$189+ 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 10/6. Fares are subject to change and may not be available on all flights or dates of travel.
STL — ASE
Sep 30 — Oct 71
Round-trip
1 adult, Economy
We work with more than 300 partners to bring you better travel deals
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
Cheapest
Best
Last-minute
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 31, 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 31, 2026.
This American Airlines deal was found by Cheapflights users on 8/28. 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 10/65:00 am -
1 stop8h 16m
Thu 10/87:30 am -
1 stop6h 00m
Deal found 8/28![American Airlines logo]()
$377
This Delta deal was found by Cheapflights users on 8/31. 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.
Sun 11/226:00 am -
1 stop6h 43m
Thu 11/261:52 pm -
1 stop8h 01m
Deal found 8/31![Delta logo]()
$408
This United Airlines deal was found by Cheapflights users on 8/28. 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 10/136:15 am -
1 stop6h 47m
Sun 10/186:05 pm -
1 stop4h 39m
Deal found 8/28![United Airlines logo]()
$438
This United Airlines deal was found by Cheapflights users on 8/27. 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 11/108:50 am -
1 stop4h 58m
Wed 11/118:45 am -
1 stop7h 12m
Deal found 8/27![United Airlines logo]()
$457
This American Airlines deal was found by Cheapflights users on 8/28. 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.
Sun 9/135:43 am -
1 stop7h 38m
Wed 9/1610:31 am -
1 stop7h 36m
Deal found 8/28![American Airlines logo]()
$485
This American Airlines deal was found by Cheapflights users on 8/28. 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 9/123:34 pm -
1 stop5h 39m
Tue 9/157:00 am -
1 stop5h 16m
Deal found 8/28![American Airlines logo]()
$497
This American Airlines deal was found by Cheapflights users on 8/28. 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.
Wed 10/146:32 am -
1 stop6h 54m
Sun 10/1812:48 pm -
1 stop7h 09m
Deal found 8/28![American Airlines logo]()
$499
This United Airlines deal was found by Cheapflights users on 8/28. 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 9/123:32 pm -
2 stops6h 57m
Tue 9/153:20 pm -
1 stop4h 18m
Deal found 8/28![United Airlines logo]()
$502
This United Airlines deal was found by Cheapflights users on 8/28. 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 10/611:35 am -
2 stops7h 53m
Thu 10/81:15 pm -
1 stop6h 21m
Deal found 8/28![United Airlines logo]()
$513
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 31, 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 31, 2026.
This American Airlines deal was found by Cheapflights users on 8/31. 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 10/66:32 am -
1 stop6h 54m
Thu 10/812:48 pm -
1 stop7h 09m
Deal found 8/31![American Airlines logo]()
$377
This United Airlines deal was found by Cheapflights users on 8/28. 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 10/136:15 am -
1 stop6h 47m
Sun 10/186:05 pm -
1 stop4h 39m
Deal found 8/28![United Airlines logo]()
$438
This United Airlines deal was found by Cheapflights users on 8/28. 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 11/108:50 am -
1 stop4h 58m
Wed 11/118:45 am -
1 stop7h 12m
Deal found 8/28![United Airlines logo]()
$457
Last-minute flights from St. Louis to AspenDiscover last-minute flight deals from St. Louis to Aspen. Data last updated August 31, 2026 and is based on user searches.
Discover last-minute flight deals from St. Louis to Aspen. Data last updated August 31, 2026 and is based on user searches.
This American Airlines deal was found by Cheapflights users on 8/28. 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 9/123:34 pm -
1 stop5h 39m
Tue 9/157:00 am -
1 stop5h 16m
Deal found 8/28![American Airlines logo]()
$497
This United Airlines deal was found by Cheapflights users on 8/28. 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 9/123:32 pm -
2 stops6h 57m
Tue 9/153:20 pm -
1 stop4h 18m
Deal found 8/28![United Airlines logo]()
$502
This American Airlines deal was found by Cheapflights users on 8/28. 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.
Sun 9/135:43 am -
1 stop7h 38m
Wed 9/1610:31 am -
1 stop7h 36m
Deal found 8/28![American Airlines logo]()
$485
This United Airlines deal was found by Cheapflights users on 8/28. 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.
Sun 9/136:00 am -
1 stop6h 10m
Wed 9/167:15 am -
2 stops13h 16m
Deal found 8/28![United Airlines logo]()
$564
This United Airlines deal was found by Cheapflights users on 8/29. 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
Mon 9/218:30 am -
1 stop7h 04m
Deal found 8/29![United Airlines logo]()
$604
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 31, 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 31, 2026.
