$189 Cheap United flights St. Louis (STL) to Aspen (ASE)

View $189 flight on Sat, Aug 9, 2025Opens in a new window

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$189 Cheap United flights St. Louis (STL) to Aspen (ASE)

Prices were available within the past 7 days and start at $189 for one-way flights and $248 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

United
Fri, Aug 22 - Wed, Aug 27
STL
St. Louis
ASE
Aspen
$248 Roundtrip, found 4 days ago
$248
Roundtrip
found 4 days ago
Select United flight, departing Fri, Aug 22 from St. Louis to Aspen, returning Wed, Aug 27, priced at $248 found 4 days ago
United
Tue, Jul 15 - Tue, Jul 22
STL
St. Louis
ASE
Aspen
$279 Roundtrip, found 1 day ago
$279
Roundtrip
found 1 day ago
Select United flight, departing Tue, Jul 15 from St. Louis to Aspen, returning Tue, Jul 22, priced at $279 found 1 day ago
United
Tue, Sep 9 - Sat, Sep 13
STL
St. Louis
ASE
Aspen
$284 Roundtrip, found 6 days ago
$284
Roundtrip
found 6 days ago
Select United flight, departing Tue, Sep 9 from St. Louis to Aspen, returning Sat, Sep 13, priced at $284 found 6 days ago
United
Fri, Sep 19 - Tue, Sep 23
STL
St. Louis
ASE
Aspen
$287 Roundtrip, found 4 days ago
$287
Roundtrip
found 4 days ago
Select United flight, departing Fri, Sep 19 from St. Louis to Aspen, returning Tue, Sep 23, priced at $287 found 4 days ago
United
Fri, Aug 22 - Wed, Aug 27
STL
St. Louis
ASE
Aspen
$296 Roundtrip, found 4 days ago
$296
Roundtrip
found 4 days ago
Select United flight, departing Fri, Aug 22 from St. Louis to Aspen, returning Wed, Aug 27, priced at $296 found 4 days ago
United
Sat, Aug 9 - Tue, Aug 12
STL
St. Louis
ASE
Aspen
$300 Roundtrip, found 1 hour ago
$300
Roundtrip
found 1 hour ago
Select United flight, departing Sat, Aug 9 from St. Louis to Aspen, returning Tue, Aug 12, priced at $300 found 1 hour ago
Flights from St. Louis (STL) to Aspen (ASE)
Origin airport
Lambert-St. Louis Intl.
Destination airport
Pitkin County
Airlines serving
American Airlines, Delta, United
Popular airline
American Airlines
Distance
885 mi

Frequently asked questions

How much is a United Airlines flight from Lambert-St. Louis Intl. Airport (STL) to Pitkin County Airport (ASE)?
You'll find budget-friendly return United Airlines flights from $248 from STL to ASE by sorting your results from "Price (lowest to highest)" on Expedia. Or search for bargains from $189 for a one-way journey.**These prices were available on Expedia within the past 7 days, for flights departing within the next year. Prices and availability are subject to change. Additional terms apply.
What is the cheapest month to fly from STL to ASE with United Airlines?
United Airlines flights to Aspen are generally more affordable in the quieter months of May and April. Whether you're searching for a return or one-way ticket, you could land a better deal then.
What is the cheapest time to book flights from Lambert-St. Louis Intl. Airport (STL) to Pitkin County Airport (ASE) with United Airlines?
Begin your search one to three months ahead of your departure date to find cheap fares on United Airlines flights from Lambert-St. Louis Intl. Airport (STL) to Pitkin County Airport (ASE). You can save 25% by booking your domestic flight 34 to 86 days in advance compared to last-minute reservations made 6 to 12 days out. You could also reduce costs by buying your fare on a Sunday, as it's 6% cheaper on average than a Monday, the most expensive day to book.* Nail your timing, and you can enjoy significant savings on domestic trips.*Ideal booking window recommendation is based on average round-trip ticket prices for January through November for 2024. Best day of the week to book recommendation is based on average round-trip ticket prices for January through October 2024. All data sourced from ARC's global airline sales database.
Does United Airlines fly nonstop from Lambert-St. Louis Intl. Airport (STL) to Pitkin County Airport (ASE)?
Enter your dates, press search and use the "Nonstop" filter on Expedia to browse any direct flights from STL to ASE with United Airlines or another carrier.
What is the earliest United Airlines flight from STL to ASE?
Browse United Airlines's earliest flights from STL to ASE by checking our "Early Morning" and "Morning" filters. Not only will you get to your destination sooner, early departures also have a 20% less chance of being canceled.**Most reliable time of the day recommendation is based on January through August 2024 flight status data sourced from OAG's global flight data platform.
What airports does United Airlines fly into in Aspen?
Take a United Airlines flight from Lambert-St. Louis Intl. Airport (STL) to Aspen, and you're most likely to touch down at Pitkin County Airport (ASE). This is the airline's main hub here.
Why fly with United Airlines from STL to ASE?
A rewarding loyalty program and the ability to collect points through United Mileage Plus are the start of the reasons to depart from STL to ASE with United Airlines. Plus, when you join Expedia's free One Key™ program, you can earn OneKeyCash™* on top of United Airlines's loyalty program earnings. It's yours to spend on future bookings.*OneKeyCash™ disclaimer - OneKeyCash™ is not redeemable for cash and can only be used on Expedia, Hotels.com and Vrbo.
Can I change or cancel my United Airlines flight from Lambert-St. Louis Intl. Airport (STL) to Pitkin County Airport (ASE)?
Changes are usually free within 24 hours of booking, but your airline may charge you after that time. For further details about modifying your flights, check out your "Trips," select your flight and click on "Manage Booking." If you'd like the freedom to update your itinerary without being charged, check the "No cancel fee" or "Changes included" filter when planning your trip.

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