$235+ 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 9/5. Fares are subject to change and may not be available on all flights or dates of travel.
STL — ASE
Sep 3 — Sep 101
Round-trip
1 adult, Economy
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Find cheap flights from St. Louis to Aspen with Cheapflights
1. Tell us where you want to go
Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”2. Select your favorite providers
We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.3. Compare prices and book
Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.Cheap flight deals from St. Louis to Aspen
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Best
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One-way
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 August 4, 2026.
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 August 4, 2026.
This United Airlines deal was found by Cheapflights users on 8/1. 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 9/189:00 am -
1 stop7h 08m
Tue 9/223:20 pm -
1 stop4h 18m
Deal found 8/1![United Airlines logo]()
$428
This United Airlines deal was found by Cheapflights users on 8/1. 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 10/249:00 am -
1 stop4h 34m
Fri 10/303:18 pm -
2 stops6h 57m
Deal found 8/1![United Airlines logo]()
$433
This United Airlines deal was found by Cheapflights users on 7/30. 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 9/19:00 am -
1 stop6h 23m
Wed 9/22:15 pm -
1 stop5h 31m
Deal found 7/30![United Airlines logo]()
$437
This United Airlines deal was found by Cheapflights users on 8/4. 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.
Mon 8/244:40 pm -
1 stop4h 36m
Thu 8/277:15 am -
1 stop6h 00m
Deal found 8/4![United Airlines logo]()
$465
This American Airlines deal was found by Cheapflights users on 8/2. 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.
Tue 9/16:36 am -
1 stop8h 14m
Tue 9/87:00 am -
1 stop16h 14m
Deal found 8/2![American Airlines logo]()
$487
This United Airlines deal was found by Cheapflights users on 8/3. 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 10/174:49 pm -
1 stop6h 02m
Wed 10/2111:20 am -
1 stop4h 17m
Deal found 8/3![United Airlines logo]()
$508
This United Airlines deal was found by Cheapflights users on 8/2. 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 9/16:15 am -
1 stop6h 14m
Tue 9/86:05 pm -
2 stops16h 52m
Deal found 8/2![United Airlines logo]()
$550
Best flights from St. Louis to AspenDiscover 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 August 4, 2026.
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 August 4, 2026.
This United Airlines deal was found by Cheapflights users on 8/1. 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 10/241:36 pm -
1 stop4h 42m
Fri 10/308:45 am -
1 stop7h 12m
Deal found 8/1![United Airlines logo]()
$428
This United Airlines deal was found by Cheapflights users on 8/2. 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 9/19:00 am -
1 stop6h 23m
Wed 9/22:15 pm -
1 stop5h 31m
Deal found 8/2![United Airlines logo]()
$437
This United Airlines deal was found by Cheapflights users on 8/4. 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.
Mon 8/244:40 pm -
1 stop4h 36m
Thu 8/277:15 am -
1 stop6h 00m
Deal found 8/4![United Airlines logo]()
$465
This United Airlines deal was found by Cheapflights users on 8/3. 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 10/174:49 pm -
1 stop6h 02m
Wed 10/2111:20 am -
1 stop4h 17m
Deal found 8/3![United Airlines logo]()
$508
This United Airlines deal was found by Cheapflights users on 8/1. 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 9/185:30 pm -
1 stop5h 25m
Tue 9/228:30 am -
2 stops11h 17m
Deal found 8/1![United Airlines logo]()
$513
This United Airlines deal was found by Cheapflights users on 8/2. 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 9/16:15 am -
1 stop6h 14m
Tue 9/86:05 pm -
2 stops16h 52m
Deal found 8/2![United Airlines logo]()
$550
This United Airlines deal was found by Cheapflights users on 8/1. 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 9/184:40 pm -
1 stop5h 49m
Sun 9/206:05 pm -
1 stop4h 26m
Deal found 8/1![United Airlines logo]()
$662
Last-minute flights from St. Louis to AspenDiscover last-minute flight deals from St. Louis to Aspen. Data last updated August 4, 2026 and is based on user searches.
Discover last-minute flight deals from St. Louis to Aspen. Data last updated August 4, 2026 and is based on user searches.
This United Airlines deal was found by Cheapflights users on 8/4. 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.
Mon 8/244:40 pm -
1 stop4h 36m
Thu 8/277:15 am -
1 stop6h 00m
Deal found 8/4![United Airlines logo]()
$465
This United Airlines deal was found by Cheapflights users on 7/30. 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 9/19:00 am -
1 stop6h 23m
Wed 9/22:15 pm -
1 stop5h 31m
Deal found 7/30![United Airlines logo]()
$437
This American Airlines deal was found by Cheapflights users on 8/2. 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.
Tue 9/16:36 am -
1 stop8h 14m
Tue 9/87:00 am -
1 stop16h 14m
Deal found 8/2![American Airlines logo]()
$487
This United Airlines deal was found by Cheapflights users on 8/2. 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 9/16:15 am -
1 stop6h 14m
Tue 9/86:05 pm -
2 stops16h 52m
Deal found 8/2![United Airlines logo]()
$550
This United Airlines deal was found by Cheapflights users on 8/1. 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 9/189:00 am -
1 stop7h 08m
Tue 9/223:20 pm -
1 stop4h 18m
Deal found 8/1![United Airlines logo]()
$428
One-way flights from St. Louis to AspenSearch for one-way flight options from St. Louis to Aspen. Find affordable one-way fares based on user searches. Data last updated August 4, 2026.
