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Aspen

$199+ Cheap flights from St. Louis to Aspen (STL - ASE)

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 11/21. Fares are subject to change and may not be available on all flights or dates of travel.
STL — ASE
Nov 15 — Nov 221
Sat 11/15
Sat 11/22
1 adult, Economy
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Find flight deals from St. Louis to Aspen

Cheapest flights from St. Louis to Aspen
Explore the most affordable flight options available from St. Louis to Aspen. Find the lowest fares from popular airlines and budget airlines, with prices last updated on October 16, 2025.

This American Airlines deal was found by Cheapflights users on 10/15. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 11/17:00 amSTL - ASE
1 stop5h 41mAmerican Airlines
Thu 11/67:34 amASE - STL
1 stop7h 53mAmerican Airlines
Deal found 10/15$259
This Delta deal was found by Cheapflights users on 10/15. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/306:00 amSTL - ASE
1 stop6h 10mDelta
Mon 11/37:21 amASE - STL
1 stop7h 49mDelta
Deal found 10/15$269
This United Airlines deal was found by Cheapflights users on 10/16. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/319:00 amSTL - ASE
1 stop6h 36mUnited Airlines
Tue 11/48:30 amASE - STL
1 stop6h 58mUnited Airlines
Deal found 10/16$339
This United Airlines deal was found by Cheapflights users on 10/15. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 11/18:25 amSTL - ASE
2 stops11h 03mUnited Airlines
Thu 11/67:10 amASE - STL
1 stop4h 29mUnited Airlines
Deal found 10/15$419
This United Airlines deal was found by Cheapflights users on 10/15. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/232:45 pmSTL - ASE
1 stop26h 34mUnited Airlines
Sun 12/285:00 pmASE - STL
1 stop4h 22mUnited Airlines
Deal found 10/15$522
This American Airlines deal was found by Cheapflights users on 10/15. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/305:11 amSTL - ASE
1 stop7h 32mAmerican Airlines
Mon 11/37:34 amASE - STL
2 stops15h 22mAmerican Airlines
Deal found 10/15$523

Cheap flight deals from St. Louis to Aspen

Discover tips and strategies to find the most affordable flight options for your journey from St. Louis (STL) to Aspen (ASE). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated October 16, 2025.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$230
(American Airlines)

One-way from

$199
(Delta)

Popular in

March

Cheapest in

September

Average price

$417
Provider with most accurate pricing for Lambert-St Louis-Aspen Pitkin County flight deals.
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Provider most trusted by Cheapflights users for Lambert-St Louis-Aspen Pitkin County flights.
Search Deals
From Lambert-St Louis to Aspen Pitkin County
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One-way flight from Lambert-St Louis to Aspen Pitkin County
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Highest demand for flights based on searches. 15% potential increase in price ($105 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease ($22 potential savings vs. average RT price).
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Average for round-trip flights in October 2025
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Cheapflights 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, Cheapflights users made 2,558,603 searches. Data last updated October 16, 2025.
Use the filters below to find and compare flights from St. Louis to Aspen that are best for you.

