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Aspen

$199+ Cheap flights from St. Louis to Aspen (STL - ASE)

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 11/21. Fares are subject to change and may not be available on all flights or dates of travel.
STL — ASE
Oct 15 — Oct 221
Wed 10/15
Wed 10/22
1 adult, Economy
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Cheap 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 September 15, 2025.

Round-trip from

$249
(Delta)

One-way from

$199
(United Airlines)

Popular in

March

Cheapest in

November

Average price

$428
From Lambert-St Louis to Aspen Pitkin County
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One-way flight from Lambert-St Louis to Aspen Pitkin County
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Highest demand for flights based on searches. 17% potential increase in price ($115 potential increase over avg. RT price).
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Cheapest flight prices on average. 4% potential price decrease ($22 potential savings vs. average RT price).
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Average for round-trip flights in September 2025
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Find 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 September 15, 2025.

This Delta deal was found by Cheapflights users on 9/15. 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 10/306:00 amSTL - ASE
1 stop6h 10mDelta
Thu 11/67:21 amASE - STL
1 stop7h 49mDelta
Deal found 9/15$249
This American Airlines deal was found by Cheapflights users on 9/15. 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 10/306:00 amSTL - ASE
2 stops15h 34mAmerican Airlines
Thu 11/612:25 pmASE - STL
1 stop6h 05mAmerican Airlines
Deal found 9/15$338
This United Airlines deal was found by Cheapflights users on 9/14. 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.
Wed 11/261:35 pmSTL - ASE
1 stop22h 01mUnited Airlines
Sat 11/295:12 pmASE - STL
1 stop5h 32mUnited Airlines
Deal found 9/14$479
This American Airlines deal was found by Cheapflights users on 9/12. 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.
Sun 9/285:18 amSTL - ASE
1 stop5h 37mAmerican Airlines
Thu 10/212:11 pmASE - STL
1 stop6h 22mAmerican Airlines
Deal found 9/12$481
This United Airlines deal was found by Cheapflights users on 9/14. 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 10/179:00 amSTL - ASE
1 stop4h 59mUnited Airlines
Mon 10/2012:40 pmASE - STL
1 stop6h 02mUnited Airlines
Deal found 9/14$483
This United Airlines deal was found by Cheapflights users on 9/14. 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.
Wed 10/13:23 pmSTL - ASE
1 stop7h 32mUnited Airlines
Mon 10/66:15 pmASE - STL
1 stop4h 43mUnited Airlines
Deal found 9/14$540
This United Airlines deal was found by Cheapflights users on 9/14. 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.
Wed 11/264:43 pmSTL - ASE
1 stop18h 53mUnited Airlines
Sun 11/307:10 pmASE - STL
1 stop25h 44mUnited Airlines
Deal found 9/14$547
This United Airlines deal was found by Cheapflights users on 9/13. 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.
Wed 9/173:20 pmSTL - ASE
1 stop7h 25mUnited Airlines
Fri 9/196:15 pmASE - STL
1 stop17h 28mUnited Airlines
Deal found 9/13$632

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 September 15, 2025.
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 10/30

