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Cheap flights from St. Louis to Aspen from $209

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from St. Louis to Aspen departing on 3/12. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
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0 bags

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Find the cheapest flights from St. Louis to Aspen

Cheap round-trip flights

Enter your travel dates to find the best prices.
American Airlines Logo
9:35 am - 4:06 pm
STL
-
ASE
7h 31m
1 stop
American Airlines Logo
12:39 pm - 7:29 pm
ASE
-
STL
5h 50m
1 stop
$269American Airlines
Wed, Mar 4 - Wed, Mar 11
United Airlines Logo
5:15 am - 8:43 am
STL
-
ASE
4h 28m
1 stop
United Airlines Logo
6:25 pm - 11:58 pm
ASE
-
STL
4h 33m
1 stop
$290United Airlines
Wed, Jul 22 - Mon, Jul 27
United Airlines Logo
4:50 pm - 9:26 pm
STL
-
ASE
5h 36m
1 stop
United Airlines Logo
11:31 am - 4:34 pm
ASE
-
STL
4h 03m
1 stop
$317United Airlines
Fri, Jun 12 - Tue, Jun 16
United Airlines Logo
11:25 am - 6:40 pm
STL
-
ASE
8h 15m
2 stops
United Airlines Logo
6:28 pm - 11:34 pm
ASE
-
STL
4h 06m
1 stop
$343United Airlines
Mon, Mar 9 - Mon, Mar 16
United Airlines Logo
9:55 am - 8:42 pm
STL
-
ASE
11h 47m
2 stops
United Airlines Logo
10:12 am - 4:49 pm
ASE
-
STL
5h 37m
1 stop
$344United Airlines
Wed, Mar 4 - Wed, Mar 11
United Airlines Logo
9:55 am - 8:42 pm
STL
-
ASE
11h 47m
2 stops
United Airlines Logo
2:27 pm - 10:59 pm
ASE
-
STL
7h 32m
2 stops
$349United Airlines
Wed, Mar 4 - Wed, Mar 11
United Airlines Logo
5:15 am - 10:36 am
STL
-
ASE
6h 21m
1 stop
United Airlines Logo
5:25 pm - 11:58 pm
ASE
-
STL
5h 33m
1 stop
$370United Airlines
Thu, Jul 23 - Tue, Jul 28
United Airlines Logo
9:23 am - 5:26 pm
STL
-
ASE
9h 03m
2 stops
United Airlines Logo
6:25 pm - 11:58 pm
ASE
-
STL
4h 33m
1 stop
$458United Airlines
Fri, Jun 12 - Tue, Jun 16
United Airlines Logo
9:55 am - 3:20 pm
STL
-
ASE
6h 25m
1 stop
United Airlines Logo
3:29 pm - 8:26 pm
ASE
-
STL
3h 57m
1 stop
$481United Airlines
Mon, Feb 23 - Fri, Feb 27
United Airlines Logo
4:30 pm - 8:19 pm
STL
-
ASE
4h 49m
1 stop
United Airlines Logo
1:34 pm - 10:14 pm
ASE
-
STL
7h 40m
2 stops
$486United Airlines
Mon, Feb 23 - Fri, Feb 27

United Airlines flights from St. Louis to Aspen

Our best United Airlines deals on St. Louis to Aspen flight tickets
United Airlines
Jul 22
STL5:15 amLambert-St Louis
4h 28m
1 stop
ASE8:43 amAspen Pitkin County
Jul 27
ASE6:25 pmAspen Pitkin County
4h 33m
1 stop
STL11:58 pmLambert-St Louis
$290
United Airlines
Jun 12
STL4:50 pmLambert-St Louis
5h 36m
1 stop
ASE9:26 pmAspen Pitkin County
Jun 16
ASE11:31 amAspen Pitkin County
4h 03m
1 stop
STL4:34 pmLambert-St Louis
$317
United Airlines
Mar 9
STL11:25 amLambert-St Louis
8h 15m
2 stops
ASE6:40 pmAspen Pitkin County
Mar 16
ASE6:28 pmAspen Pitkin County
4h 06m
1 stop
STL11:34 pmLambert-St Louis
$343

