STL - ASE

$199 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 3/8. 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
Travelers love KAYAK
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Everything you should know

Cheapest round-trip
$304
Typical prices: $566-$749
United Airlines
Sat 2/21Thu 2/26
STL - ASE • 2 stops
Cheapest one-way
$234
United Airlines
Sun 3/8
STL - ASE • 1 stop
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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, Feb 21 - Thu, Feb 26
United Airlines Logo
11:25 am - 8:42 pm
STL
-
ASE
10h 17m2 stops
United Airlines Logo
4:04 pm - 10:59 pm
ASE
-
STL
5h 55m1 stop
$304United Airlines
Sat, Feb 21 - Thu, Feb 26
United Airlines Logo
11:25 am - 8:42 pm
STL
-
ASE
10h 17m2 stops
United Airlines Logo
10:15 am - 10:59 pm
ASE
-
STL
11h 44m2 stops
$310United Airlines
Tue, Jan 20 - Sat, Jan 24
United Airlines Logo
4:15 pm - 9:59 pm
STL
-
ASE
6h 44m1 stop
United Airlines Logo
7:45 am - 4:03 pm
ASE
-
STL
7h 18m1 stop
$339United Airlines
Tue, Jan 20 - Sat, Jan 24
United Airlines Logo
9:57 am - 3:20 pm
STL
-
ASE
6h 23m1 stop
United Airlines Logo
7:00 am - 4:03 pm
ASE
-
STL
8h 03m2 stops
$344United Airlines
Tue, Jan 20 - Sat, Jan 24
United Airlines Logo
9:57 am - 6:39 pm
STL
-
ASE
9h 42m2 stops
United Airlines Logo
8:53 am - 7:27 pm
ASE
-
STL
9h 34m2 stops
$350United Airlines
Sat, Feb 21 - Thu, Feb 26
United Airlines Logo
4:30 pm - 9:34 pm
STL
-
ASE
6h 04m1 stop
United Airlines Logo
4:04 pm - 10:59 pm
ASE
-
STL
5h 55m1 stop
$354United Airlines
Wed, Jan 28 - Sun, Feb 1
United Airlines Logo
6:30 am - 11:55 am
STL
-
ASE
6h 25m1 stop
United Airlines Logo
8:53 am - 4:55 pm
ASE
-
STL
7h 02m1 stop
$364United Airlines
Tue, Jan 20 - Sat, Jan 24
United Airlines Logo
9:57 am - 3:20 pm
STL
-
ASE
6h 23m1 stop
United Airlines Logo
7:15 am - 3:39 pm
ASE
-
STL
7h 24m1 stop
$374United Airlines
Tue, Jan 20 - Sat, Jan 24
United Airlines Logo
11:20 am - 8:15 pm
STL
-
ASE
9h 55m2 stops
United Airlines Logo
1:29 pm - 10:00 pm
ASE
-
STL
7h 31m1 stop
$379United Airlines
Wed, Jan 21 - Sun, Jan 25
United Airlines Logo
2:45 pm - 6:39 pm
STL
-
ASE
4h 54m1 stop
United Airlines Logo
10:35 am - 4:55 pm
ASE
-
STL
5h 20m1 stop
$384United 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 February.

Good to know

Low seasonDecember
Cheapest flight$234
Best time to beat the crowds with an average 33% drop in price.
Most popular time to fly with an average 42% increase in price.
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 $234 for a one-way ticket and $304 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 $530 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 9142 reviews
7.1Entertainment
6.6Food
7.3Comfort
8.1Crew
7.7Boarding
Airline reviews

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

6.0 GoodAnonymous, Jan 2026
MKE - DEN
Read more United Airlines reviews

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.

Terrible. They wouldn't allow me on my flight on the 14th..

It was fine. My connection in Charlotte to go to WPB was too late and I had to spend the night in the Charlotte Airport in the mini suites.

The flight was on time and arrived early. The crew were friendly and helpful.

My carry on baggage was damaged. Entire trip, I had to carry the baggage. When complained to the boarding crew, they got mad at me and still asked me to valet check in the cabin baggage. Rude boarding crew!!!

Everything about the flight was lovely. My only suggestion would be to offer a few more options of tv series from Apple TV or HBO.

Nothing to write home about, average flight experience. Seats were spacious enough, crew friendly enough. Loved the AA entertainment/wifi service.

Kayak was among the missing. There was not the usual advice regarding next gate after arriving in Dallas. No communication after the reminder to check in before the Moline flight. What happened?

They should have allowed for extra time to de-ice the plane before boarding passengers. This delayed us about 10-15 mins after we boarded. Overall experience was fine. Crew was friendly and on top of everything. We didn’t have any issues during the flight.

Experience was good. We were delayed in leaving by 15 mins because the flight was waiting on a family that was late in getting to the gate. Food and drink options were as expected. I highly recommend checking in ahead of time using the airline’s app so that it’s quicker to get your luggage tags as soon as you arrive at the terminal. No more waiting in long lines!

Overall experience was great. Flights were almost on time in departing and we arrived at our destination as scheduled. No issues with amenities or flight crew. Everything went well as as expected. Will fly again with American Airlines in the future!

We never made it due to delays on both ends. Gate attendant said it was mechanical but the system said otherwise, so no compensation. That’s not right.

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

Information on your arrival and departure airports