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

Departing from St. Louis to Aspen will take you 4h 31m. There are 885 mi between St. Louis and Aspen.

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 $236. Another option worth looking into is United Airlines, starting at $318 round trip. American Airlines is currently priced 57% below the average price you’ll pay for this route.

In terms of precipitation, rainfall in Aspen ranges from 1.0 - 1.8 inches per month. April is typically the wettest month, when rainfall can reach 1.8 in. January is typically the driest time to visit Aspen when rainfall is around 1.0 in.

If weather is an important factor for your trip to Aspen, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 64.4 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 19.4 F).

What is the cheapest time of day to fly from STL to ASE?

Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from St. Louis to Aspen as you normally would.

Most accurate provider : When it comes to deals on St. Louis-Aspen flights, users find the pricing of eDreams to be most consistent on Cheapflights vs. eDreams Users can find the same prices on St. Louis-Aspen flight deals on Cheapflights vs. eDreams >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 eDreams the most. eDreams 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.

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.

$229+ Flights from St. Louis to Aspen

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

Airfare is below average for this route at the moment. St. Louis to Aspen flights typically cost between $349 and $534 in June. The cheapest round-trip price found within the last 3 days was $229 on United Airlines (Jun 2-Jun 10).

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Cheap 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 December 18, 2025.

Tue 12/235:16 amSTL - ASE

1 stop5h 49mAmerican Airlines

Sun 12/2812:30 pmASE - STL

1 stop5h 52mAmerican Airlines

Deal found 12/16

$339

Tue 12/239:55 amSTL - ASE

2 stops9h 47mUnited Airlines

Sun 12/288:00 amASE - STL

1 stop5h 26mUnited Airlines

Deal found 12/18

$474

Wed 12/318:05 amSTL - ASE

1 stop8h 25mUnited Airlines

Sun 1/45:00 pmASE - STL

1 stop4h 22mUnited Airlines

Deal found 12/16

$910

Best flights from St. Louis to Aspen
Discover carefully curated flight deals from St. Louis to Aspen that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated December 18, 2025.

Tue 6/25:20 amSTL - ASE

1 stop4h 31mUnited Airlines

Wed 6/1011:00 amASE - STL

1 stop4h 26mUnited Airlines

Deal found 12/17

$229

Tue 1/134:15 pmSTL - ASE

1 stop5h 00mUnited Airlines

Tue 1/2012:36 pmASE - STL

1 stop7h 22mUnited Airlines

Deal found 12/16

$284

Fri 1/236:00 pmSTL - ASE

1 stop4h 59mUnited Airlines

Sun 1/2512:36 pmASE - STL

1 stop7h 22mUnited Airlines

Deal found 12/16

$294

Sat 1/106:00 amSTL - ASE

1 stop7h 12mUnited Airlines

Wed 1/1412:36 pmASE - STL

1 stop7h 22mUnited Airlines

Deal found 12/15

$299

Last-minute flights from St. Louis to Aspen
Discover last-minute flight deals from St. Louis to Aspen. Data last updated December 18, 2025 and is based on user searches.

Tue 12/235:16 amSTL - ASE

1 stop5h 49mAmerican Airlines

Sun 12/2812:30 pmASE - STL

1 stop5h 52mAmerican Airlines

Deal found 12/16

$339

Fri 1/28:05 amSTL - ASE

1 stop8h 25mUnited Airlines

Tue 1/612:36 pmASE - STL

1 stop7h 22mUnited Airlines

Deal found 12/18

$384

Sat 1/101:15 pmSTL - ASE

1 stop6h 10mUnited Airlines

Wed 1/1412:36 pmASE - STL

1 stop7h 22mUnited Airlines

Deal found 12/17

$299

Tue 1/134:15 pmSTL - ASE

1 stop5h 00mUnited Airlines

Tue 1/2012:36 pmASE - STL

1 stop7h 22mUnited Airlines

Deal found 12/16

$284

Tue 1/139:25 amSTL - ASE

1 stop5h 53mAmerican Airlines

Tue 1/204:58 pmASE - STL

1 stop5h 01mAmerican Airlines

Deal found 12/16

$313

Fri 1/236:00 pmSTL - ASE

1 stop4h 59mUnited Airlines

Sun 1/2512:36 pmASE - STL

1 stop7h 22mUnited Airlines

Deal found 12/16

$294

One-way flights from St. Louis to Aspen
Search for one-way flight options from St. Louis to Aspen. Find affordable one-way fares based on user searches. Data last updated December 18, 2025.

Thu 2/126:00 amSTL - ASE

1 stop6h 03mAmerican Airlines

Deal found 12/17

$430

Thu 2/1211:46 amSTL - ASE

3 stops26h 23mAlaska Airlines

Deal found 12/17

$1,067

Find flight deals from St. Louis to Aspen

Most accurate provider	eDreams 3 stars
Most trusted provider	eDreams 3 stars
Round-trip from	$229 (United Airlines)
Popular in	November
Cheapest in	September
Average price	$425

Provider with most accurate pricing for Lambert-St Louis-Aspen Pitkin County flight deals.

