STL - ASE

$256 Find Cheap Flights from St. Louis to Aspen - Compare and Save

1 adult
1 adult, Economy, 0 bags

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Everything you should know

Cheapest round-trip
$519
Typical prices: $359-$616
American Airlines
Sat 2/3Thu 2/8
STL - ASE • 1 stop
When to travel
May
Cheapest • 28% price drop
January
Most popular
Good to know
+1
Good to know
+1
Top layover airports
Dallas/Fort Worth (DFW)
Cheapest • Avg $418 (round-trip)
Denver Intl (DEN)
Shortest trip • 4h 44m (one-way)
Insights
Insights
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Flight Deals

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

 
Discover the best prices for you by selecting your travel dates on KAYAK.

Recent round-trip flight deals from St. Louis to Aspen

Tue, Dec 15 - Sun, Dec 20
American Airlines Logo
5:00 am - 12:30 pmSTL  Lambert-St Louis-ASE Aspen Pitkin County
8h 30m1 stop Dallas/Fort Worth
American Airlines Logo
11:34 am - 7:36 pmASE  Aspen Pitkin County-STL Lambert-St Louis
7h 02m1 stop Dallas/Fort Worth
$468American Airlines
Tue, Dec 15 - Sun, Dec 20
United Airlines Logo
9:40 am - 4:32 pmSTL  Lambert-St Louis-ASE Aspen Pitkin County
7h 52m2 stops Chicago O'Hare Intl Denver Intl
United Airlines Logo
11:07 am - 5:00 pmASE  Aspen Pitkin County-STL Lambert-St Louis
4h 53m1 stop Denver Intl
$504United Airlines
Wed, Feb 3 - Mon, Feb 8
American Airlines Logo
8:47 am - 4:14 pmSTL  Lambert-St Louis-ASE Aspen Pitkin County
8h 27m1 stop Dallas/Fort Worth
American Airlines Logo
1:07 pm - 10:34 pmASE  Aspen Pitkin County-STL Lambert-St Louis
8h 27m1 stop Chicago O'Hare Intl
$519American Airlines
Sun, Nov 1 - Thu, Nov 5
United Airlines Logo
1:40 pm - 4:57 pmSTL  Lambert-St Louis-ASE Aspen Pitkin County
4h 17m1 stop Denver Intl
United Airlines Logo
1:30 pm - 8:59 pmASE  Aspen Pitkin County-STL Lambert-St Louis
6h 29m1 stop Denver Intl
$525United Airlines
Sun, Nov 1 - Thu, Nov 5
United Airlines Logo
8:30 am - 2:37 pmSTL  Lambert-St Louis-ASE Aspen Pitkin County
7h 07m2 stops Chicago O'Hare Intl Denver Intl
United Airlines Logo
1:30 pm - 8:59 pmASE  Aspen Pitkin County-STL Lambert-St Louis
6h 29m1 stop Denver Intl
$530United Airlines
Tue, Dec 15 - Sun, Dec 20
United Airlines Logo
10:50 am - 6:43 pmSTL  Lambert-St Louis-ASE Aspen Pitkin County
8h 53m2 stops Chicago O'Hare Intl Denver Intl
United Airlines Logo
1:00 pm - 9:22 pmASE  Aspen Pitkin County-STL Lambert-St Louis
7h 22m2 stops Denver Intl Chicago O'Hare Intl
$609United Airlines
Wed, Feb 3 - Mon, Feb 8
United Airlines Logo
5:02 am - 2:19 pmSTL  Lambert-St Louis-ASE Aspen Pitkin County
10h 17m2 stops Chicago O'Hare Intl Houston George Bush Intcntl
United Airlines Logo
3:00 pm - 8:38 pmASE  Aspen Pitkin County-STL Lambert-St Louis
4h 38m1 stop Denver Intl
$624United Airlines
Wed, Feb 3 - Mon, Feb 8
United Airlines Logo
10:45 am - 8:11 pmSTL  Lambert-St Louis-ASE Aspen Pitkin County
10h 26m2 stops Chicago O'Hare Intl Denver Intl
United Airlines Logo
3:00 pm - 8:38 pmASE  Aspen Pitkin County-STL Lambert-St Louis
4h 38m1 stop Denver Intl
$624United Airlines
Tue, Nov 10 - Wed, Nov 11
United Airlines Logo
8:50 am - 12:48 pmSTL  Lambert-St Louis-ASE Aspen Pitkin County
4h 58m1 stop Denver Intl
United Airlines Logo
8:45 am - 4:57 pmASE  Aspen Pitkin County-STL Lambert-St Louis
7h 12m1 stop Denver Intl
$625United Airlines
Booking Insights

Price, demand and travel trends for St. Louis to Aspen flights

Use KAYAK data on prices, travel dates, airlines and seasonal trends to compare options and book flights with more confidence.

