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Cheap flights from Aspen to St. Louis from $336

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Aspen to St. Louis departing on 11/19. 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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Cheap round-trip flights

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United Airlines Logo
3:35 pm - 8:57 pmASE-STL
4h 22m1 stop
United Airlines Logo
4:37 pm - 8:18 pmSTL-ASE
4h 41m1 stop
$339United Airlines
Find Deal
Sat, Dec 6 - Tue, Dec 9
United Airlines Logo
9:52 am - 11:44 pmASE-STL
12h 52m2 stops
United Airlines Logo
6:30 am - 11:38 amSTL-ASE
6h 08m1 stop
$344United Airlines
Find Deal
Sat, Dec 6 - Tue, Dec 9
United Airlines Logo
11:39 am - 10:45 pmASE-STL
10h 06m2 stops
United Airlines Logo
10:00 am - 4:31 pmSTL-ASE
7h 31m2 stops
$349United Airlines
Find Deal
Sat, Dec 6 - Tue, Dec 9
United Airlines Logo
1:42 pm - 8:57 pmASE-STL
6h 15m1 stop
United Airlines Logo
4:37 pm - 9:18 pmSTL-ASE
5h 41m1 stop
$381United Airlines
Find Deal
Mon, Dec 8 - Mon, Dec 15
United Airlines Logo
11:39 am - 10:45 pmASE-STL
10h 06m2 stops
United Airlines Logo
10:00 am - 4:31 pmSTL-ASE
7h 31m2 stops
$414United Airlines
Find Deal
Sat, Dec 6 - Tue, Dec 9
United Airlines Logo
1:42 pm - 8:57 pmASE-STL
6h 15m1 stop
United Airlines Logo
1:35 pm - 12:38 pmSTL-ASE
24h 03m2 stops
$556United Airlines
Find Deal
Mon, Dec 8 - Mon, Dec 15
United Airlines Logo
7:10 am - 12:38 pmASE-STL
4h 28m1 stop
United Airlines Logo
1:35 pm - 9:01 amSTL-ASE
20h 26m1 stop
$562United Airlines
Find Deal
Thu, Nov 27 - Mon, Dec 1
United Airlines Logo
1:42 pm - 8:57 pmASE-STL
6h 15m1 stop
United Airlines Logo
3:19 pm - 12:38 pmSTL-ASE
22h 19m3 stops
$598United Airlines
Find Deal
Mon, Dec 8 - Mon, Dec 15
United Airlines Logo
7:10 am - 12:38 pmASE-STL
4h 28m1 stop
United Airlines Logo
8:20 am - 9:01 amSTL-ASE
25h 41m2 stops
$697United Airlines
Find Deal
Thu, Nov 27 - Mon, Dec 1
American Airlines Logo
7:34 am - 10:34 pmASE-STL
14h 00m2 stops
American Airlines Logo
8:39 am - 7:30 pmSTL-ASE
11h 51m2 stops
$1,060American Airlines
Find Deal
Thu, Nov 27 - Mon, Dec 1

United Airlines flights from Aspen to St. Louis

Our best United Airlines deals on Aspen to St. Louis flight tickets
United Airlines
Dec 6
ASE3:35 pmAspen Pitkin County
4h 22m
1 stop
STL8:57 pmLambert-St Louis
Dec 9
STL4:37 pmLambert-St Louis
4h 41m
1 stop
ASE8:18 pmAspen Pitkin County
$339
Find similar
United Airlines
Dec 6
ASE7:28 amAspen Pitkin County
4h 11m
1 stop
STL12:39 pmLambert-St Louis
Dec 9
STL10:00 amLambert-St Louis
7h 31m
2 stops
ASE4:31 pmAspen Pitkin County
$344
Find similar
United Airlines
Dec 6
ASE11:39 amAspen Pitkin County
10h 06m
2 stops
STL10:45 pmLambert-St Louis
Dec 9
STL10:00 amLambert-St Louis
7h 31m
2 stops
ASE4:31 pmAspen Pitkin County
$349
Find similar

momondo Fare Finder

 
Customize your flight search to find flights from Aspen to St. Louis 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 November 12, 2025.
Use the filters below to find and compare flights from Aspen to St. Louis that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

