$83+ Cheap flights from St. Louis to Austin (STL - AUS)
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 11/4. Fares are subject to change and may not be available on all flights or dates of travel.
STL — AUS
Oct 4 — Oct 111
Round-trip
1 adult, Economy
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Find cheap flights from St. Louis to Austin 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 Lambert-St Louis to Austin Bergstrom are usually found in February or January, booked 84 days in advance, depart on a Saturday or Wednesday and return on a Friday
Cheap flight deals from St. Louis to Austin
Cheapest
Best
Last-minute
One-way
Cheapest flights from St. Louis to AustinExplore the most affordable flight options available from St. Louis to Austin. Find the lowest fares from popular airlines and budget airlines, with prices last updated on September 4, 2026.
Explore the most affordable flight options available from St. Louis to Austin. Find the lowest fares from popular airlines and budget airlines, with prices last updated on September 4, 2026.
This CheapOair deal was found by Cheapflights users on 9/2. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/712:17 pm -
1 stop23h 06m
Wed 10/1412:08 pm -
1 stop5h 32m
Deal found 9/2![Frontier logo]()
$168
This Frontier deal was found by Cheapflights users on 9/2. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/2412:27 pm -
1 stop9h 42m
Mon 9/2812:12 pm -
1 stop23h 20m
Deal found 9/2![Frontier logo]()
$182
This Kiwi.com deal was found by Cheapflights users on 9/3. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/166:35 pm -
1 stop16h 22m
Fri 10/2312:08 pm -
1 stop5h 32m
Deal found 9/3![Frontier logo]()
$188
This Kiwi.com 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/52:29 pm -
1 stop27h 19m
Wed 10/1412:08 pm -
1 stop5h 32m
Deal found 8/31![Frontier logo]()
$190
This CheapOair deal was found by Cheapflights users on 9/1. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/2312:17 pm -
1 stop22h 58m
Mon 9/2812:12 pm -
1 stop23h 20m
Deal found 9/1![Frontier logo]()
$192
This Trip.com deal was found by Cheapflights users on 9/1. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/2212:17 pm -
1 stop26h 20m
Mon 9/2812:12 pm -
1 stop23h 20m
Deal found 9/1![Frontier logo]()
$197
This CheapOair deal was found by Cheapflights users on 9/2. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/154:30 pm -
1 stop17h 27m
Mon 10/1910:52 am -
1 stop12h 21m
Deal found 9/2![Frontier logo]()
$198
This Super.com deal was found by Cheapflights users on 9/1. 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 Super.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/285:19 pm -
1 stop16h 44m
Wed 9/303:32 pm -
1 stop19h 45m
Deal found 9/1![Frontier logo]()
$200
This Kiwi.com 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/52:29 pm -
1 stop27h 19m
Fri 10/1612:08 pm -
1 stop5h 32m
Deal found 8/31![Frontier logo]()
$201
This Super.com deal was found by Cheapflights users on 9/1. 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 Super.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/2212:17 pm -
1 stop26h 20m
Tue 10/63:32 pm -
1 stop20h 00m
Deal found 9/1![Frontier logo]()
$204
Best flights from St. Louis to AustinDiscover carefully curated flight deals from St. Louis to Austin that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated September 4, 2026.
Discover carefully curated flight deals from St. Louis to Austin that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated September 4, 2026.
This Southwest deal was found by Cheapflights users on 9/1. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/25:10 pm -
1 stop6h 20m
Sat 11/72:15 pm -
Nonstop2h 05m
Deal found 9/1![Southwest logo]()
$241
This United Airlines deal was found by Cheapflights users on 9/4. 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.
