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Aspen

$269+ Cheap flights from St. Louis to Aspen (STL - ASE)

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 5/29. Fares are subject to change and may not be available on all flights or dates of travel.
STL — ASE
Mar 23 — Mar 301
Mon 3/23
Mon 3/30
1 adult, Economy
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Cheap flight deals from St. Louis to Aspen

Cheapest flights from St. Louis to Aspen
Explore the most affordable flight options available from St. Louis to Aspen. Find the lowest fares from popular airlines and budget airlines, with prices last updated on February 21, 2026.

This United Airlines deal was found by Cheapflights users on 2/19. 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 5/294:48 pm
STL
-
ASE
1 stop5h 38m
United Airlines
Sun 5/316:12 pm
ASE
-
STL
1 stop4h 45m
United Airlines
Deal found 2/19$269
This United Airlines deal was found by Cheapflights users on 2/18. 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.
Thu 3/57:41 am
STL
-
ASE
1 stop8h 39m
United Airlines
Mon 3/96:28 pm
ASE
-
STL
1 stop4h 06m
United Airlines
Deal found 2/18$314
This United Airlines deal was found by Cheapflights users on 2/21. 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 6/124:48 pm
STL
-
ASE
1 stop5h 38m
United Airlines
Tue 6/163:25 pm
ASE
-
STL
1 stop4h 18m
United Airlines
Deal found 2/21$329
This United Airlines deal was found by Cheapflights users on 2/19. 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 11/34:30 pm
STL
-
ASE
1 stop4h 36m
United Airlines
Sat 11/78:30 am
ASE
-
STL
1 stop6h 56m
United Airlines
Deal found 2/19$339
This United Airlines deal was found by Cheapflights users on 2/21. 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 6/279:23 am
STL
-
ASE
2 stops9h 03m
United Airlines
Thu 7/26:12 pm
ASE
-
STL
1 stop4h 45m
United Airlines
Deal found 2/21$384
This American Airlines deal was found by Cheapflights users on 2/20. 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.
Tue 2/244:13 pm
STL
-
ASE
1 stop5h 41m
American Airlines
Thu 2/2611:51 am
ASE
-
STL
1 stop8h 21m
American Airlines
Deal found 2/20$395
This United Airlines deal was found by Cheapflights users on 2/19. 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 3/56:25 am
STL
-
ASE
1 stop6h 16m
United Airlines
Sun 3/86:28 pm
ASE
-
STL
1 stop4h 06m
United Airlines
Deal found 2/19$433

Find flight deals from St. Louis to Aspen

Discover tips and strategies to find the most affordable flight options for your journey from St. Louis (STL) to Aspen (ASE). 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 February 21, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$269
(United Airlines)

Popular in

November

Cheapest in

June

Average price

$749
Provider with most accurate pricing for Lambert-St Louis-Aspen Pitkin County flight deals.
Search Deals
Provider most trusted by Cheapflights users for Lambert-St Louis-Aspen Pitkin County flights.
Search Deals
From Lambert-St Louis to Aspen Pitkin County
Search Deals
High demand for flights, 5% potential price rise
Search Deals
Cheapest flight prices on average. 4% potential price decrease ($25 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in February 2026
Search Deals

Cheapflights Fare Finder

 
Customize your flight search to find flights from St. Louis to Aspen 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 February 21, 2026.
Use the filters below to find and compare flights from St. Louis to Aspen that are best for you.

