$189 Cheap Flights from Aspen (ASE) to St. Louis (STL)

View $189 flight on Fri, Oct 17, 2025Opens in a new window

Popular airlines from Aspen/Pitkin County Airport (ASE) to St. Louis Lambert Intl. Airport (STL)

Cheap Flights from Aspen to St. Louis (ASE-STL)

Prices were available within the past 7 days and start at $189 for one-way flights and $237 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Delta
Tue, Oct 21 - Sat, Oct 25
ASE
Aspen
STL
St. Louis
$237 Roundtrip, found 1 day ago
$237
Roundtrip
found 1 day ago
Select Delta flight, departing Tue, Oct 21 from Aspen to St. Louis, returning Sat, Oct 25, priced at $237 found 1 day ago
American Airlines
Sat, Oct 18 - Sun, Oct 19
ASE
Aspen
STL
St. Louis
$269 Roundtrip, found 1 day ago
$269
Roundtrip
found 1 day ago
Select American Airlines flight, departing Sat, Oct 18 from Aspen to St. Louis, returning Sun, Oct 19, priced at $269 found 1 day ago
United
Sat, Oct 18 - Tue, Oct 21
ASE
Aspen
STL
St. Louis
$299 Roundtrip, found 1 day ago
$299
Roundtrip
found 1 day ago
Select United flight, departing Sat, Oct 18 from Aspen to St. Louis, returning Tue, Oct 21, priced at $299 found 1 day ago
American Airlines
Fri, Oct 17 - Sat, Oct 18
ASE
Aspen
STL
St. Louis
$303 Roundtrip, found 1 day ago
$303
Roundtrip
found 1 day ago
Select American Airlines flight, departing Fri, Oct 17 from Aspen to St. Louis, returning Sat, Oct 18, priced at $303 found 1 day ago
United
Tue, Oct 14 - Tue, Oct 21
ASE
Aspen
STL
St. Louis
$339 Roundtrip, found 1 day ago
$339
Roundtrip
found 1 day ago
Select United flight, departing Tue, Oct 14 from Aspen to St. Louis, returning Tue, Oct 21, priced at $339 found 1 day ago
United
Fri, Oct 17 - Sat, Oct 18
ASE
Aspen
STL
St. Louis
$342 Roundtrip, found 1 day ago
$342
Roundtrip
found 1 day ago
Select United flight, departing Fri, Oct 17 from Aspen to St. Louis, returning Sat, Oct 18, priced at $342 found 1 day ago
American Airlines
Fri, Oct 17 - Sun, Oct 19
ASE
Aspen
STL
St. Louis
$343 Roundtrip, found 8 hours ago
$343
Roundtrip
found 8 hours ago
Select American Airlines flight, departing Fri, Oct 17 from Aspen to St. Louis, returning Sun, Oct 19, priced at $343 found 8 hours ago
American Airlines
Fri, Oct 17 - Sat, Oct 18
ASE
Aspen
STL
St. Louis
$373 Roundtrip, found 1 day ago
$373
Roundtrip
found 1 day ago
Select American Airlines flight, departing Fri, Oct 17 from Aspen to St. Louis, returning Sat, Oct 18, priced at $373 found 1 day ago
American Airlines
Fri, Oct 17 - Sun, Oct 19
ASE
Aspen
STL
St. Louis
$377 Roundtrip, found 8 hours ago
$377
Roundtrip
found 8 hours ago
Select American Airlines flight, departing Fri, Oct 17 from Aspen to St. Louis, returning Sun, Oct 19, priced at $377 found 8 hours ago
American Airlines
Fri, Oct 17 - Sun, Oct 19
ASE
Aspen
STL
St. Louis
$380 Roundtrip, found 8 hours ago
$380
Roundtrip
found 8 hours ago
Select American Airlines flight, departing Fri, Oct 17 from Aspen to St. Louis, returning Sun, Oct 19, priced at $380 found 8 hours ago
Flights from Aspen (ASE) to St. Louis (STL)
Origin airport
Pitkin County
Destination airport
Lambert-St. Louis Intl.
Airlines serving
American Airlines, Delta, United
Roundtrip price
$236
Distance
885 mi

Aspen to St. Louis Flights

The cheapest times to fly from Aspen to St. Louis

On average, Thursday can be the cheapest time to fly, according to data from the Airlines Reporting Corporation (ARC), one of the world's biggest databases for global airline sales. The data reveals that you could save up to 16% by flying on a Thursday—the cheapest day to travel on average—instead of a Sunday—the most expensive. Some of the most affordable flights from Aspen to St. Louis are during the month of October. You can find some of the cheapest flights from Aspen to St. Louis with Expedia's search tool and vast selection of airlines.