Fri 11/205:55 pm -
1 stop5h 20m
Tue 11/244:17 pm -
1 stop6h 09m
Deal found 9/4![United Airlines logo]()
$289
This Southwest deal was found by Cheapflights users on 9/1. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/224:45 pm -
1 stop6h 10m
Tue 10/67:30 am -
Nonstop2h 05m
Deal found 9/1![Southwest logo]()
$241
This Southwest deal was found by Cheapflights users on 9/3. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/169:45 pm -
Nonstop2h 10m
Fri 10/236:55 pm -
Nonstop2h 05m
Deal found 9/3![Southwest logo]()
$251
This Southwest 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/41:55 pm -
Nonstop2h 05m
Wed 11/183:15 pm -
Nonstop2h 05m
Deal found 8/31![Southwest logo]()
$275
This United Airlines deal was found by Cheapflights users on 9/1. 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.
Wed 10/76:00 am -
2 stops9h 21m
Fri 10/95:39 pm -
1 stop4h 51m
Deal found 9/1![United Airlines logo]()
$353
This Southwest deal was found by Cheapflights users on 9/1. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/78:50 pm -
Nonstop2h 10m
Fri 10/97:50 pm -
1 stop4h 50m
Deal found 9/1![Southwest logo]()
$279
This Southwest deal was found by Cheapflights users on 9/2. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/228:50 pm -
Nonstop2h 05m
Wed 10/712:35 pm -
Nonstop2h 05m
Deal found 9/2![Southwest logo]()
$299
This Southwest deal was found by Cheapflights users on 9/3. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/265:10 am -
1 stop5h 05m
Mon 11/307:30 am -
Nonstop2h 00m
Deal found 9/3![Southwest logo]()
$319
This Southwest 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/178:25 am -
Nonstop2h 00m
Sun 9/209:00 pm -
Nonstop2h 10m
Deal found 8/30![Southwest logo]()
$347
This Southwest 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/239:45 pm -
Nonstop2h 10m
Sun 10/255:05 am -
1 stop4h 20m
Deal found 8/31![Southwest logo]()
$363
This Southwest deal was found by Cheapflights users on 9/3. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/19:45 pm -
Nonstop2h 05m
Thu 10/81:40 pm -
Nonstop2h 05m
Deal found 9/3![Southwest logo]()
$364
Last-minute flights from St. Louis to AustinDiscover last-minute flight deals from St. Louis to Austin. Data last updated September 4, 2026 and is based on user searches.
Discover last-minute flight deals from St. Louis to Austin. Data last updated September 4, 2026 and is based on user searches.
This Trip.com deal was found by Cheapflights users on 9/1. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/2212:17 pm -
1 stop26h 20m
Mon 9/2812:12 pm -
1 stop23h 20m
Deal found 9/1![Frontier logo]()
$197
This Super.com deal was found by Cheapflights users on 9/1. 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 Super.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/2212:17 pm -
1 stop26h 20m
Tue 10/63:32 pm -
1 stop20h 00m
Deal found 9/1![Frontier logo]()
$204
This CheapOair deal was found by Cheapflights users on 9/1. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/2312:17 pm -
1 stop22h 58m
Mon 9/2812:12 pm -
1 stop23h 20m
Deal found 9/1![Frontier logo]()
$192
This Frontier deal was found by Cheapflights users on 9/2. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/2412:27 pm -
1 stop9h 42m
Mon 9/2812:12 pm -
1 stop23h 20m
Deal found 9/2![Frontier logo]()
$182
This Super.com deal was found by Cheapflights users on 9/1. 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 Super.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/285:19 pm -
1 stop16h 44m
Wed 9/303:32 pm -
1 stop19h 45m
Deal found 9/1![Frontier logo]()
$200
This Kiwi.com 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/52:29 pm -
1 stop27h 19m
Wed 10/1412:08 pm -
1 stop5h 32m
Deal found 8/31![Frontier logo]()
$190
This Kiwi.com 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/52:29 pm -
1 stop27h 19m
Fri 10/1612:08 pm -
1 stop5h 32m
Deal found 8/31![Frontier logo]()
$201
This CheapOair deal was found by Cheapflights users on 9/2. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/712:17 pm -
1 stop23h 06m
Wed 10/1412:08 pm -
1 stop5h 32m
Deal found 9/2![Frontier logo]()
$168
This CheapOair deal was found by Cheapflights users on 9/2. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/154:30 pm -
1 stop17h 27m
Mon 10/1910:52 am -
1 stop12h 21m
Deal found 9/2![Frontier logo]()
$198
This Kiwi.com deal was found by Cheapflights users on 9/3. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/166:35 pm -
1 stop16h 22m
Fri 10/2312:08 pm -
1 stop5h 32m
Deal found 9/3![Frontier logo]()
$188
One-way flights from St. Louis to AustinSearch for one-way flight options from St. Louis to Austin. Find affordable one-way fares based on user searches. Data last updated September 4, 2026.