How much is a round-trip flight from St. Louis to Aspen?

Round-trip flights from St. Louis to Aspen typically range from $359 to $616. The lowest price found in the past 5 days was $519, on American Airlines.

What's the cheapest day of the week to fly from St. Louis to Aspen?

Based on deals KAYAK users found in the last 12 months, Wednesday is the cheapest day of the week to fly from St. Louis to Aspen. It’s 22% cheaper than the average day, while Sunday is the most expensive, with prices 59% higher.

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Key details for St. Louis to Aspen flights

Low season

April

Cheapest flight

$519
Beat the crowds with an average 65% drop in travelers.
The most popular month to fly with an average 46% increase in travelers.
Round-trip flight from St. Louis to Aspen

When to book flights from St. Louis to Aspen

Are your dates flexible? Find out the best times to travel from St. Louis to Aspen based on our flight data from the last year. Discover the cheapest month and even day to fly.
Estimated round-trip price

Your St. Louis to Aspen flight questions, answered

Find helpful answers about this route, including flight times, airports, airlines and booking tips.

  • What cabin classes can I book on flights from St. Louis to Aspen?

    Two cabin classes are available on flights from St. Louis to Aspen:

    • Economy Class
    • First Class

  • How long is a flight from St. Louis to Aspen?

    There are currently no nonstop flights available from St. Louis to Aspen. Flights with 1 layover take between 4h 44m and 5h 43m in total, depending on the connection.

  • Do I need a passport to fly from St. Louis to Aspen?

    No, a passport is not required for this domestic route, but you will need a real ID-compliant driver's license, a state ID or another TSA-accepted form of identification.

  • How much should I expect to pay for a St. Louis to Aspen flight?

    Round-trip flights from St. Louis to Aspen range from $359 to $616, with an average of $459 over the past 12 months. Anything below $359 counts as a good deal.

  • Have flight prices from St. Louis to Aspen changed much recently?

    Yes. Based on fares seen in the past 5 days, round-trip prices on this route showed a wide range, from about $468 to $2,346. That means the highest observed fare was about 5x higher than the lowest one.

  • What car rental options are available at Aspen Pitkin County Airport (ASE)?

    Aspen Pitkin County Airport (ASE) hosts 5 major car rental companies, with daily rates starting from around $33 for economy cars. Top options include:

    • Hertz
    • Budget
    • Sixt
    • Payless
    • Alamo

  • Which airports can I use when flying from St. Louis to Aspen?

    Flights from St. Louis to Aspen usually depart from Lambert-St Louis (STL) and arrive at Aspen Pitkin County (ASE).

  • Which airports do connecting flights from St. Louis to Aspen pass through?

    One-stop flights from St. Louis to Aspen most commonly connect through:

    • Denver Intl (DEN) - 88% of one-stop connections
    • Chicago O'Hare Intl (ORD) - 10% of one-stop connections
    • Dallas/Fort Worth (DFW) - 3% of one-stop connections

  • Can I save money by using flexible dates for flights from St. Louis to Aspen?

    Yes. Flexible dates can save you up to 51% on flights from St. Louis to Aspen. Wednesday is the cheapest departure day at $359 round-trip on average, while Sunday is the most expensive at $732, a difference of $373.

    KAYAK's flexible dates feature shows options up to 3 days before and after your selected dates, making it easier to compare nearby fares.

  • How much time can I save by choosing a different layover airport from St. Louis to Aspen?

    Flying via Denver Intl (DEN) gives the shortest average 1-stop total travel time at 4h 44m, compared with 5h 40m via Dallas/Fort Worth (DFW) and 5h 43m via Chicago O'Hare Intl (ORD).

  • What is the time difference between St. Louis and Aspen?

    Aspen is 1 hour behind St. Louis (Mountain Time vs Central Time). Plan for the time shift when scheduling connections or first-day activities.

Your guide to booking St. Louis to Aspen flights

Get tips on when to book, when to fly and what to know before your trip.
  • If your dates are flexible, aim for a Wednesday departure and avoid flying on Sunday. On this route, Wednesday flights average $359, about $373 less than Sunday fares (51% savings) based on the last 12 months.
  • If you can choose when to travel, plan your St. Louis to Aspen trip for May. Fares historically average $328 round-trip in that month - typically $326 less than the most expensive month, which is July (based on the last 12 months).
  • If you're arriving late at night and need somewhere to stay, check out these hotels close to Aspen Pitkin County Airport.

    • The Inn at Aspen

More options for your flight from St. Louis to Aspen

Complete your trip to Aspen with a hotel stay or car rental

Car rentals in Aspen
Hotels in Aspen
Vacations in Aspen