Search for one-way flight options from St. Louis to Aspen. Find affordable one-way fares based on user searches. Data last updated August 4, 2026.
This American Airlines deal was found by Cheapflights users on 8/1. 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 9/55:13 pm -
1 stop21h 11m
Deal found 8/1![American Airlines logo]()
$235
This United Airlines deal was found by Cheapflights users on 8/1. 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 9/57:25 am -
2 stops7h 58m
Deal found 8/1![United Airlines logo]()
$257
Find 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 August 4, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $428 (United Airlines) |
One-way from | $235 (American Airlines) |
Popular in | February |
Cheapest in | May |
Average price | $761 |
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 August 4, 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
Cheapest round-trip
St. LouisAspen
STL - ASE
STLASE
Lambert-St Louis
Sat 10/24
1:36 pm-5:18 pm
1 stop4h 42m
Aspen Pitkin County
Fri 10/30
8:45 am-4:57 pm
1 stop7h 12m
$428
St. LouisAspen
STL - ASE
STLASE
Lambert-St Louis
Tue 9/1
9:00 am-2:23 pm
1 stop6h 23m
Aspen Pitkin County
Wed 9/2
2:15 pm-8:46 pm
1 stop5h 31m
$437
St. LouisAspen
STL - ASE
STLASE
Lambert-St Louis
Mon 8/24
4:40 pm-8:16 pm
1 stop4h 36m
Aspen Pitkin County
Thu 8/27
7:15 am-2:15 pm
1 stop6h 00m
$465
St. LouisAspen
STL - ASE
STLASE
Lambert-St Louis
Sat 10/17
4:49 pm-9:51 pm
1 stop6h 02m
Aspen Pitkin County
Wed 10/21
11:20 am-4:37 pm
1 stop4h 17m
$508
St. LouisAspen
STL - ASE
STLASE
Lambert-St Louis
Fri 9/18
5:30 pm-9:55 pm
1 stop5h 25m
Aspen Pitkin County
Tue 9/22
8:30 am-8:47 pm
2 stops11h 17m
$513
St. LouisAspen
STL - ASE
STLASE
Lambert-St Louis
Tue 9/1
6:15 am-11:29 am
1 stop6h 14m
Aspen Pitkin County
Tue 9/8
6:05 pm-11:57 am
2 stops16h 52m
$550
Quickest round-trip
St. LouisAspen
STL - ASE
STLASE
Lambert-St Louis
Fri 9/18
4:40 pm-9:29 pm
1 stop5h 49m
Aspen Pitkin County
Sun 9/20
6:05 pm-11:31 pm
1 stop4h 26m
$662
Cheapest one-way
St. LouisAspen
STL - ASE
STLASE
Lambert-St Louis
Sat 9/5
5:13 pm-1:24 pm
1 stop21h 11m
$235
Quickest one-way
St. LouisAspen
STL - ASE
STLASE
Lambert-St Louis
Sat 9/5
7:25 am-2:23 pm
2 stops7h 58m
$257
Sorted by cheapest first
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 August.
| Provider | Price Accuracy | Trust Score* |
|---|---|---|
| Price Accuracy1 star | Trust Score*3 stars | |
| Price Accuracy3 stars | Trust Score*3 stars |
- 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.
STL-ASE
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.
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 August 4, 2026.
Read through reviews of airlines operating flights from St. Louis to Aspen, such as United Airlines. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
Boarding
7.7
Comfort
7.3
Food
6.6
Overall
7.4
Entertainment
7.1
Crew
8.1
Reviews
1 / 20
2.0
MediocreDawn,Aug 2026
ORD - DEN
Boarding
7.7
Comfort
7.3
Food
6.6
Overall
7.4
Entertainment
7.1
Crew
8.1
Reviews
1 / 20
2.0
MediocreDawn,Aug 2026
ORD - DEN
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.
Traveling to a place near Aspen?
Book flights to Aspen if you plan to visit one of these locationsSnowmass Village
Leadville
Snowmass
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Other flights to Aspen
Explore flights to Aspen departing from other origins. Flights are based on user searches made on Cheapflights and were last updated on August 4, 2026.
Complete your trip
Complete your trip to Aspen by adding a car rental and/or hotel reservation to your travel itinerary.
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St. Louis and Aspen flights
Browse other St. Louis and Aspen flight options. Last updated on August 4, 2026.
Other flights from St. Louis
Browse through other flights departing from St. Louis. Flights are based on user searches made on Cheapflights and were last updated on August 4, 2026.
Popular flight searches
Check out other popular destinations found by fellow travelers in 2026
Top airline flying from St. Louis to Aspen
Discover the top airline 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 August 4, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$269 | Average$459 | FlexibilityNo cancel fee | On-time69% |