Fly from

St. Louis

Fly to

Aspen

Route

Depart

Return

Price

St. LouisAspen

STL - ASE

STLASE

Lambert-St Louis

Thu 3/5

7:41 am-3:20 pm

1 stop8h 39m

Aspen Pitkin County

Mon 3/9

6:28 pm-11:34 pm

1 stop4h 06m

$314

St. LouisAspen

STL - ASE

STLASE

Lambert-St Louis

Tue 2/24

4:13 pm-8:54 pm

1 stop5h 41m

Aspen Pitkin County

Thu 2/26

11:51 am-9:12 pm

1 stop8h 21m

$395

St. LouisAspen

STL - ASE

STLASE

Lambert-St Louis

Thu 3/5

6:25 am-11:41 am

1 stop6h 16m

Aspen Pitkin County

Sun 3/8

6:28 pm-11:34 pm

1 stop4h 06m

$433

St. LouisAspen

STL - ASE

STLASE

Lambert-St Louis

Wed 3/4

8:41 am-12:45 pm

1 stop5h 04m

Aspen Pitkin County

Sun 3/8

6:28 pm-11:34 pm

1 stop4h 06m

$495

St. LouisAspen

STL - ASE

STLASE

Lambert-St Louis

Fri 3/13

5:15 am-9:11 am

1 stop4h 56m

Aspen Pitkin County

Fri 3/20

6:28 pm-11:34 pm

1 stop4h 06m

$553

St. LouisAspen

STL - ASE

STLASE

Lambert-St Louis

Sun 3/1

6:25 am-11:41 am

1 stop6h 16m

Aspen Pitkin County

Wed 3/4

2:27 pm-8:26 pm

1 stop4h 59m

$566

St. LouisAspen

STL - ASE

STLASE

Lambert-St Louis

Mon 3/2

8:41 am-12:45 pm

1 stop5h 04m

Aspen Pitkin County

Wed 3/4

2:27 pm-8:26 pm

1 stop4h 59m

$566

St. LouisAspen

STL - ASE

STLASE

Lambert-St Louis

Mon 3/2

4:30 pm-8:19 pm

1 stop4h 49m

Aspen Pitkin County

Thu 3/5

2:27 pm-8:41 pm

1 stop5h 14m

$566

St. LouisAspen

STL - ASE

STLASE

Lambert-St Louis

Wed 3/4

8:00 am-2:52 pm

1 stop7h 52m

Aspen Pitkin County

Sun 3/8

3:46 pm-11:44 pm

1 stop6h 58m

$569

Flights are sorted by cheapest round-trip flights first.

Deals found on 2/18

Compare providers for flights from St. Louis to Aspen

Provider information is updated monthly. Please note that these providers often have deals for this flight, but the availability may vary on a day-by-day basis on Cheapflights.
Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from St. Louis to Aspen in February.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy1 starTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*3 stars

*The Trust Score is based on feedback from users after their booking experience. It measures overall satisfaction, helping us identify issues like hidden fees, problems during the ticketing process, and the quality of customer service. This score is our best indicator of the provider's quality and reliability.

  • Most accurate provider: When it comes to deals on St. Louis-Aspen flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on St. Louis-Aspen flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from St. Louis-Aspen flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on St. Louis-Aspen flights, Cheapflights users trust FlightHub the most. FlightHub has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for St. Louis-Aspen flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.

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

Have a flexible travel schedule? Discover the best time to fly to Aspen from St. Louis 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 St. Louis to Aspen

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

Currently, February is the cheapest month in which you can book a flight from St. Louis to Aspen (average of $209). Flying from St. Louis to Aspen in July is currently the most expensive (average of $347). 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 Aspen

Get insights into the airlines that provide service to Aspen. 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 Aspen. Reviews last updated February 21, 2026.
Read through reviews of airlines operating flights from St. Louis to Aspen, such as United Airlines and American Airlines. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
United Airlines
7.4
Good
9,335 reviews

Comfort

7.3

Entertainment

7.1

Crew

8.1

Boarding

7.7

Overall

7.4

Food

6.6

Reviews

1 / 20
6.0
Good

Gerry,Jan 2026

YVR - DEN

Seats were uncomfortable. Second leg of my flight on United had much more comfortable seats
United Airlines
7.4
Good
9,335 reviews
United Airlines
7.4
Good
9,335 reviews

Comfort

7.3

Entertainment

7.1

Crew

8.1

Boarding

7.7

Overall

7.4

Food

6.6

Reviews

1 / 20
6.0
Good

Gerry,Jan 2026

YVR - DEN

Seats were uncomfortable. Second leg of my flight on United had much more comfortable seats
American Airlines
7.2
Good
11,334 reviews
United Airlines
7.4
Good
9,335 reviews

Comfort

7.3

Entertainment

7.1

Crew

8.1

Boarding

7.7

Overall

7.4

Food

6.6

Reviews

1 / 20
6.0
Good

Gerry,Jan 2026

YVR - DEN

Seats were uncomfortable. Second leg of my flight on United had much more comfortable seats

Related info for your journey

Find useful and relevant information for your journey from St. Louis to Aspen. 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 St. Louis to Aspen?

    Departing from St. Louis to Aspen will take you 5h 41m. There are 885 mi between St. Louis and Aspen. This flight may include one or multiple stops.

  • What are the cheapest airlines flying from St. Louis to Aspen round-trip?

    Flying on American Airlines is currently your cheapest option to Aspen, with prices starting at $236. Another option worth looking into is United Airlines, starting at $269 round trip. American Airlines is currently priced 56% below the average price you’ll pay for this route.

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

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

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

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

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

    Yes. Cheapflights offers flight deals from St. Louis to Aspen 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 St. Louis to Aspen?

    Currently, February is the cheapest month in which you can book a flight from St. Louis to Aspen (average of $209). Flying from St. Louis to Aspen in July is currently the most expensive (average of $347). 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 Aspen?

Book flights to Aspen if you plan to visit one of these locations
Snowmass Village
Buena Vista
Snowmass

Browse thousands of different options on Cheapflights for your next trip

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Top 2 airlines flying from St. Louis to Aspen

Discover the top 2 airlines that operate flights from St. Louis to Aspen. 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 February 21, 2026.
AirlineCheapestAverageFlexibilityOn-time
American AirlinesCheapest$236Average$392FlexibilityNo cancel feeOn-time71%
United AirlinesCheapest$269Average$474FlexibilityNo cancel feeOn-time69%

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