Search for one-way flight options from St. Louis to Austin. Find affordable one-way fares based on user searches. Data last updated September 4, 2026.
This Kiwi.com deal was found by Cheapflights users on 9/3. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/46:44 pm -
1 stop19h 10m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/3![Frontier logo]()
$83
This Kiwi.com deal was found by Cheapflights users on 9/4. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/52:29 pm -
1 stop27h 19m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/4![Frontier logo]()
$86
This Kiwi.com deal was found by Cheapflights users on 9/2. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/282:29 pm -
1 stop27h 19m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/2![Frontier logo]()
$87
This Kiwi.com deal was found by Cheapflights users on 9/1. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/26:44 pm -
1 stop16h 41m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/1![Frontier logo]()
$88
This Kiwi.com deal was found by Cheapflights users on 9/4. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/306:44 pm -
1 stop18h 16m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/4![Frontier logo]()
$89
This Super.com deal was found by Cheapflights users on 9/2. 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 Super.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/2412:27 pm -
1 stop9h 42m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/2![Frontier logo]()
$90
This Super.com deal was found by Cheapflights users on 9/2. 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 Super.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/16:39 pm -
1 stop15h 24m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/2![Frontier logo]()
$96
This Kiwi.com 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/22:29 pm -
1 stop27h 19m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 8/31![Frontier logo]()
$97
This CheapOair deal was found by Cheapflights users on 9/2. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/2212:17 pm -
1 stop26h 20m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/2![Frontier logo]()
$98
This Kiwi.com deal was found by Cheapflights users on 9/3. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/236:35 pm -
1 stop16h 22m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/3![Frontier logo]()
$100
Find flight deals from St. Louis to Austin
Discover tips and strategies to find the most affordable flight options for your journey from St. Louis (STL) to Austin (AUS). 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 September 4, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $168 (CheapOair) |
One-way from | $83 (Kiwi.com) |
Popular in | March |
Cheapest in | February |
Average price | $347 |
Good round-trip deal | $245 or less |
Good one-way deal | $182 or less |
Cheapflights Fare Finder
Customize your flight search to find flights from St. Louis to Austin 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 September 4, 2026.
Use the filters below to find and compare flights from St. Louis to Austin that are best for you.
