$76+ Cheap flights from Austin to St. Louis (AUS - STL)
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 5/15. Fares are subject to change and may not be available on all flights or dates of travel.
AUS — STL
May 23 — May 301
Round-trip
1 adult, Economy
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Find cheap flights from Austin to St. Louis 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.Cheapflights Tip: The best prices from Austin Bergstrom to Lambert-St Louis are usually found in October or September, booked 58 days in advance, depart on a Tuesday or Saturday and return on a Saturday
Cheap flight deals from Austin to St. Louis
Cheapest
Best
Last-minute
One-way
Cheapest flights from Austin to St. LouisExplore the most affordable flight options available from Austin to St. Louis. Find the lowest fares from popular airlines and budget airlines, with prices last updated on April 23, 2026.
Explore the most affordable flight options available from Austin to St. Louis. Find the lowest fares from popular airlines and budget airlines, with prices last updated on April 23, 2026.
This Expedia deal was found by Cheapflights users on 4/22. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 5/1110:42 pm
AUS
- STL
1 stop19h 24m
Frontier
Thu 5/1412:36 pm
STL
- AUS
1 stop9h 11m
Frontier
Deal found 4/22![Frontier logo]()
$160
This CheapOair deal was found by Cheapflights users on 4/22. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 5/1110:42 pm
AUS
- STL
1 stop19h 24m
Frontier
Wed 5/136:51 pm
STL
- AUS
1 stop26h 56m
Frontier
Deal found 4/22![Frontier logo]()
$171
This CheapOair deal was found by Cheapflights users on 4/22. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 5/239:13 pm
AUS
- STL
1 stop22h 10m
Frontier
Tue 5/266:51 pm
STL
- AUS
1 stop26h 56m
Frontier
Deal found 4/22![Frontier logo]()
$176
This Southwest deal was found by Cheapflights users on 4/22. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 8/2612:55 pm
AUS
- STL
1 stop3h 30m
Southwest
Tue 9/110:15 am
STL
- AUS
1 stop4h 30m
Southwest
Deal found 4/22![Southwest logo]()
$177
This Frontier deal was found by Cheapflights users on 4/20. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 5/411:01 am
AUS
- STL
1 stop8h 31m
Frontier
Thu 5/712:36 pm
STL
- AUS
1 stop9h 11m
Frontier
Deal found 4/20![Frontier logo]()
$180
This Frontier deal was found by Cheapflights users on 4/20. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 5/2810:59 pm
AUS
- STL
1 stop21h 12m
Frontier
Mon 6/18:08 pm
STL
- AUS
1 stop13h 35m
Frontier
Deal found 4/20![Frontier logo]()
$181
This Southwest deal was found by Cheapflights users on 4/21. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 5/195:00 pm
AUS
- STL
1 stop5h 10m
Southwest
Tue 5/262:30 pm
STL
- AUS
Nonstop2h 10m
Southwest
Deal found 4/21![Southwest logo]()
$184
This American Airlines deal was found by Cheapflights users on 4/21. 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 5/196:00 am
AUS
- STL
1 stop5h 27m
American Airlines
Tue 5/265:25 am
STL
- AUS
1 stop5h 17m
American Airlines
Deal found 4/21![American Airlines logo]()
$187
Best flights from Austin to St. LouisDiscover carefully curated flight deals from Austin to St. Louis that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated April 23, 2026.
Discover carefully curated flight deals from Austin to St. Louis that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated April 23, 2026.
This Southwest deal was found by Cheapflights users on 4/22. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 5/123:50 pm
AUS
- STL
Nonstop2h 10m
Southwest
Sat 5/166:10 am
STL
- AUS
1 stop5h 30m
Southwest
Deal found 4/22![Southwest logo]()
$272
This United Airlines deal was found by Cheapflights users on 4/18. 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 10/212:20 pm
AUS
- STL
1 stop4h 41m
United Airlines
Sun 10/46:15 am
STL
- AUS
1 stop4h 51m
United Airlines
Deal found 4/18![United Airlines logo]()
$277
This Delta deal was found by Cheapflights users on 4/18. 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.
Sat 8/151:05 pm
AUS
- STL
1 stop7h 26m
Delta
Sun 8/167:05 pm
STL
- AUS
1 stop5h 14m
Delta
Deal found 4/18![Delta logo]()
$285
This Southwest deal was found by Cheapflights users on 4/20. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 5/53:30 pm
AUS
- STL
1 stop6h 15m
Southwest
Tue 5/124:25 pm
STL
- AUS
1 stop5h 15m
Southwest
Deal found 4/20![Southwest logo]()
$275
This Delta deal was found by Cheapflights users on 4/18. 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 7/266:24 pm
AUS
- STL
1 stop5h 29m
Delta
Fri 7/319:24 am
STL
- AUS
1 stop6h 26m
Delta
Deal found 4/18![Delta logo]()
$285
This Southwest deal was found by Cheapflights users on 4/19. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 6/23:50 pm
AUS
- STL
Nonstop2h 10m
Southwest
Thu 6/49:55 pm
STL
- AUS
Nonstop2h 00m
Southwest
Deal found 4/19![Southwest logo]()
$279
This Delta deal was found by Cheapflights users on 4/23. 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.
