STL - ASE

$239 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 8/6. 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: $488-$400
American Airlines
Sat 6/20Wed 6/24
STL - ASE • 1 stop
Cheapest one-way
$239
United Airlines
Thu 8/6
STL - ASE • 1 stop
Top airlines
American Airlines
Cheapest • from $329 (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 $546 (round-trip)
Denver (DEN)
Shortest trip • 4h 41m (one-way)
Insights
Insights
Insights
Insights
When to travel
April
Cheapest • 100% price drop
January
Most popular
Good to know
Good to know
+1
+1
Good to know
Good to know
+1
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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

Sat, Jun 20 - Wed, Jun 24
American Airlines Logo
5:29 am - 12:21 pm
STL
-
ASE
7h 52m
1 stop
American Airlines Logo
12:51 pm - 9:37 pm
ASE
-
STL
7h 46m
1 stop
$329American Airlines
Tue, Aug 25 - Sat, Aug 29
United Airlines Logo
1:36 pm - 5:18 pm
STL
-
ASE
4h 42m
1 stop
United Airlines Logo
1:15 pm - 10:00 pm
ASE
-
STL
7h 45m
2 stops
$334United Airlines
Tue, Aug 18 - Fri, Aug 21
American Airlines Logo
8:36 am - 1:50 pm
STL
-
ASE
6h 14m
1 stop
American Airlines Logo
7:30 am - 2:42 pm
ASE
-
STL
6h 12m
1 stop
$347American Airlines
Tue, Aug 18 - Fri, Aug 21
United Airlines Logo
8:00 am - 2:23 pm
STL
-
ASE
7h 23m
2 stops
United Airlines Logo
3:20 pm - 8:46 pm
ASE
-
STL
4h 26m
1 stop
$368United Airlines
Sat, Jun 20 - Wed, Jun 24
United Airlines Logo
8:00 am - 2:44 pm
STL
-
ASE
7h 44m
2 stops
United Airlines Logo
11:32 am - 4:33 pm
ASE
-
STL
4h 01m
1 stop
$399United Airlines
Sat, Nov 14 - Wed, Nov 18
United Airlines Logo
9:13 am - 12:26 pm
STL
-
ASE
4h 13m
1 stop
United Airlines Logo
1:00 pm - 8:59 pm
ASE
-
STL
6h 59m
1 stop
$409United Airlines
Sat, Nov 14 - Wed, Nov 18
United Airlines Logo
8:25 am - 4:31 pm
STL
-
ASE
9h 06m
2 stops
United Airlines Logo
7:00 am - 12:43 pm
ASE
-
STL
4h 43m
1 stop
$414United Airlines
Tue, Aug 25 - Sat, Aug 29
United Airlines Logo
7:25 am - 5:18 pm
STL
-
ASE
10h 53m
2 stops
United Airlines Logo
1:15 pm - 10:00 pm
ASE
-
STL
7h 45m
2 stops
$419United Airlines
Tue, Aug 18 - Fri, Aug 21
United Airlines Logo
8:00 am - 3:08 pm
STL
-
ASE
8h 08m
2 stops
United Airlines Logo
1:15 pm - 10:00 pm
ASE
-
STL
7h 45m
2 stops
$437United Airlines
Mon, Jun 15 - Wed, Jun 17
United Airlines Logo
5:29 pm - 10:00 pm
STL
-
ASE
5h 31m
1 stop
United Airlines Logo
2:22 pm - 9:10 pm
ASE
-
STL
5h 48m
1 stop
$455United 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 June.

What is the cheapest month to fly from St. Louis to Aspen?

To calculate monthly average prices, KAYAK takes all prices for each month over the last year for round-trip flights from St. Louis to Aspen, removes the top 0.1% to account for outliers, and then takes the median of all values for each month.

The cheapest month for flights from St. Louis to Aspen is April, where tickets cost $0 (return) on average. On the other hand, the most expensive months are February and November, where the average cost of round-trip tickets is $907 and $793 respectively.

Find deals

Good to know

Low seasonMay
Cheapest flight$239
Best time to beat the crowds with an average 34% drop in price.
Most popular time to fly and prices are also 12% 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 5 days, the lowest price for a flight from St. Louis to Aspen was $239 for a one-way ticket and $329 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?

    Star Alliance is the only airline alliance operating flights between St. Louis and Aspen.

  • 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 airline 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 9777 reviews
7.3Comfort
7.1Entertainment
6.6Food
7.7Boarding
8.1Crew
Airline reviews

I flew from Santa Fe to Denver to catch a flight to London and the transfer of my luggage on arrival at Denver to the London flight worked perfectly. The crew on the ground and on board for the London flight were so friendly and efficient.

10.0 ExcellentMarianne, Jun 2026
SAF - DEN
Read more United Airlines reviews

I flew from Santa Fe to Denver to catch a flight to London and the transfer of my luggage on arrival at Denver to the London flight worked perfectly. The crew on the ground and on board for the London flight were so friendly and efficient.

It was a short flight so I was expecting too much

Late- that’s what United does best. Missed my connection, rebooked to a flight 17 hours later and had to spend $500 on a hotel. What did I get? A $15 meal voucher. What can you get in an airport for $15. I hate United so much.

It was good overall except from Omaha to Denver when flight a was a repeatedly delayed apparently due to some issue at Denver. Communications could have been handled better. I had to board then deboard with luggage and board again

Booked through Kayak Business, had a seat in middle and towards back due to booking rate, not comfortable.

They told us yesterday APR21st that they were cleaning the plane and we got delayed. After that they said they didn't had any crew for the flight so they cancelled the flight till next day.

The flight crew on this leg of my trip was very friendly and pleasant. Every one of them was humorous, as well as helpful and accommodating. This group was BY FAR the best crew I’ve flown with. They deserve kudos.

The entertainment options on the seat back video boards were nice.

The boarding process was straightforward. One pertinent observation regarding all boarding procedures is that if an individual requires assistance or possesses a special status and is part of preboarding, it is advisable to limit the number of passengers who can preboard with them, rather than the entire, sometimes large, companion groups. The seats are uncomfortable, and the entertainment options are significantly inferior compared to other airlines. During the snack service, I requested an additional bag of snacks, but my request was denied. Initially, the flight attendant agreed to my request.becoming a strange accurate moment. The flight duration was four hours.

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.

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

Information on your arrival and departure airports

St. Louis (STL)
Aspen (ASE)