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St. Louis

$357+ Cheap flights from Aspen to St. Louis (ASE - STL)

This is the cheapest round-trip flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 9/3. Fares are subject to change and may not be available on all flights or dates of travel.
ASE — STL
Sep 7 — Sep 141
Mon 9/7
Mon 9/14
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 August 8, 2026.

This American Airlines deal was found by Cheapflights users on 8/4. 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.
Thu 9/310:31 am -
1 stop6h 34m
Tue 9/86:36 am -
1 stop8h 14m
Deal found 8/4$357
This United Airlines deal was found by Cheapflights users on 8/4. 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.
Thu 9/32:15 pm -
2 stops7h 44m
Tue 9/81:36 pm -
1 stop4h 42m
Deal found 8/4$362
This United Airlines deal was found by Cheapflights users on 8/7. 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.
Tue 10/63:20 pm -
1 stop4h 16m
Tue 10/2010:27 am -
2 stops7h 51m
Deal found 8/7$405
This Delta deal was found by Cheapflights users on 8/4. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/37:20 am -
1 stop6h 13m
Wed 9/96:00 am -
1 stop6h 21m
Deal found 8/4$428
This United Airlines deal was found by Cheapflights users on 8/4. 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 9/42:15 pm -
1 stop5h 31m
Tue 9/812:59 pm -
2 stops9h 30m
Deal found 8/4$442
This American Airlines deal was found by Cheapflights users on 8/4. 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.
Thu 8/277:30 am -
1 stop6h 15m
Mon 8/315:42 am -
1 stop7h 38m
Deal found 8/4$465
This United Airlines deal was found by Cheapflights users on 8/6. 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.
Thu 9/32:15 pm -
1 stop5h 31m
Mon 9/74:40 pm -
1 stop5h 49m
Deal found 8/6$491
This United Airlines deal was found by Cheapflights users on 8/6. 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.
Sat 8/222:15 pm -
1 stop5h 31m
Wed 8/266:00 am -
1 stop6h 06m
Deal found 8/6$509
This United Airlines deal was found by Cheapflights users on 8/3. 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.
Thu 8/273:20 pm -
1 stop4h 26m
Mon 8/314:40 pm -
1 stop4h 36m
Deal found 8/3$545

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 August 8, 2026.

Round-trip from

$357
(American Airlines)
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 August 8, 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 Aspen Pitkin County - STL Lambert-St Louis

ASESTL

Aspen Pitkin County

Thu 9/3

10:31 am-6:05 pm

1 stop6h 34m

Lambert-St Louis

Tue 9/8

6:36 am-1:50 pm

1 stop8h 14m

$357

AspenSt. Louis

ASE Aspen Pitkin County - STL Lambert-St Louis

ASESTL

Aspen Pitkin County

Thu 9/3

2:15 pm-10:59 pm

2 stops7h 44m

Lambert-St Louis

Tue 9/8

1:36 pm-5:18 pm

1 stop4h 42m

$362

AspenSt. Louis

ASE Aspen Pitkin County - STL Lambert-St Louis

ASESTL

Aspen Pitkin County

Thu 9/3

7:20 am-2:33 pm

1 stop6h 13m

Lambert-St Louis

Wed 9/9

6:00 am-11:21 am

1 stop6h 21m

$428

AspenSt. Louis

ASE Aspen Pitkin County - STL Lambert-St Louis

ASESTL

Aspen Pitkin County

Fri 9/11

2:15 pm-10:59 pm

2 stops7h 44m

Lambert-St Louis

Sun 9/13

5:30 pm-9:55 pm

1 stop5h 25m

$442

AspenSt. Louis

ASE Aspen Pitkin County - STL Lambert-St Louis

ASESTL

Aspen Pitkin County

Thu 8/27

7:30 am-2:45 pm

1 stop6h 15m

Lambert-St Louis

Mon 8/31

5:42 am-12:20 pm

1 stop7h 38m

$465
Quickest round-trip

AspenSt. Louis

ASE Aspen Pitkin County - STL Lambert-St Louis

ASESTL

Aspen Pitkin County

Thu 9/3

2:15 pm-8:46 pm

1 stop5h 31m

Lambert-St Louis

Mon 9/7

4:40 pm-9:29 pm

1 stop5h 49m

$491

Flights are sorted by cheapest round-trip flights first.

Deals found on 8/4

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.

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 August 8, 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
10,086 reviews

Comfort

7.3

Entertainment

7.1

Food

6.7

Boarding

7.7

Crew

8.1

Overall

7.4

Reviews

1 / 20
10.0
Excellent

Michelle,Dec 2025

DEN - MKE

I liked that the plane waited 5 minutes for a family whose incoming plane was late. This was the last flight of the day to MKE. Flight attendants actually checked in throughout the flight. Although, not really friendly. Happy to see screens on seat backs again. This is my first time not flying first class in over 10 years. It was economy plus.
United Airlines
7.4
Good
10,086 reviews
United Airlines
7.4
Good
10,086 reviews

Comfort

7.3

Entertainment

7.1

Food

6.7

Boarding

7.7

Crew

8.1

Overall

7.4

Reviews

1 / 20
10.0
Excellent

Michelle,Dec 2025

DEN - MKE

I liked that the plane waited 5 minutes for a family whose incoming plane was late. This was the last flight of the day to MKE. Flight attendants actually checked in throughout the flight. Although, not really friendly. Happy to see screens on seat backs again. This is my first time not flying first class in over 10 years. It was economy plus.

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 6h 13m. Fly via American Airlines, United Airlines, or Delta 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.

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
Fairview Heights
O'Fallon
Fenton
Swansea
Eureka
Maryland Heights
Collinsville
Wentzville
Glencoe
Chesterfield
Farmington

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 August 8, 2026.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest$269Average$328FlexibilityNo cancel feeOn-time69%

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