Search Deals

Provider most trusted by Cheapflights users for Lambert-St Louis-Aspen Pitkin County flights.

Search Deals

From Lambert-St Louis to Aspen Pitkin County

Search Deals

High demand for flights, 3% potential price rise

Search Deals

Cheapest flight prices on average. 4% potential price decrease ($24 potential savings vs. average RT price).

Search Deals

Average for round-trip flights in December 2025

Search Deals

Fly from

Fly to

Route

Depart

Return

Price

St. LouisAspen

STL - ASE

STLASE

Lambert-St Louis

Tue 6/2

5:20 am-8:51 am

1 stop4h 31m

Aspen Pitkin County

Wed 6/10

11:00 am-4:26 pm

1 stop4h 26m

$229

St. LouisAspen

STL - ASE

STLASE

Lambert-St Louis

Tue 1/13

4:15 pm-8:15 pm

1 stop5h 00m

Aspen Pitkin County

Tue 1/20

12:36 pm-8:58 pm

1 stop7h 22m

$284

St. LouisAspen

STL - ASE

STLASE

Lambert-St Louis

Fri 1/23

6:00 pm-9:59 pm

1 stop4h 59m

Aspen Pitkin County

Sun 1/25

12:36 pm-8:58 pm

1 stop7h 22m

$294

St. LouisAspen

STL - ASE

STLASE

Lambert-St Louis

Sat 1/10

6:00 am-12:12 pm

1 stop7h 12m

Aspen Pitkin County

Wed 1/14

12:36 pm-8:58 pm

1 stop7h 22m

$299

St. LouisAspen

STL - ASE

STLASE

Lambert-St Louis

Thu 2/12

6:00 am-11:03 am

1 stop6h 03m

$430

St. LouisAspen

STL - ASE

STLASE

Lambert-St Louis

Thu 2/12

11:46 am-1:09 pm

3 stops26h 23m

$1,067

Flights are sorted by cheapest round-trip flights first.

Deals found on 12/17

Compare providers for flights from St. Louis to Aspen

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 December.

Provider	Price Accuracy	Trust Score*
Expedia	Price Accuracy2 stars	Trust Score*3 stars
FlightHub	Price Accuracy3 stars	Trust Score*1 star
eDreams	Price Accuracy3 stars	Trust 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 eDreams to be most consistent on Cheapflights vs. eDreams Users can find the same prices on St. Louis-Aspen flight deals on Cheapflights vs. eDreams >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 eDreams the most. eDreams 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, February is the cheapest month in which you can book a flight from St. Louis to Aspen (average of $214). 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

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

9,091 reviews

Reviews

1 / 20

4.0

Okay

Kevin,Dec 2025

BOS - EWR

Seems like every United flight has a delay and it’s always someone else’s fault. Step up and take some accountability

United Airlines

7.4

Good

9,091 reviews

United Airlines

7.4

Good

9,091 reviews

Reviews

1 / 20

4.0

Okay

Kevin,Dec 2025

BOS - EWR

Seems like every United flight has a delay and it’s always someone else’s fault. Step up and take some accountability

American Airlines

7.2

Good

11,054 reviews

United Airlines

7.4

Good

9,091 reviews

Reviews

1 / 20

4.0

Okay

Kevin,Dec 2025

BOS - EWR

Seems like every United flight has a delay and it’s always someone else’s fault. Step up and take some accountability

Related info for your journey

How long is the flight from St. Louis to Aspen?
Departing from St. Louis to Aspen will take you 4h 31m. There are 885 mi between St. Louis and Aspen.
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 $236. Another option worth looking into is United Airlines, starting at $318 round trip. American Airlines is currently priced 57% 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, February is the cheapest month in which you can book a flight from St. Louis to Aspen (average of $214). 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

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Alternative routes for St. Louis to Aspen

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Complete your trip

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Colorado Springs car rentals

Top 2 airlines flying from St. Louis to Aspen

Airline	Cheapest	Average	Flexibility	On-time
American Airlines	Cheapest$236	Average$458	FlexibilityNo cancel fee	On-time71%
United Airlines	Cheapest$318	Average$547	FlexibilityNo cancel fee	On-time69%

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$229+ Cheap flights from St. Louis to Aspen (STL - ASE)

This is the cheapest round-trip flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 6/2. Fares are subject to change and may not be available on all flights or dates of travel.

Find cheap flights from St. Louis to Aspen with Cheapflights

1. Tell us where you want to go

2. Select your favorite providers

3. Compare prices and book

Cheap flight deals from St. Louis to Aspen

Cheapest flights from St. Louis to AspenExplore 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 December 18, 2025.

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 December 18, 2025.

Find flight deals from St. Louis to Aspen

Most accurate provider

Most trusted provider

Round-trip from

Popular in

Cheapest in

Average price

Cheapflights Fare Finder

Use the filters below to find and compare flights from St. Louis to Aspen that are best for you.

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 December.

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.

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?

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

Reviews of airlines servicing Aspen

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.

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?

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

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

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

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

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

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Top 2 airlines flying from St. Louis to Aspen

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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 December 18, 2025.