Fri 5/225:00 pm
AUS
- STL
1 stop6h 59m
Delta
Mon 5/257:05 am
STL
- AUS
1 stop5h 21m
Delta
Deal found 4/23![Delta logo]()
$289
This Southwest deal was found by Cheapflights users on 4/18. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 8/145:35 am
AUS
- STL
1 stop4h 10m
Southwest
Sun 8/168:45 pm
STL
- AUS
Nonstop2h 00m
Southwest
Deal found 4/18![Southwest logo]()
$289
This Southwest deal was found by Cheapflights users on 4/21. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 6/57:40 pm
AUS
- STL
1 stop6h 10m
Southwest
Sun 6/710:25 pm
STL
- AUS
Nonstop2h 00m
Southwest
Deal found 4/21![Southwest logo]()
$291
This Southwest deal was found by Cheapflights users on 4/18. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/173:55 pm
AUS
- STL
Nonstop2h 05m
Southwest
Tue 8/188:25 am
STL
- AUS
Nonstop2h 00m
Southwest
Deal found 4/18![Southwest logo]()
$301
Last-minute flights from Austin to St. LouisDiscover last-minute flight deals from Austin to St. Louis. Data last updated April 23, 2026 and is based on user searches.
Discover last-minute flight deals from Austin to St. Louis. Data last updated April 23, 2026 and is based on user searches.
This CheapOair deal was found by Cheapflights users on 4/21. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 4/238:39 pm
AUS
- STL
1 stop24h 34m
Frontier
Tue 5/266:51 pm
STL
- AUS
1 stop26h 56m
Frontier
Deal found 4/21![Frontier logo]()
$206
This Frontier deal was found by Cheapflights users on 4/20. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 5/411:01 am
AUS
- STL
1 stop8h 31m
Frontier
Thu 5/712:36 pm
STL
- AUS
1 stop9h 11m
Frontier
Deal found 4/20![Frontier logo]()
$180
This Expedia deal was found by Cheapflights users on 4/22. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 5/1110:42 pm
AUS
- STL
1 stop19h 24m
Frontier
Thu 5/1412:36 pm
STL
- AUS
1 stop9h 11m
Frontier
Deal found 4/22![Frontier logo]()
$160
This CheapOair deal was found by Cheapflights users on 4/22. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 5/1110:42 pm
AUS
- STL
1 stop19h 24m
Frontier
Wed 5/136:51 pm
STL
- AUS
1 stop26h 56m
Frontier
Deal found 4/22![Frontier logo]()
$171
This American Airlines deal was found by Cheapflights users on 4/20. 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 5/1310:56 am
AUS
- STL
1 stop5h 45m
American Airlines
Sat 5/165:20 am
STL
- AUS
1 stop4h 20m
American Airlines
Deal found 4/20![American Airlines logo]()
$211
This Southwest deal was found by Cheapflights users on 4/21. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 5/195:00 pm
AUS
- STL
1 stop5h 10m
Southwest
Tue 5/262:30 pm
STL
- AUS
Nonstop2h 10m
Southwest
Deal found 4/21![Southwest logo]()
$184
This American Airlines deal was found by Cheapflights users on 4/21. 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 5/196:00 am
AUS
- STL
1 stop5h 27m
American Airlines
Tue 5/265:25 am
STL
- AUS
1 stop5h 17m
American Airlines
Deal found 4/21![American Airlines logo]()
$187
This CheapOair deal was found by Cheapflights users on 4/22. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 5/239:13 pm
AUS
- STL
1 stop22h 10m
Frontier
Tue 5/266:51 pm
STL
- AUS
1 stop26h 56m
Frontier
Deal found 4/22![Frontier logo]()
$176
This Delta deal was found by Cheapflights users on 4/22. 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.
Wed 5/276:30 am
AUS
- STL
1 stop5h 55m
Delta
Thu 5/286:00 am
STL
- AUS
1 stop5h 22m
Delta
Deal found 4/22![Delta logo]()
$209
This Frontier deal was found by Cheapflights users on 4/20. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 5/2810:59 pm
AUS
- STL
1 stop21h 12m
Frontier
Mon 6/18:08 pm
STL
- AUS
1 stop13h 35m
Frontier
Deal found 4/20![Frontier logo]()
$181
One-way flights from Austin to St. LouisSearch for one-way flight options from Austin to St. Louis. Find affordable one-way fares based on user searches. Data last updated April 23, 2026.