American Airlines flights from St. Louis to Aspen

Our best American Airlines deals on St. Louis to Aspen flight tickets
American Airlines
Mar 4
STL9:35 amLambert-St Louis
7h 31m
1 stop
ASE4:06 pmAspen Pitkin County
Mar 11
ASE12:39 pmAspen Pitkin County
5h 50m
1 stop
STL7:29 pmLambert-St Louis
$269
American Airlines
Aug 7
STL5:15 amLambert-St Louis
5h 33m
1 stop
ASE9:48 amAspen Pitkin County
Aug 10
ASE4:37 pmAspen Pitkin County
5h 26m
1 stop
STL11:03 pmLambert-St Louis
$710
American Airlines
Aug 7
STL5:15 amLambert-St Louis
5h 33m
1 stop
ASE9:48 amAspen Pitkin County
Aug 10
ASE12:15 pmAspen Pitkin County
7h 04m
1 stop
STL8:19 pmLambert-St Louis
$721

momondo 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, momondo users made 832,500 searches. Data last updated February 10, 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

St. LouisAspen

STL - ASE

STLASE

Lambert-St Louis

Wed 3/4

9:35 am-4:06 pm

1 stop7h 31m

Aspen Pitkin County

Wed 3/11

12:39 pm-7:29 pm

1 stop5h 50m

$269

St. LouisAspen

STL - ASE

STLASE

Lambert-St Louis

Wed 7/22

5:15 am-8:43 am

1 stop4h 28m

Aspen Pitkin County

Mon 7/27

6:25 pm-11:58 pm

1 stop4h 33m

$290

St. LouisAspen

STL - ASE

STLASE

Lambert-St Louis

Fri 6/12

4:50 pm-9:26 pm

1 stop5h 36m

Aspen Pitkin County

Tue 6/16

11:31 am-4:34 pm

1 stop4h 03m

$317

St. LouisAspen

STL - ASE

STLASE

Lambert-St Louis

Mon 3/9

11:25 am-6:40 pm

2 stops8h 15m

Aspen Pitkin County

Mon 3/16

6:28 pm-11:34 pm

1 stop4h 06m

$343

St. LouisAspen

STL - ASE

STLASE

Lambert-St Louis

Wed 3/4

9:55 am-8:42 pm

2 stops11h 47m

Aspen Pitkin County

Wed 3/11

10:12 am-4:49 pm

1 stop5h 37m

$344

St. LouisAspen

STL - ASE

STLASE

Lambert-St Louis

Wed 3/4

9:55 am-8:42 pm

2 stops11h 47m

Aspen Pitkin County

Wed 3/11

2:27 pm-10:59 pm

2 stops7h 32m

$349

St. LouisAspen

STL - ASE

STLASE

Lambert-St Louis

Thu 7/23

5:15 am-10:36 am

1 stop6h 21m

Aspen Pitkin County

Tue 7/28

5:25 pm-11:58 pm

1 stop5h 33m

$370

St. LouisAspen

STL - ASE

STLASE

Lambert-St Louis

Fri 6/12

9:23 am-5:26 pm

2 stops9h 03m

Aspen Pitkin County

Tue 6/16

6:25 pm-11:58 pm

1 stop4h 33m

$458

St. LouisAspen

STL - ASE

STLASE

Lambert-St Louis

Mon 2/23

9:55 am-3:20 pm

1 stop6h 25m

Aspen Pitkin County

Fri 2/27

3:29 pm-8:26 pm

1 stop3h 57m

$481

St. LouisAspen

STL - ASE

STLASE

Lambert-St Louis

Mon 2/23

4:30 pm-8:19 pm

1 stop4h 49m

Aspen Pitkin County

Fri 2/27

1:34 pm-10:14 pm

2 stops7h 40m

$486

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 13 resultsSorted by cheapest first
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See travel insights to Aspen from

How to get the cheapest flight ticket from St. Louis to Aspen

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

What is the cheapest airline that flies from Lambert-St Louis to Aspen Pitkin County?