Fly from

St. Louis

Fly to

Aspen

Route

Depart

Return

Price

St. LouisAspen

STL - ASE

STLASE

Lambert-St Louis

Wed 1/14

11:55 am-7:04 pm

1 stop8h 09m

Aspen Pitkin County

Thu 1/22

4:54 pm-10:59 pm

1 stop5h 05m

$230

St. LouisAspen

STL - ASE

STLASE

Lambert-St Louis

Sat 11/1

7:00 am-11:41 am

1 stop5h 41m

Aspen Pitkin County

Thu 11/6

7:34 am-4:27 pm

1 stop7h 53m

$259

St. LouisAspen

STL - ASE

STLASE

Lambert-St Louis

Wed 1/14

9:57 am-4:52 pm

2 stops7h 55m

Aspen Pitkin County

Thu 1/22

4:01 pm-10:58 pm

1 stop5h 57m

$320

St. LouisAspen

STL - ASE

STLASE

Lambert-St Louis

Fri 10/31

9:00 am-2:36 pm

1 stop6h 36m

Aspen Pitkin County

Tue 11/4

8:30 am-4:28 pm

1 stop6h 58m

$339

St. LouisAspen

STL - ASE

STLASE

Lambert-St Louis

Fri 1/16

6:00 pm-9:59 pm

1 stop4h 59m

Aspen Pitkin County

Fri 1/23

12:36 pm-8:58 pm

1 stop7h 22m

$341

St. LouisAspen

STL - ASE

STLASE

Lambert-St Louis

Fri 1/9

11:55 am-4:24 pm

1 stop5h 29m

Aspen Pitkin County

Sun 1/11

7:30 am-2:47 pm

1 stop6h 17m

$384

St. LouisAspen

STL - ASE

STLASE

Lambert-St Louis

Sat 11/1

8:25 am-6:28 pm

2 stops11h 03m

Aspen Pitkin County

Thu 11/6

7:10 am-12:39 pm

1 stop4h 29m

$419

St. LouisAspen

STL - ASE

STLASE

Lambert-St Louis

Thu 1/15

2:45 pm-8:59 am

1 stop19h 14m

Aspen Pitkin County

Fri 1/23

3:25 pm-8:58 pm

1 stop4h 33m

$445

St. LouisAspen

STL - ASE

STLASE

Lambert-St Louis

Fri 11/21

6:00 am-11:21 am

1 stop6h 21m

$199

St. LouisAspen

STL - ASE

STLASE

Lambert-St Louis

Mon 10/27

6:00 am-11:10 am

1 stop6h 10m

$321

Flights are sorted by cheapest round-trip flights first.

Deals found on 10/15

Showing 1-10 of 15 results
1
2

Compare providers for flights from St. Louis to Aspen

Provider information is updated monthly. Please note that these providers often have deals for this flight, but the availability may vary on a day-by-day basis on Cheapflights.
Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from St. Louis to Aspen in October.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy2 starsTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*3 stars
eDreamsPrice Accuracy3 starsTrust Score*3 stars

*The Trust Score is based on feedback from users after their booking experience. It measures overall satisfaction, helping us identify issues like hidden fees, problems during the ticketing process, and the quality of customer service. This score is our best indicator of the provider's quality and reliability.

  • Most accurate provider: When it comes to deals on St. Louis-Aspen flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on St. Louis-Aspen flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from St. Louis-Aspen flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on St. Louis-Aspen flights, Cheapflights users trust FlightHub the most. FlightHub has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for St. Louis-Aspen flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.

Best time to book a flight from St. Louis to Aspen

Have a flexible travel schedule? Discover the best time to fly to Aspen from St. Louis with our price prediction graph.
Estimated round-trip price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Cheapflights Insights

Everything you need to know about your flight from St. Louis to Aspen

What is the cheapest month to book a flight from St. Louis to Aspen?

Currently, January is the cheapest month in which you can book a flight from St. Louis to Aspen (average of $228). Flying from St. Louis to Aspen in July is currently the most expensive (average of $347). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

How much does it cost to fly round-trip from St. Louis to Aspen?

Reviews of airlines servicing Aspen

Get insights into the airlines that provide service to Aspen. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Aspen. Reviews last updated October 16, 2025.
Read through reviews of airlines operating flights from St. Louis to Aspen, such as United Airlines and American Airlines. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
United Airlines
7.4
Good
8,982 reviews

Crew

8.1

Comfort

7.3

Entertainment

7.1

Food

6.6

Overall

7.4

Boarding

7.7

Reviews

1 / 20
4.0
Okay

Tim,Sep 2025

IAD - GSP

This was pretty bad. It’s chaos at the Dulles boarding gates for the small regional jets because they use one gate to board 3-4 flights at a time. So, it’s difficult knowing where and when to go. There is little space for any size of carrry-on, so most had to gate check their bags. However, the worst of it was that our single flight attendant fell asleep before we took off and the pilot couldn’t do so until she responded to his messages. My wife had to wake her up! So we were a little late leaving. Not to be thwarted, the flight attendant fell asleep right after take off and there was no sight of her during the flight. When the aircraft touched down, a tray of unsecured canned drinks came crashing onto the aisle up front. I can only assume someone didn’t do what they were supposed to. The pilot was great, but I’m sure he must not be happy with this crew member.
United Airlines
7.4
Good
8,982 reviews
United Airlines
7.4
Good
8,982 reviews

