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$239+ Cheap flights from Aspen to St. Louis (ASE - STL)

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 5/31. Fares are subject to change and may not be available on all flights or dates of travel.
ASE — STL
Apr 22 — Apr 291
Wed 4/22
Wed 4/29
1 adult, Economy
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Cheap flight deals from Aspen to St. Louis

Cheapest flights from Aspen to St. Louis
Explore the most affordable flight options available from Aspen to St. Louis. Find the lowest fares from popular airlines and budget airlines, with prices last updated on March 23, 2026.

This United Airlines deal was found by Cheapflights users on 3/18. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 6/191:22 pm
ASE
-
STL
1 stop6h 21m
United Airlines
Sun 6/215:10 am
STL
-
ASE
1 stop4h 37m
United Airlines
Deal found 3/18$329
This United Airlines deal was found by Cheapflights users on 3/18. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 6/198:32 am
ASE
-
STL
2 stops11h 44m
United Airlines
Mon 6/225:10 am
STL
-
ASE
1 stop6h 41m
United Airlines
Deal found 3/18$538
This American Airlines deal was found by Cheapflights users on 3/18. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 6/157:36 am
ASE
-
STL
1 stop7h 57m
American Airlines
Thu 6/185:25 am
STL
-
ASE
1 stop5h 35m
American Airlines
Deal found 3/18$713

Find flight deals from Aspen to St. Louis

Discover tips and strategies to find the most affordable flight options for your journey from Aspen (ASE) to St. Louis (STL). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated March 23, 2026.

Round-trip from

$329
(United Airlines)

One-way from

$239
(United Airlines)
From Aspen Pitkin County to Lambert-St Louis
Search Deals
One-way flight from Aspen Pitkin County to Lambert-St Louis
Search Deals

Cheapflights Fare Finder

 
Customize your flight search to find flights from Aspen to St. Louis that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated March 23, 2026.
Use the filters below to find and compare flights from Aspen to St. Louis that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

AspenSt. Louis

ASE - STL

ASESTL

Aspen Pitkin County

Fri 6/19

1:22 pm-8:43 pm

1 stop6h 21m

Lambert-St Louis

Sun 6/21

5:10 am-8:47 am

1 stop4h 37m

$329
Quickest round-trip

AspenSt. Louis

ASE - STL

ASESTL

Aspen Pitkin County

Fri 6/19

3:25 pm-8:43 pm

1 stop4h 18m

Lambert-St Louis

Mon 6/22

5:10 am-8:46 am

1 stop4h 36m

$329
Cheapest one-way
Quickest one-way

AspenSt. Louis

ASE - STL

ASESTL

Aspen Pitkin County

Sun 5/31

2:22 pm-8:43 pm

1 stop5h 21m

$239

AspenSt. Louis

ASE - STL

ASESTL

Aspen Pitkin County

Sun 4/19

1:33 pm-11:36 pm

1 stop9h 03m

$270

AspenSt. Louis

ASE - STL

ASESTL

Aspen Pitkin County

Sun 4/19

1:07 pm-8:24 am

2 stops18h 17m

$372

Flights are sorted by cheapest round-trip flights first.

Deals found on 3/22

Sorted by cheapest first

Best time to book a flight from Aspen to St. Louis

Have a flexible travel schedule? Discover the best time to fly to St. Louis from Aspen with our price prediction graph.
Estimated round-trip price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Cheapflights Insights

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

What is the cheapest month to book a flight from Aspen to St. Louis?

Currently, September is the cheapest month in which you can book a flight from Aspen to St. Louis (average of $182). Flying from Aspen to St. Louis in June is currently the most expensive (average of $436). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

Reviews of airlines servicing St. Louis

Get insights into the airlines that provide service to St. Louis. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to St. Louis. Reviews last updated March 23, 2026.
Read reviews from past customers who have flown United Airlines from Aspen to St. Louis. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
United Airlines
7.4
Good
9,460 reviews

Comfort

7.3

Food

6.6

Entertainment

7.1

Boarding

7.7

Crew

8.1

Overall

7.4

Reviews

1 / 20
10.0
Excellent

Dane,Jan 2026

TYS - IAD

It was a short flight, so no time for amenities. Just glad everything was quick and easy from boarding to arriving at my destination with my family
United Airlines
7.4
Good
9,460 reviews
United Airlines
7.4
Good
9,460 reviews

Comfort

7.3

Food

6.6

Entertainment

7.1

Boarding

7.7

Crew

8.1

Overall

7.4

Reviews

1 / 20
10.0
Excellent

Dane,Jan 2026

TYS - IAD

It was a short flight, so no time for amenities. Just glad everything was quick and easy from boarding to arriving at my destination with my family

Related info for your journey

Find useful and relevant information for your journey from Aspen to St. Louis. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • How long is the flight from Aspen to St. Louis?

    There are many flights that can get you from Aspen to St. Louis in 4h 18m. Fly via United Airlines or American Airlines to get the fastest option. The distance from Aspen to St. Louis is about 885 mi. This flight may include one or multiple stops.

  • What is the cheapest airline to fly from Aspen to St. Louis round-trip?

    United Airlines, at $269, was found to be the cheapest airline from Aspen to St. Louis..

  • Can I find deals for flights from Aspen to St. Louis that include hotel bookings?

    Yes. In addition to deals on Aspen to St. Louis flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Aspen to St. Louis?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Aspen to St. Louis.

  • Can I find deals for business class flights from Aspen to St. Louis?

    Yes. Cheapflights offers flight deals from Aspen to St. Louis by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

  • What is the cheapest month to book a flight from Aspen to St. Louis?

    Currently, September is the cheapest month in which you can book a flight from Aspen to St. Louis (average of $182). Flying from Aspen to St. Louis in June is currently the most expensive (average of $436). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

Traveling to a place near St. Louis?

Book flights to St. Louis if you plan to visit one of these locations
Edwardsville
O'Fallon
Fenton
Swansea
Fairview Heights
Maryland Heights
Collinsville
Eureka
Wentzville
Glencoe
Chesterfield
Alton
Farmington
Festus

Browse thousands of different options on Cheapflights for your next trip

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Top airline flying from Aspen to St. Louis

Discover the top airline that operate flights from Aspen to St. Louis. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated March 23, 2026.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest$269Average$338FlexibilityNo cancel feeOn-time69%

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