Search for one-way flight options from Austin to St. Louis. Find affordable one-way fares based on user searches. Data last updated April 23, 2026.
This Expedia deal was found by Cheapflights users on 4/20. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 5/159:13 pm
AUS
- STL
1 stop22h 10m
Frontier
Deal found 4/20![Frontier logo]()
$76
This Kiwi.com deal was found by Cheapflights users on 4/22. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 6/19:13 pm
AUS
- STL
1 stop22h 10m
Frontier
Deal found 4/22![Frontier logo]()
$77
This Southwest deal was found by Cheapflights users on 4/20. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 5/2012:25 pm
AUS
- STL
Nonstop2h 05m
Southwest
Deal found 4/20![Southwest logo]()
$87
This Delta deal was found by Cheapflights users on 4/20. 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.
Wed 5/205:00 pm
AUS
- STL
1 stop6h 59m
Delta
Deal found 4/20![Delta logo]()
$91
This Kiwi.com deal was found by Cheapflights users on 4/23. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 5/195:47 pm
AUS
- STL
1 stop15h 08m
Frontier
Deal found 4/23![Frontier logo]()
$92
This Southwest deal was found by Cheapflights users on 4/20. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 5/1912:25 pm
AUS
- STL
Nonstop2h 05m
Southwest
Deal found 4/20![Southwest logo]()
$93
This Super.com deal was found by Cheapflights users on 4/20. 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 Super.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 5/710:42 pm
AUS
- STL
1 stop21h 41m
Frontier
Deal found 4/20![Frontier logo]()
$96
This CheapOair deal was found by Cheapflights users on 4/19. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 5/38:59 pm
AUS
- STL
1 stop26h 20m
Frontier
Deal found 4/19![Frontier logo]()
$102
This American Airlines deal was found by Cheapflights users on 4/21. 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 5/307:56 pm
AUS
- STL
1 stop4h 02m
American Airlines
Deal found 4/21![American Airlines logo]()
$107
This Priceline deal was found by Cheapflights users on 4/19. 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 Priceline is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 7/1812:02 pm
AUS
- STL
1 stop7h 34m
Frontier
Deal found 4/19![Frontier logo]()
$109
Find flight deals from Austin to St. Louis
Discover tips and strategies to find the most affordable flight options for your journey from Austin (AUS) to St. Louis (STL). 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 April 23, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $160 (Expedia) |
One-way from | $76 (Expedia) |
Popular in | March |
Cheapest in | October |
Average price | $325 |
Good round-trip deal | $302 or less |
Good one-way deal | $228 or less |
Cheapflights Fare Finder
Customize your flight search to find flights from Austin to St. Louis 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 April 23, 2026.
Use the filters below to find and compare flights from Austin to St. Louis that are best for you.
Fly from
Fly to
Route
Depart
Return
Cheapest round-trip
AustinSt. Louis
AUS - STL
AUSSTL
Austin Bergstrom
Tue 5/12
3:50 pm-6:00 pm
Nonstop2h 10m
Lambert-St Louis
Sat 5/16
6:10 am-11:40 am
1 stop5h 30m
$272
AustinSt. Louis
AUS - STL
AUSSTL
Austin Bergstrom
Tue 5/5
3:30 pm-9:45 pm
1 stop6h 15m
Lambert-St Louis
Tue 5/12
4:25 pm-9:40 pm
1 stop5h 15m
$275
AustinSt. Louis
AUS - STL
AUSSTL
Austin Bergstrom
Fri 10/2
12:20 pm-5:01 pm
1 stop4h 41m
Lambert-St Louis
Sun 10/4
6:15 am-11:06 am
1 stop4h 51m
$277
AustinSt. Louis
AUS - STL
AUSSTL
Austin Bergstrom
Tue 6/2
3:50 pm-6:00 pm
Nonstop2h 10m
Lambert-St Louis
Thu 6/4
9:55 pm-11:55 pm
Nonstop2h 00m
$279
AustinSt. Louis
AUS - STL
AUSSTL
Austin Bergstrom
Sat 8/15
1:05 pm-8:31 pm
1 stop7h 26m
Lambert-St Louis
Sun 8/16
7:05 pm-12:19 am
1 stop5h 14m
$285
AustinSt. Louis
AUS - STL
AUSSTL
Austin Bergstrom
Sun 7/26
6:24 pm-11:53 pm
1 stop5h 29m
Lambert-St Louis
Fri 7/31
9:24 am-3:50 pm
1 stop6h 26m
$285
AustinSt. Louis
AUS - STL
AUSSTL
Austin Bergstrom
Fri 5/22
5:00 pm-11:59 pm
1 stop6h 59m
Lambert-St Louis
Mon 5/25
7:05 am-12:26 pm
1 stop5h 21m
$289
AustinSt. Louis
AUS - STL
AUSSTL
Austin Bergstrom
Fri 8/14
5:35 am-9:45 am
1 stop4h 10m
Lambert-St Louis
Sun 8/16
8:45 pm-10:45 pm
Nonstop2h 00m
$289
AustinSt. Louis
AUS - STL
AUSSTL
Austin Bergstrom
Fri 6/5
7:40 pm-1:50 am
1 stop6h 10m
Lambert-St Louis
Sun 6/7
10:25 pm-12:25 am
Nonstop2h 00m
$291
Quickest round-trip
AustinSt. Louis
AUS - STL
AUSSTL
Austin Bergstrom
Mon 8/17
3:55 pm-6:00 pm
Nonstop2h 05m
Lambert-St Louis
Tue 8/18
8:25 am-10:25 am
Nonstop2h 00m
$301
Showing 1-10 of 20 resultsSorted by cheapest first
Compare providers for flights from Austin to St. Louis
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 Austin to St. Louis in April.
