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 $307. Another option worth looking into is United Airlines, starting at $379 round trip. American Airlines is currently priced 46% below the average price you’ll pay for this route.

What is the cheapest day to fly from St. Louis to Aspen?

Travelers seeking maximum savings on their St. Louis to Aspen flight should consider departing on Saturday at noon when fares are most often at their lowest. Thursday at noon flights should be avoided if possible as fares are typically the most expensive at this time.

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 day to fly round-trip from St. Louis to Aspen?

Flying to your destination on a Wednesday can be more expensive, but this shouldn’t discourage you from finding affordable options to get to Aspen. Check prices with Cheapflights to find a great deal for your trip.

What is the cheapest month to fly from St. Louis to Aspen?

Due to multiple factors, expect to potentially pay more when booking in March. For low rates, November can be a great choice for travel to Aspen. Flights to Aspen from St. Louis in November are about $576 on average during November, but can be found for as low as $361.

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

When flying from St. Louis to Aspen, the time of day you fly usually plays a role in the price. Save by searching for a flight in the morning, which can drop the price by up to 15% versus a flight in the afternoon.

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.

$248+ Flights from St. Louis to Aspen

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Cheap flight deals from St. Louis to Aspen

Round-trip from	$307 (American Airlines)
Popular in	March
Cheapest in	November
Average price	$529

From Lambert-St Louis to Aspen Pitkin County

Search Deals

Highest demand for flights based on searches. 6% potential increase in price ($39 potential increase over avg. RT price).

Search Deals

Cheapest flight prices on average. 3% potential price decrease ($21 potential savings vs. average RT price).

Search Deals

Average for round-trip flights in July 2025

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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 July 3, 2025.

Fri 10/35:15 amSTL - ASE

1 stop4h 57mUnited Airlines

Sat 10/118:40 amASE - STL

1 stop6h 52mUnited Airlines

Deal found 7/1

$248

Fri 9/267:23 amSTL - ASE

1 stop5h 18mAmerican Airlines

Sat 10/412:16 pmASE - STL

1 stop5h 11mAmerican Airlines

Deal found 7/1

$307

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 July 3, 2025.

Fri 9/267:23 amSTL - ASE

1 stop5h 18mAmerican Airlines

Sat 10/412:16 pmASE - STL

1 stop5h 11mAmerican Airlines

Deal found 7/1

$307

Sat 7/125:15 amSTL - ASE

1 stop4h 27mUnited Airlines

Thu 7/176:15 pmASE - STL

1 stop4h 44mUnited Airlines

Deal found 7/2

$379

Last-minute flights from St. Louis to Aspen
Discover last-minute flight deals from St. Louis to Aspen. Data last updated July 3, 2025 and is based on user searches.

Sat 7/126:00 amSTL - ASE

1 stop8h 07mAmerican Airlines

Wed 7/164:35 pmASE - STL

1 stop5h 22mAmerican Airlines

Deal found 7/2

$349

Sat 7/125:15 amSTL - ASE

1 stop4h 27mUnited Airlines

Thu 7/176:15 pmASE - STL

1 stop4h 44mUnited Airlines

Deal found 7/2

$379

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 July 3, 2025.

Thu 7/244:45 pmSTL - ASE

1 stop5h 34mUnited Airlines

Deal found 7/1

$470

Thu 7/243:24 pmSTL - ASE

3 stops25h 38mAlaska Airlines

Deal found 7/1

$1,399

Cheapflights Fare Finder

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

Fri 9/26

7:23 am-11:41 am

1 stop5h 18m

Aspen Pitkin County

Sat 10/4

12:16 pm-6:27 pm

1 stop5h 11m

$307

St. LouisAspen

STL - ASE

STLASE

Lambert-St Louis

Sat 7/12

5:15 am-8:42 am

1 stop4h 27m

Aspen Pitkin County

Thu 7/17

6:15 pm-11:59 pm

1 stop4h 44m

$379

St. LouisAspen

STL - ASE

STLASE

Lambert-St Louis

Thu 7/24

4:45 pm-9:19 pm

1 stop5h 34m

$470

St. LouisAspen

STL - ASE

STLASE

Lambert-St Louis

Thu 7/24

3:24 pm-4:02 pm

3 stops25h 38m

$1,399

Flights are sorted by cheapest round-trip flights first.

Deals found on 7/1

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, November is the cheapest month in which you can book a flight from St. Louis to Aspen (average of $448). Flying from St. Louis to Aspen in December is currently the most expensive (average of $668). 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.

Reviews of airlines servicing Aspen

Read through reviews of airlines operating flights from St. Louis to Aspen, such as Alaska Airlines, United Airlines, and American Airlines. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.

Alaska Airlines

8.0

Very good

10,000 reviews

Reviews

1 / 20

10.0

Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.

Alaska Airlines

8.0

Very good

10,000 reviews

Alaska Airlines

8.0

Very good

10,000 reviews

Reviews

1 / 20

10.0

Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.

United Airlines

7.4

Good

8,845 reviews

Alaska Airlines

8.0

Very good

10,000 reviews

Reviews

1 / 20

10.0

Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.

American Airlines

7.2

Good

10,000 reviews

Alaska Airlines

8.0

Very good

10,000 reviews

Reviews

1 / 20

10.0

Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.

Related info for your journey

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 $307. Another option worth looking into is United Airlines, starting at $379 round trip. American Airlines is currently priced 46% 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, November is the cheapest month in which you can book a flight from St. Louis to Aspen (average of $448). Flying from St. Louis to Aspen in December is currently the most expensive (average of $668). 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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Top 2 airlines flying from St. Louis to Aspen

Airline	Cheapest	Average	Flexibility	On-time
American Airlines	Cheapest$328	Average$587	FlexibilityNo cancel fee	On-time71%
United Airlines	Cheapest$361	Average$611	FlexibilityNo cancel fee	On-time69%

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$248+ 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 10/3. 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

Round-trip from

Popular in

Cheapest in

Average price

Find 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 July 3, 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 July 3, 2025.

Cheapflights Fare Finder

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

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?

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 July 3, 2025.

Read through reviews of airlines operating flights from St. Louis to Aspen, such as Alaska Airlines, 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.

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?

Traveling to a place near St. Louis?

Browse thousands of different options on Cheapflights for your next trip

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Alternative routes for 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 July 3, 2025.