connection. Thanks, Mary

I have never been assaulted they way I was today in Charlotte - shame on American

One of our group members was struggling to walk. In Charlotte we asked for a wheelchair and she was accompanied by Desmond. I was impressed by his patience and attention. In Boston she received the same service. I didn’t get the name of the helper but she went above and beyond in assisting us. A great AA service

Better snacks but flight and crew were amazing on this flight

Found that the plane used for this short flight is smaller and therefore the seats are really squeezed tight.

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

Information on your arrival and departure airports