 

The best time to book a flight from Aspen to St. Louis

Sunday is one of the best days to book for cheap flights from Aspen to St. Louis: Tickets reserved on a Sunday cost between 6% and 13% less than those reserved on a Friday, according to ARC data. The data also suggests booking early can also lead to cheaper airfares. You could save 24% by buying your tickets for domestic flights at least a month in advance and 10% by booking international flights 2 months in advance.

 

How to find cheap round-trip tickets from Aspen to St. Louis

Being flexible with your dates and using Expedia's Price Drop Protection and Price Tracking features are some of the best ways of finding a cheap ticket from Aspen to St. Louis in 2025. You can also book with separate airlines for your outbound and return journeys, from $189 one-way. Expedia also offers Price Drop Protection, so if the cost of your airfare goes down after booking, you'll receive a credit for the difference*. This is available for a small fee, and is free to One Key Gold and Platinum tier members.

 

Expedia's Price Tracking feature means you can stay on top of airfares without manually checking every day. It sends you automated price alerts for cheap Aspen to St. Louis flights and uses historical data to indicate when the best time to book is. Download Expedia's free app to activate this handy tool in a few easy taps.

 

You could also save big by booking one of Expedia's vacation packages. Bundling together your Aspen to St. Louis airfare with your accommodations and car rental is often cheaper than booking everything separately. There’s also One Key, Expedia's generous rewards program. Join for free and you could earn One Key cash on most bookings to save on future adventures.

 

*Terms apply.

 

Disclaimer: ARC The statistics are based on average round-trip ticket prices between January and August 2023. The percentages you see are averages.

 

Frequently asked questions

How much does a flight from Pitkin County Airport (ASE) to Lambert-St. Louis Intl. Airport (STL) cost?
Grab a cheap one-way flight from $189 or cheap return flight from $237 from Pitkin County Airport (ASE) to Lambert-St. Louis Intl. Airport (STL) with Expedia. Enter your travel dates and sort by "Price (lowest to highest)" to find our cheapest flight offers on this route.
What is the cheapest month to fly from Pitkin County Airport (ASE) to Lambert-St. Louis Intl. Airport (STL)?
October is the cheapest month to fly from ASE to STL. Planning your trip for the off-season is often the key to finding better deals on flights.
What is the cheapest airline that flies from Pitkin County Airport (ASE) to Lambert-St. Louis Intl. Airport (STL)?
Expedia's filter tool lets you easily compare travel time, airlines and fares all in one place. Select your preferences, then sort by "Price (lowest to highest)" to find out which carrier offers the cheapest ASE to STL flight.
How many flights per day from Pitkin County Airport (ASE) to Lambert-St. Louis Intl. Airport (STL)?
There aren't any daily direct flights from Pitkin County Airport (ASE) to Lambert-St. Louis Intl. Airport (STL). But you can choose flights with layovers. Filter your search results on Expedia to include one or more stops, and you'll be cruising above the clouds before you know it.
What day of the week has the most flights from ASE to STL?
Friday is usually the busiest day for flights, while Tuesday is often the quietest.* Keep in mind that flight schedules can vary depending on various factors, such as the time of year and airline.*Busiest/quietest day to travel is based on Expedia flight demand through January to December 2024.
What is the best time to fly from Pitkin County Airport (ASE) to Lambert-St. Louis Intl. Airport (STL)?
To land at Lambert-St. Louis Intl. Airport (STL) on time, choose a flight that takes off from Pitkin County Airport (ASE) before 3 PM. The chance of cancellations is 22% higher, on average, for departures after this time.**Most reliable time of the day and month to travel recommendation is based on January through August 2024 flight status data sourced from OAG's global flight data platform.
Is it cheaper to buy a plane ticket from Pitkin County Airport (ASE) to Lambert-St. Louis Intl. Airport (STL) last-minute?
Last-minute fares from ASE to STL are usually more expensive. To lock in the best prices, start looking for flights as early as possible. That being said, if you're flexible with your travel dates, it's possible to land a cheap ticket right before you leave.
Is it cheaper to book an ASE to STL flight and hotel package?
Securing an ASE to STL flight and hotel package tends to be cheaper than booking separately. With Expedia, you can enjoy the convenience of organizing your travels in one place. Select from our wide range of accommodations and then add car rentals, activities and flights to your booking. Bundle it all together, and you could save hundreds of dollars.
Can I cancel or change the date of my flight from Pitkin County Airport (ASE) to Lambert-St. Louis Intl. Airport (STL)?
Typically, it's possible to reschedule or cancel your ASE to STL flight. However, if the booking was made more than 24 hours ago, additional charges may apply. Check your airline's policies in your itinerary to see what changes are possible and whether any costs are involved. You'll also find more information on our Customer Service portal.

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*Available to One Key members.