This United Airlines deal was found by Cheapflights users on 8/27. 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 10/64:39 pm -
1 stop4h 42m
Deal found 8/27![United Airlines logo]()
$189
This American Airlines deal was found by Cheapflights users on 8/30. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 2/45:17 am -
1 stop5h 57m
Deal found 8/30![American Airlines logo]()
$262
This United Airlines deal was found by Cheapflights users on 8/26. 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.
Wed 9/161:36 pm -
1 stop6h 10m
Deal found 8/26![United Airlines logo]()
$321
This United Airlines deal was found by Cheapflights users on 8/30. 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.
Thu 2/48:05 am -
2 stops13h 10m
Deal found 8/30![United Airlines logo]()
$415
This United Airlines deal was found by Cheapflights users on 8/30. 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.
Thu 9/178:30 am -
2 stops7h 38m
Deal found 8/30![United Airlines logo]()
$530
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 31, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $377 (American Airlines) |
One-way from | $189 (United Airlines) |
Popular in | July |
Cheapest in | May |
Average price | $620 |
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 7,457,451 searches. Data last updated August 31, 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 Lambert-St Louis - ASE Aspen Pitkin County
STLASE
Lambert-St Louis
Tue 10/6
6:32 am-12:26 pm
1 stop6h 54m
Aspen Pitkin County
Thu 10/8
12:48 pm-8:57 pm
1 stop7h 09m
$377
Quickest round-trip
St. LouisAspen
STL Lambert-St Louis - ASE Aspen Pitkin County
STLASE
Lambert-St Louis
Tue 10/13
6:15 am-12:02 pm
1 stop6h 47m
Aspen Pitkin County
Sun 10/18
6:05 pm-11:44 pm
1 stop4h 39m
$438
St. LouisAspen
STL Lambert-St Louis - ASE Aspen Pitkin County
STLASE
Lambert-St Louis
Tue 11/10
8:50 am-12:48 pm
1 stop4h 58m
Aspen Pitkin County
Wed 11/11
8:45 am-4:57 pm
1 stop7h 12m
$457
Cheapest one-way
Quickest one-way
St. LouisAspen
STL Lambert-St Louis - ASE Aspen Pitkin County
STLASE
Lambert-St Louis
Tue 10/6
4:39 pm-8:21 pm
1 stop4h 42m
$189
St. LouisAspen
STL Lambert-St Louis - ASE Aspen Pitkin County
STLASE
Lambert-St Louis
Thu 2/4
5:17 am-10:14 am
1 stop5h 57m
$262
St. LouisAspen
STL Lambert-St Louis - ASE Aspen Pitkin County
STLASE
Lambert-St Louis
Thu 9/17
5:10 am-10:44 am
1 stop6h 34m
$321
St. LouisAspen
STL Lambert-St Louis - ASE Aspen Pitkin County
STLASE
Lambert-St Louis
Wed 9/16
1:36 pm-6:46 pm
1 stop6h 10m
$321
St. LouisAspen
STL Lambert-St Louis - ASE Aspen Pitkin County
STLASE
Lambert-St Louis
Thu 2/4
8:05 am-8:15 pm
2 stops13h 10m
$415
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 31, 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.
Crew
8.1
Entertainment
7.1
Overall
7.4
Boarding
7.7
Comfort
7.3
Food
6.7
Reviews
1 / 20
2.0
MediocreDawn,Aug 2026
ORD - DEN
Crew
8.1
Entertainment
7.1
Overall
7.4
Boarding
7.7
Comfort
7.3
Food
6.7
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
Browse thousands of different options on Cheapflights for your next trip
Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.
Alternative routes
Aspen flight routes
Complete your trip
Flights by cabin class
Other flight options
Other flights from St. Louis
Popular flights
Alternative routes for St. Louis to Aspen
See prices for flight routes from nearby airports that may be better suited for you.
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 31, 2026.
Complete your trip
Complete your trip to Aspen by adding a car rental and/or hotel reservation to your travel itinerary.
Search flights from St. Louis to Aspen by cabin class
Find flights from St. Louis to Aspen, based on your preferred cabin class, be it economy, premium economy, business, or first class.
St. Louis and Aspen flights
Browse other St. Louis and Aspen flight options. Last updated on August 31, 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 31, 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 7,457,451 searches. Data last updated August 31, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$269 | Average$460 | FlexibilityNo cancel fee | On-time69% |