HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
Aspen

$214+ 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 10/18. Fares are subject to change and may not be available on all flights or dates of travel.
STL — ASE
Aug 5 — Aug 121
Wed 8/5
Wed 8/12
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

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 July 6, 2026.

This American Airlines deal was found by Cheapflights users on 7/2. 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 9/241:49 pm
STL
-
ASE
1 stop8h 40m
American Airlines
Tue 9/297:00 am
ASE
-
STL
1 stop5h 16m
American Airlines
Deal found 7/2$408
This United Airlines deal was found by Cheapflights users on 7/5. 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 8/259:00 am
STL
-
ASE
1 stop7h 08m
United Airlines
Wed 8/269:15 am
ASE
-
STL
1 stop6h 19m
United Airlines
Deal found 7/5$427
This United Airlines deal was found by Cheapflights users on 7/4. 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.
Sun 7/124:48 pm
STL
-
ASE
1 stop4h 23m
United Airlines
Thu 7/165:10 pm
ASE
-
STL
1 stop5h 47m
United Airlines
Deal found 7/4$455
This United Airlines deal was found by Cheapflights users on 7/1. 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 7/226:00 am
STL
-
ASE
1 stop6h 01m
United Airlines
Sat 7/255:10 pm
ASE
-
STL
1 stop5h 37m
United Airlines
Deal found 7/1$469
This United Airlines deal was found by Cheapflights users on 7/1. 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.
Sun 7/265:10 am
STL
-
ASE
1 stop4h 37m
United Airlines
Fri 7/316:12 pm
ASE
-
STL
1 stop4h 45m
United Airlines
Deal found 7/1$486
This United Airlines deal was found by Cheapflights users on 7/2. 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 7/181:38 pm
STL
-
ASE
1 stop4h 48m
United Airlines
Sat 8/152:15 pm
ASE
-
STL
1 stop5h 31m
United Airlines
Deal found 7/2$487
This United Airlines deal was found by Cheapflights users on 7/1. 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 7/241:38 pm
STL
-
ASE
1 stop4h 48m
United Airlines
Fri 7/316:12 pm
ASE
-
STL
1 stop4h 45m
United Airlines
Deal found 7/1$488
This United Airlines deal was found by Cheapflights users on 7/1. 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 7/165:10 am
STL
-
ASE
1 stop6h 41m
United Airlines
Mon 7/202:22 pm
ASE
-
STL
1 stop5h 21m
United Airlines
Deal found 7/1$489
This United Airlines deal was found by Cheapflights users on 7/2. 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 9/245:10 am
STL
-
ASE
1 stop6h 26m
United Airlines
Tue 9/298:00 am
ASE
-
STL
2 stops9h 43m
United Airlines
Deal found 7/2$493
This United Airlines deal was found by Cheapflights users on 7/5. 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 10/168:00 am
STL
-
ASE
2 stops10h 18m
United Airlines
Tue 10/208:00 am
ASE
-
STL
2 stops9h 43m
United Airlines
Deal found 7/5$503

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 July 6, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$408
(American Airlines)

One-way from

$214
(United Airlines)

Popular in

February

Cheapest in

May

Average price

$654
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
One-way flight from Lambert-St Louis to Aspen Pitkin County
Search Deals
Highest demand for flights based on searches. 23% potential increase in price ($169 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 13% potential price decrease ($65 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in July 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 July 6, 2026.
Use the filters below to find and compare flights from St. Louis to Aspen that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip
Quickest round-trip

St. LouisAspen

STL - ASE

STLASE

Lambert-St Louis

Tue 8/25

9:00 am-3:08 pm

1 stop7h 08m

Aspen Pitkin County

Wed 8/26

9:15 am-4:34 pm

1 stop6h 19m

$427
Cheapest one-way

St. LouisAspen

STL - ASE

STLASE

Lambert-St Louis

Sun 10/18

6:15 am-12:02 pm

1 stop6h 47m

$214
Quickest one-way

St. LouisAspen

STL - ASE

STLASE

Lambert-St Louis

Sat 7/25

5:19 pm-9:56 pm

1 stop5h 37m

$306

St. LouisAspen

STL - ASE

STLASE

Lambert-St Louis

Sat 7/25

6:01 am-6:29 pm

2 stops13h 28m

$311

Flights are sorted by cheapest round-trip flights first.

Deals found on 7/5

Sorted by cheapest first

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 July.
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

How much does it cost to fly round-trip from St. Louis to Aspen?

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 July 6, 2026.
Read through reviews of airlines operating flights from St. Louis to Aspen, such as United Airlines. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
United Airlines
7.4
Good
9,938 reviews

Boarding

7.7

Overall

7.4

Entertainment

7.1

Food

6.6

Crew

8.1

Comfort

7.3

Reviews

1 / 20
10.0
Excellent

Julia,Sep 2025

BUF - DEN

The staff were amazing, from check in to boarding and on the flight. The range of entertainment options were really good as well.
United Airlines
7.4
Good
9,938 reviews
United Airlines
7.4
Good
9,938 reviews

Boarding

7.7

Overall

7.4

Entertainment

7.1

Food

6.6

Crew

8.1

Comfort

7.3

Reviews

1 / 20
10.0
Excellent

Julia,Sep 2025

BUF - DEN

The staff were amazing, from check in to boarding and on the flight. The range of entertainment options were really good as well.

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 7h 08m. There are 885 mi between St. Louis and Aspen.

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

    Flying on United Airlines is currently your cheapest option to Aspen, with prices starting at $269. United Airlines is currently priced 50% 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.

See more FAQs

Traveling to a place near Aspen?

Book flights to Aspen if you plan to visit one of these locations
Snowmass Village
Leadville
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.

Top airline flying from St. Louis to Aspen

Discover the top airline 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 July 6, 2026.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest$269Average$459FlexibilityNo 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.
Site
©2026 Cheapflights