6:00 am-11:10 am

1 stop6h 10m

Aspen Pitkin County

Thu 11/6

7:21 am-4:10 pm

1 stop7h 49m

$249

St. LouisAspen

STL - ASE

STLASE

Lambert-St Louis

Thu 10/30

7:16 am-8:34 pm

2 stops14h 18m

Aspen Pitkin County

Thu 11/6

7:34 am-11:56 pm

2 stops15h 22m

$468

St. LouisAspen

STL - ASE

STLASE

Lambert-St Louis

Sun 9/28

5:18 am-9:55 am

1 stop5h 37m

Aspen Pitkin County

Thu 10/2

12:11 pm-7:33 pm

1 stop6h 22m

$481

St. LouisAspen

STL - ASE

STLASE

Lambert-St Louis

Fri 10/17

9:00 am-12:59 pm

1 stop4h 59m

Aspen Pitkin County

Mon 10/20

12:40 pm-7:42 pm

1 stop6h 02m

$483

St. LouisAspen

STL - ASE

STLASE

Lambert-St Louis

Wed 11/26

4:17 pm-10:36 am

2 stops19h 19m

Aspen Pitkin County

Sat 11/29

5:12 pm-11:44 pm

1 stop5h 32m

$521

St. LouisAspen

STL - ASE

STLASE

Lambert-St Louis

Wed 10/1

3:23 pm-9:55 pm

1 stop7h 32m

Aspen Pitkin County

Mon 10/6

6:15 pm-11:58 pm

1 stop4h 43m

$540

St. LouisAspen

STL - ASE

STLASE

Lambert-St Louis

Wed 11/26

4:43 pm-10:36 am

1 stop18h 53m

Aspen Pitkin County

Sun 11/30

7:10 pm-9:54 pm

1 stop25h 44m

$547

St. LouisAspen

STL - ASE

STLASE

Lambert-St Louis

Fri 11/21

1:35 pm-6:28 pm

1 stop5h 53m

$199

St. LouisAspen

STL - ASE

STLASE

Lambert-St Louis

Fri 11/21

5:17 am-11:42 am

1 stop7h 25m

$291

St. LouisAspen

STL - ASE

STLASE

Lambert-St Louis

Fri 11/21

6:00 am-11:21 am

1 stop6h 21m

$310

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/15

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, November is the cheapest month in which you can book a flight from St. Louis to Aspen (average of $448). Flying from St. Louis to Aspen in December is currently the most expensive (average of $662). 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 September 15, 2025.
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
8,929 reviews

Crew

8.1

Entertainment

7.1

Overall

7.4

Boarding

7.7

Comfort

7.3

Food

6.6

Reviews

1 / 20
2.0
Mediocre

Deb,Jan 2025

MKE - ORD

It was terrible! So much to say, but in a nutshell we used vouchers from United because our last trip with them was awful with many mishaps and errors made. Unfortunately, this trip was even worse!
United Airlines
7.4
Good
8,929 reviews
United Airlines
7.4
Good
8,929 reviews

Crew

8.1

Entertainment

7.1

Overall

7.4

Boarding

7.7

Comfort

7.3

Food

6.6

Reviews

1 / 20
2.0
Mediocre

Deb,Jan 2025

MKE - ORD

It was terrible! So much to say, but in a nutshell we used vouchers from United because our last trip with them was awful with many mishaps and errors made. Unfortunately, this trip was even worse!
American Airlines
7.2
Good
10,000 reviews
United Airlines
7.4
Good
8,929 reviews

Crew

8.1

Entertainment

7.1

Overall

7.4

Boarding

7.7

Comfort

7.3

Food

6.6

Reviews

1 / 20
2.0
Mediocre

Deb,Jan 2025

MKE - ORD

It was terrible! So much to say, but in a nutshell we used vouchers from United because our last trip with them was awful with many mishaps and errors made. Unfortunately, this trip was even worse!

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 4h 59m. 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 $288. Another option worth looking into is United Airlines, starting at $338 round trip. American Airlines is currently priced 48% below the average price you’ll pay for this route.

  • What are the cheapest airlines to fly from St. Louis to Aspen one-way?

    $199 is the cheapest one-way deal found within the past few days, from United Airlines. You may also be able to find cheap deals on American Airlines and Delta, with prices starting from $291 and $310, respectively.

  • 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, November is the cheapest month in which you can book a flight from St. Louis to Aspen (average of $448). Flying from St. Louis to Aspen in December is currently the most expensive (average of $662). 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
Carbondale
Buena Vista
Snowmass

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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 September 15, 2025.
AirlineCheapestAverageFlexibilityOn-time
American AirlinesCheapest$288Average$538FlexibilityNo cancel feeOn-time71%
United AirlinesCheapest$338Average$568FlexibilityNo cancel feeOn-time69%

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