United Airlines and Alaska Airlines are the most popular carriers operating from Lambert-St Louis to Aspen Pitkin County

When to book flights from St. Louis to Aspen

Are you open to changing your travel dates? Check out the ideal times to fly from St. Louis to Aspen according to our flight data. Find out which month and days have the cheapest flights.
Estimated round-trip price

Cheap St. Louis to Aspen (STL to ASE) flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from St. Louis to Aspen

Fastest flight time

4h 28m

Direct flights

None
The fastest flight from St. Louis to Aspen takes 4h 28m
There are no direct flights from St. Louis to Aspen. There are no popular flight routes from St. Louis to Aspen.
Search flight deals

  • How far is Lambert-St Louis to Aspen Pitkin County by plane?

    A flight from Lambert-St Louis to Aspen Pitkin County will travel around 892.5 mi. Flights usually cover this in 4h 28m, depending on flying conditions and air traffic around both airports.

  • When did momondo last update prices for flights from Lambert-St Louis Airport to Aspen Pitkin County Airport?

    Prices for flights from Lambert-St Louis Airport to Aspen Pitkin County Airport refresh daily.

  • How many operators does momondo search for flights from Lambert-St Louis Airport to Aspen Pitkin County Airport?

  • How old do you have to be to fly from Lambert-St Louis Airport to Aspen Pitkin County Airport?

    The minimum age a child must be to fly alone is five but airlines that offer an unaccompanied minor (UNMR) service will have their own age restrictions, including rules around flight length, timings, and stopovers. We always recommend checking with the individual airline you are booking with to travel from Lambert-St Louis Airport to Aspen Pitkin County Airport.

  • What documentation or ID do you need to fly to Aspen Pitkin County Airport?

    The required travel and health documents for your Aspen Pitkin County Airport trip may vary depending on your itinerary and personal circumstances. As a general rule, you should carry multiple documents, including a national ID card or driver's license and a passport valid for six months after your intended arrival at Aspen Pitkin County Airport. We recommend that you seek guidance from your airline or a reliable third party such as IATA.

  • What is the most popular airline from St. Louis to Aspen?

Best airlines flying from St. Louis to Aspen

Compare and see reviews for airlines that fly from St. Louis to Aspen with momondo
Airline
Rating
Free Cancellation
Price
American AirlinesPriceFrom $236Free CancellationRating
7.2
11,259 reviews
Search American Airlines flights
United AirlinesPriceFrom $269Free CancellationRating
7.4
9,267 reviews
Search United Airlines flights

Traveling to a place near Aspen?

Book flights to Aspen if you plan to visit one of these locations
Leadville
Snowmass Village
Snowmass
Carbondale
Buena Vista

Why use momondo?

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momondo compares prices from hundreds of airlines and agents so you can find and book the best deal on flights from St. Louis to Aspen. Millions of users trust and use momondo every year so you are in good hands.

Can I find flights from St. Louis to Aspen with flexible booking policies on momondo?

Flights from St. Louis to Aspen with flexible booking policies can be found by using the search form above and then selecting our dedicated flexible booking filter, which will highlight only the flights where this policy is applied.

How can momondo help me find flights from St. Louis to Aspen?

Once all potential St. Louis to Aspen flight options are in front of you, momondo lets you sort and filter flights based on preferences such as airline, price and flight times amongst many other options.

I’m not ready to book a flight from St. Louis to Aspen right now. Can momondo alert me if prices change?

Of course. momondo tracks the price of St. Louis to Aspen flights. All you need is a valid email address and we will do the rest; it is that quick and easy.

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