HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
Aspen

$189+ 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 9/19. Fares are subject to change and may not be available on all flights or dates of travel.
STL — ASE
Aug 24 — Aug 311
Sun 8/24
Sun 8/31
1 adult, Economy
We work with more than 300 partners to bring you better travel deals

Find cheap flights from St. Louis to Aspen with Cheapflights

1. Tell us where you want to go

Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”

2. Select your favorite providers

We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.

3. Compare prices and book

Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.

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 August 19, 2025.

Round-trip from

$229
(American Airlines)

One-way from

$189
(United Airlines)

Popular in

March

Cheapest in

November

Average price

$775
From Lambert-St Louis to Aspen Pitkin County
Search Deals
One-way flight from Lambert-St Louis to Aspen Pitkin County
Search Deals
Highest demand for flights based on searches. 7% potential increase in price ($44 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease ($21 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in August 2025
Search Deals

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 August 19, 2025.

This American Airlines deal was found by Cheapflights users on 8/18. 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 9/155:18 amSTL - ASE
1 stop5h 36mAmerican Airlines
Thu 9/2512:14 pmASE - STL
1 stop7h 11mAmerican Airlines
Deal found 8/18$303
This American Airlines deal was found by Cheapflights users on 8/17. 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 9/19:23 amSTL - ASE
1 stop5h 34mAmerican Airlines
Fri 9/512:16 pmASE - STL
1 stop6h 59mAmerican Airlines
Deal found 8/17$461
This United Airlines deal was found by Cheapflights users on 8/18. 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.
Mon 9/1511:30 amSTL - ASE
2 stops9h 39mUnited Airlines
Thu 9/2510:45 amASE - STL
2 stops10h 15mUnited Airlines
Deal found 8/18$480
This United Airlines deal was found by Cheapflights users on 8/18. 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 10/21:40 pmSTL - ASE
1 stop4h 14mUnited Airlines
Mon 10/62:00 pmASE - STL
1 stop5h 46mUnited Airlines
Deal found 8/18$654
This United Airlines deal was found by Cheapflights users on 8/17. 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.
Mon 9/111:30 amSTL - ASE
2 stops7h 49mUnited Airlines
Fri 9/53:25 pmASE - STL
1 stop4h 21mUnited Airlines
Deal found 8/17$736
This American Airlines deal was found by Cheapflights users on 8/19. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 8/209:23 amSTL - ASE
1 stop5h 34mAmerican Airlines
Sun 8/244:37 pmASE - STL
1 stop5h 26mAmerican Airlines
Deal found 8/19$824
This United Airlines deal was found by Cheapflights users on 8/19. 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.
Wed 8/2012:35 pmSTL - ASE
2 stops8h 34mUnited Airlines
Sun 8/246:15 pmASE - STL
1 stop4h 38mUnited Airlines
Deal found 8/19$830

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 August 19, 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

Tue 1/20

5:14 am-10:04 am

1 stop5h 50m

Aspen Pitkin County

Tue 1/27

8:08 am-4:14 pm

1 stop7h 06m

$229

St. LouisAspen

STL - ASE

STLASE

Lambert-St Louis

Fri 1/9

6:15 am-11:55 am

1 stop6h 40m

Aspen Pitkin County

Sun 1/11

1:00 pm-9:04 pm

1 stop7h 04m

$299

St. LouisAspen

STL - ASE

STLASE

Lambert-St Louis

Wed 2/4

5:14 am-10:04 am

1 stop5h 50m

Aspen Pitkin County

Mon 2/9

3:53 pm-9:49 pm

1 stop4h 56m

$303

St. LouisAspen

STL - ASE

STLASE

Lambert-St Louis

Mon 9/15

5:18 am-9:54 am

1 stop5h 36m

Aspen Pitkin County

Thu 9/25

12:14 pm-8:25 pm

1 stop7h 11m

$303

St. LouisAspen

STL - ASE

STLASE

Lambert-St Louis

Wed 1/14

5:14 am-10:04 am

1 stop5h 50m

Aspen Pitkin County

Sun 1/18

8:08 am-4:14 pm

1 stop7h 06m

$364

St. LouisAspen

STL - ASE

STLASE

Lambert-St Louis

Fri 1/9

5:14 am-10:04 am

1 stop5h 50m

Aspen Pitkin County

Sun 1/11

1:00 pm-9:49 pm

1 stop7h 49m

$364

St. LouisAspen

STL - ASE

STLASE

Lambert-St Louis

Tue 1/20

11:45 am-8:30 pm

2 stops9h 45m

Aspen Pitkin County

Tue 1/27

10:00 am-9:04 pm

2 stops10h 04m

$409

St. LouisAspen

STL - ASE

STLASE

Lambert-St Louis

Mon 9/1

9:23 am-1:57 pm

1 stop5h 34m

Aspen Pitkin County

Fri 9/5

12:16 pm-8:15 pm

1 stop6h 59m

$461

St. LouisAspen

STL - ASE

STLASE

Lambert-St Louis

Fri 9/19

5:15 am-9:27 am

1 stop5h 12m

$189

St. LouisAspen

STL - ASE

STLASE

Lambert-St Louis

Fri 9/19

6:00 pm-9:54 am

2 stops16h 54m

$395

Flights are sorted by cheapest round-trip flights first.

Deals found on 8/17

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 $665). 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 August 19, 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
8,922 reviews

Entertainment

7.1

Boarding

7.7

Comfort

7.3

Overall

7.4

Crew

8.1

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
8,922 reviews
United Airlines
7.4
Good
8,922 reviews

Entertainment

7.1

Boarding

7.7

Comfort

7.3

Overall

7.4

Crew

8.1

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
8,922 reviews

Entertainment

7.1

Boarding

7.7

Comfort

7.3

Overall

7.4

Crew

8.1

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 5h 50m. 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 $388 round trip. American Airlines is currently priced 49% 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, 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 $665). 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

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Alternative routes for St. Louis to Aspen

See prices for flight routes from nearby airports that may be better suited for you.
Kansas City to Denver flights
St. Louis to Denver flights
Springfield to Denver flights
Kansas City to Colorado Springs flights
Joplin to Denver flights
St. Louis to Colorado Springs flights
Kansas City to Grand Junction flights
Columbia to Denver flights
Kansas City to Aspen flights
St. Louis to Grand Junction flights
St. Louis to Vail flights
St. Louis to Montrose flights
Springfield to Colorado Springs flights
St. Louis to Durango flights
St. Louis to Hayden flights
Kansas City to Durango flights
Kansas City to Hayden flights
Columbia to Colorado Springs flights
St. Louis to Gunnison flights
Columbia to Aspen flights
Cape Girardeau to Denver flights
Branson to Denver flights
Kansas City to Alamosa flights
Joplin to Colorado Springs flights
Springfield to Hayden flights
St. Louis to Cortez flights
Kansas City to Cortez flights

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 August 19, 2025.
AirlineCheapestAverageFlexibilityOn-time
American AirlinesCheapest$288Average$508FlexibilityNo cancel feeOn-time71%
United AirlinesCheapest$388Average$726FlexibilityNo cancel feeOn-time69%

100% Free

Cheapflights is completely free to use, so you can start saving the moment you arrive.

Book with Flexibility

Our users can plan ahead with confidence and find flights with no change fees

Travel Smart

Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.