AspenSt. Louis

ASE - STL

ASESTL

Aspen Pitkin County

Sat 12/6

3:35 pm-8:57 pm

1 stop4h 22m

Lambert-St Louis

Tue 12/9

4:37 pm-8:18 pm

1 stop4h 41m

$339

AspenSt. Louis

ASE - STL

ASESTL

Aspen Pitkin County

Sat 12/6

9:52 am-11:44 pm

2 stops12h 52m

Lambert-St Louis

Tue 12/9

6:30 am-11:38 am

1 stop6h 08m

$344

AspenSt. Louis

ASE - STL

ASESTL

Aspen Pitkin County

Sat 12/6

11:39 am-10:45 pm

2 stops10h 06m

Lambert-St Louis

Tue 12/9

10:00 am-4:31 pm

2 stops7h 31m

$349

AspenSt. Louis

ASE - STL

ASESTL

Aspen Pitkin County

Mon 12/8

1:42 pm-8:57 pm

1 stop6h 15m

Lambert-St Louis

Mon 12/15

4:37 pm-9:18 pm

1 stop5h 41m

$381

AspenSt. Louis

ASE - STL

ASESTL

Aspen Pitkin County

Sat 12/6

11:39 am-10:45 pm

2 stops10h 06m

Lambert-St Louis

Tue 12/9

10:00 am-4:31 pm

2 stops7h 31m

$414

AspenSt. Louis

ASE - STL

ASESTL

Aspen Pitkin County

Mon 12/8

1:42 pm-8:57 pm

1 stop6h 15m

Lambert-St Louis

Mon 12/15

1:35 pm-12:38 pm

2 stops24h 03m

$556

AspenSt. Louis

ASE - STL

ASESTL

Aspen Pitkin County

Thu 11/27

7:10 am-12:38 pm

1 stop4h 28m

Lambert-St Louis

Mon 12/1

1:35 pm-9:01 am

1 stop20h 26m

$562

AspenSt. Louis

ASE - STL

ASESTL

Aspen Pitkin County

Mon 12/8

1:42 pm-8:57 pm

1 stop6h 15m

Lambert-St Louis

Mon 12/15

3:19 pm-12:38 pm

3 stops22h 19m

$598

AspenSt. Louis

ASE - STL

ASESTL

Aspen Pitkin County

Thu 11/27

7:10 am-12:38 pm

1 stop4h 28m

Lambert-St Louis

Mon 12/1

8:20 am-9:01 am

2 stops25h 41m

$697

AspenSt. Louis

ASE - STL

ASESTL

Aspen Pitkin County

Thu 11/27

7:34 am-10:34 pm

2 stops14h 00m

Lambert-St Louis

Mon 12/1

8:39 am-7:30 pm

2 stops11h 51m

$1,060

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 St. Louis from

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

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 day to depart on your flight to St. Louis?

The cheapest day to depart on your flight to St. Louis is on a Thursday when prices can be found for as low as $636. This is often the case because there is less demand to fly during this day of the week. If your travel schedule is flexible, try to avoid departing on a Friday because tickets tend to average around $686. These prices are subject to change though, so be sure to set up a Price Alert for flights to St. Louis.

When to book flights from Aspen to St. Louis

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

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

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

Direct flights

None
There are no direct flights from Aspen to St. Louis. There are no popular flight routes from Aspen to St. Louis.
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  • How far is Aspen Pitkin County to Lambert-St Louis by plane?

    Aspen Pitkin County and Lambert-St Louis are 892.5 mi apart from one another. Flights usually cover this in 4h 11m, depending on flying conditions and air traffic around both airports.

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

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

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

    The minimum age for a child to fly alone is five, but airlines offering an unaccompanied minor (UNMR) service may have their age restrictions, such as regulations concerning flight duration, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Aspen Pitkin County Airport to Lambert-St Louis Airport.

  • What documentation or ID do you need to fly to Lambert-St Louis Airport?

    The travel and health documents required for your trip to Lambert-St Louis Airport can vary based on your itinerary and personal situation. As a rule, consider having multiple documents such as a national ID card or driver’s license, and a passport valid for six-months after you plan to arrive at Lambert-St Louis Airport. We always recommend checking with your airline or a trusted third party such as IATA to get advice.

Traveling to a place near St. Louis?

Book flights to St. Louis if you plan to visit one of these locations
St. Charles
Chesterfield
Hermann
Fairview Heights
Florissant
Maryland Heights
O'Fallon
Wentzville
Fenton
Collinsville
St. Peters
Alton
Farmington
Festus
Glencoe
Edwardsville
Clayton
Eureka
Litchfield
Shrewsbury

Why use momondo?

Why should I use momondo to find a flight deal from Aspen to St. Louis?

To find the flight that best suits your needs, momondo gathers a range of flights from a large pool of different airlines and agents; you can then use our insights and filters to find and book the right flight to St. Louis from Aspen.

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

momondo does allow users to show only those flights to St. Louis from Aspen which offer a flexible booking policy as well as other useful filters and features.

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

Once you have performed a search for Aspen to St. Louis flights, momondo helps you find the right one by offering useful filters to narrow down your flight selection. Flights can be filtered by multiple factors such as airline, airport and price; but also by other criteria like aircraft type and payment method.

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

If you are simply researching potential flights to St. Louis, momondo offers a useful price alert feature which will track prices for flights to St. Louis from Aspen and alert you when they change.

An easier way to manage your St. Louis trip

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