Crew

8.1

Comfort

7.3

Entertainment

7.1

Food

6.6

Overall

7.4

Boarding

7.7

Reviews

1 / 20
4.0
Okay

Tim,Sep 2025

IAD - GSP

This was pretty bad. It’s chaos at the Dulles boarding gates for the small regional jets because they use one gate to board 3-4 flights at a time. So, it’s difficult knowing where and when to go. There is little space for any size of carrry-on, so most had to gate check their bags. However, the worst of it was that our single flight attendant fell asleep before we took off and the pilot couldn’t do so until she responded to his messages. My wife had to wake her up! So we were a little late leaving. Not to be thwarted, the flight attendant fell asleep right after take off and there was no sight of her during the flight. When the aircraft touched down, a tray of unsecured canned drinks came crashing onto the aisle up front. I can only assume someone didn’t do what they were supposed to. The pilot was great, but I’m sure he must not be happy with this crew member.
American Airlines
7.2
Good
11,043 reviews
United Airlines
7.4
Good
8,982 reviews

Crew

8.1

Comfort

7.3

Entertainment

7.1

Food

6.6

Overall

7.4

Boarding

7.7

Reviews

1 / 20
4.0
Okay

Tim,Sep 2025

IAD - GSP

This was pretty bad. It’s chaos at the Dulles boarding gates for the small regional jets because they use one gate to board 3-4 flights at a time. So, it’s difficult knowing where and when to go. There is little space for any size of carrry-on, so most had to gate check their bags. However, the worst of it was that our single flight attendant fell asleep before we took off and the pilot couldn’t do so until she responded to his messages. My wife had to wake her up! So we were a little late leaving. Not to be thwarted, the flight attendant fell asleep right after take off and there was no sight of her during the flight. When the aircraft touched down, a tray of unsecured canned drinks came crashing onto the aisle up front. I can only assume someone didn’t do what they were supposed to. The pilot was great, but I’m sure he must not be happy with this crew member.

Related info for your journey

Find useful and relevant information for your journey from St. Louis to Aspen. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

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

    Departing from St. Louis to Aspen will take you 7h 55m. There are 885 mi between St. Louis and Aspen. This flight may include one or multiple stops.

  • What are the cheapest airlines flying from St. Louis to Aspen round-trip?

    Flying on American Airlines is currently your cheapest option to Aspen, with prices starting at $288. Another option worth looking into is United Airlines, starting at $338 round trip. American Airlines is currently priced 49% below the average price you’ll pay for this route.

  • Can I find deals for flights from St. Louis to Aspen that include hotel bookings?

    Yes. In addition to deals on St. Louis to Aspen flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from St. Louis to Aspen?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from St. Louis to Aspen.

  • Can I find deals for business class flights from St. Louis to Aspen?

    Yes. Cheapflights offers flight deals from St. Louis to Aspen by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

  • What is the cheapest month to book a flight from St. Louis to Aspen?

    Currently, January is the cheapest month in which you can book a flight from St. Louis to Aspen (average of $228). Flying from St. Louis to Aspen in July is currently the most expensive (average of $347). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

Traveling to a place near Aspen?

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

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Top 2 airlines flying from St. Louis to Aspen

Discover the top 2 airlines that operate flights from St. Louis to Aspen. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated October 16, 2025.
AirlineCheapestAverageFlexibilityOn-time
American AirlinesCheapest$288Average$508FlexibilityNo cancel feeOn-time71%
United AirlinesCheapest$338Average$546FlexibilityNo cancel feeOn-time69%

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