| Provider | Price Accuracy | Trust Score* |
|---|---|---|
| Price Accuracy1 star | Trust Score*3 stars | |
| Price Accuracy3 stars | Trust Score*3 stars | |
| Price Accuracy- | Trust Score*3 stars | |
| Price Accuracy1 star | Trust Score*3 stars | |
| Price Accuracy3 stars | Trust Score*3 stars |
- Most accurate provider: When it comes to deals on Austin-St. Louis flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on Austin-St. Louis flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from Austin-St. Louis flight searches over the past month and is updated monthly.
- Most trusted provider: When it comes to deals on Austin-St. Louis 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 Austin-St. Louis 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 Austin to St. Louis
Have a flexible travel schedule? Discover the best time to fly to St. Louis from Austin with our price prediction graph.
AUS-STL
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 Austin to St. Louis
How far ahead should I book a flight from Austin to St. Louis?
The price you pay for your flight from Austin to St. Louis may vary depending on when you book. For the best chance of a lower fare, look to book 57 days in advance of your trip. Fares are likely to increase a fortnight or so before your departure date.
What is the cheapest month to book a flight from Austin to St. Louis?
Currently, October is the cheapest month in which you can book a flight from Austin to St. Louis (average of $268). Flying from Austin to St. Louis in March is currently the most expensive (average of $394). 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.
What is the cheapest time of day to fly from AUS to STL?
Find hourly flight availability from Austin to St. Louis. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated April 23, 2026.
Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from Austin to St. Louis as you normally would.
Reviews of airlines servicing St. Louis
Get insights into the airlines that provide service to St. Louis. 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 St. Louis. Reviews last updated April 23, 2026.
Read through reviews of airlines operating flights from Austin to St. Louis, such as Southwest,United Airlines, andAmerican Airlines. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
Entertainment
7.5
Crew
8.6
Overall
8.0
Food
7.0
Comfort
8.0
Boarding
8.1
Reviews
1 / 20
6.0
GoodScott,Feb 2026
HOU - FLL
Entertainment
7.5
Crew
8.6
Overall
8.0
Food
7.0
Comfort
8.0
Boarding
8.1
Reviews
1 / 20
6.0
GoodScott,Feb 2026
HOU - FLL
Entertainment
7.5
Crew
8.6
Overall
8.0
Food
7.0
Comfort
8.0
Boarding
8.1
Reviews
1 / 20
6.0
GoodScott,Feb 2026
HOU - FLL
Entertainment
7.5
Crew
8.6
Overall
8.0
Food
7.0
Comfort
8.0
Boarding
8.1
Reviews
1 / 20
6.0
GoodScott,Feb 2026
HOU - FLL
Entertainment
7.5
Crew
8.6
Overall
8.0
Food
7.0
Comfort
8.0
Boarding
8.1
Reviews
1 / 20
6.0
GoodScott,Feb 2026
HOU - FLL
Related info for your journey
Find useful and relevant information for your journey from Austin to St. Louis. 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 St. Louis?
Book flights to St. Louis if you plan to visit one of these locationsEdwardsville
O'Fallon
Fenton
Swansea
Fairview Heights
Maryland Heights
Collinsville
Eureka
Wentzville
Glencoe
Chesterfield
Alton
Farmington
Festus
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Austin and St. Louis flights
Browse other Austin and St. Louis flight options. Last updated on April 23, 2026.
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Top 4 airlines flying from Austin to St. Louis
Discover the top 4 airlines that operate flights from Austin to St. Louis. 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 April 23, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$160 | Average$300 | FlexibilityNo cancel fee | On-time62% | |
| Cheapest$202 | Average$343 | FlexibilityNo cancel fee | On-time63% | |
| Cheapest$248 | Average$313 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$254 | Average$408 | FlexibilityNo cancel fee | On-time71% |