Fly from
Fly to
Route
Depart
Return
Cheapest round-trip
St. LouisAustin
STL Lambert-St Louis - AUS Austin Bergstrom
STLAUS
Lambert-St Louis
Tue 10/20
5:35 pm-11:24 pm
1 stop5h 49m
Austin Bergstrom
Wed 12/31
12:00 am-12:00 am
Nonstop0h 00m
$121
St. LouisAustin
STL Lambert-St Louis - AUS Austin Bergstrom
STLAUS
Lambert-St Louis
Sat 10/31
5:00 am-3:21 pm
2 stops10h 21m
Austin Bergstrom
Wed 12/31
12:00 am-12:00 am
Nonstop0h 00m
$131
St. LouisAustin
STL Lambert-St Louis - AUS Austin Bergstrom
STLAUS
Lambert-St Louis
Sat 10/31
10:47 am-6:00 pm
1 stop7h 13m
Austin Bergstrom
Wed 12/31
12:00 am-12:00 am
Nonstop0h 00m
$131
St. LouisAustin
STL Lambert-St Louis - AUS Austin Bergstrom
STLAUS
Lambert-St Louis
Fri 10/30
9:45 pm-11:55 pm
Nonstop2h 10m
Austin Bergstrom
Wed 12/31
12:00 am-12:00 am
Nonstop0h 00m
$135
St. LouisAustin
STL Lambert-St Louis - AUS Austin Bergstrom
STLAUS
Lambert-St Louis
Wed 11/25
12:29 pm-8:30 pm
1 stop8h 01m
Austin Bergstrom
Wed 12/31
12:00 am-12:00 am
Nonstop0h 00m
$140
St. LouisAustin
STL Lambert-St Louis - AUS Austin Bergstrom
STLAUS
Lambert-St Louis
Sat 10/3
10:40 am-4:11 pm
1 stop5h 31m
Austin Bergstrom
Wed 12/31
12:00 am-12:00 am
Nonstop0h 00m
$143
Quickest round-trip
St. LouisAustin
STL Lambert-St Louis - AUS Austin Bergstrom
STLAUS
Lambert-St Louis
Sun 11/1
9:50 pm-11:55 pm
Nonstop2h 05m
Austin Bergstrom
Wed 12/31
12:00 am-12:00 am
Nonstop0h 00m
$150
St. LouisAustin
STL Lambert-St Louis - AUS Austin Bergstrom
STLAUS
Lambert-St Louis
Tue 11/3
8:25 am-3:10 pm
2 stops6h 45m
Austin Bergstrom
Wed 12/31
12:00 am-12:00 am
Nonstop0h 00m
$153
St. LouisAustin
STL Lambert-St Louis - AUS Austin Bergstrom
STLAUS
Lambert-St Louis
Tue 10/20
1:29 pm-10:54 pm
2 stops9h 25m
Austin Bergstrom
Wed 12/31
12:00 am-12:00 am
Nonstop0h 00m
$166
St. LouisAustin
STL Lambert-St Louis - AUS Austin Bergstrom
STLAUS
Lambert-St Louis
Sat 9/26
8:00 am-5:39 pm
2 stops9h 39m
Austin Bergstrom
Wed 12/31
12:00 am-12:00 am
Nonstop0h 00m
$166
Showing 1-10 of 23 resultsSorted by cheapest first
Compare providers for flights from St. Louis to Austin
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 Austin in September.
| Provider | Price Accuracy | Trust Score* |
|---|---|---|
| Price Accuracy1 star | Trust Score*3 stars | |
| Price Accuracy3 stars | Trust Score*3 stars | |
| Price Accuracy1 star | Trust Score*3 stars |
- Most accurate provider: When it comes to deals on St. Louis-Austin flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on St. Louis-Austin flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from St. Louis-Austin flight searches over the past month and is updated monthly.
- Most trusted provider: When it comes to deals on St. Louis-Austin 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-Austin 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 Austin
Have a flexible travel schedule? Discover the best time to fly to Austin from St. Louis with our price prediction graph.
STL-AUS
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 Austin
How far ahead should I book a flight from St. Louis to Austin?
The price you pay for your flight from St. Louis to Austin may vary depending on when you book. For the best chance of a lower fare, look to book 83 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 St. Louis to Austin?
Currently, February is the cheapest month in which you can book a flight from St. Louis to Austin (average of $293). Flying from St. Louis to Austin in March is currently the most expensive (average of $435). 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 STL to AUS?
Find hourly flight availability from St. Louis to Austin. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated September 4, 2026.
When flying from St. Louis to Austin, the time of day you fly usually plays a role in the price. Save by searching for a flight in the evening, which can drop the price by up to 29% versus a flight in the afternoon.
What is the cheapest day to fly from St. Louis to Austin?
Use this chart to determine the cheapest time to fly round-trip from St. Louis to Austin. Price data was last updated on August 29, 2026.
Travelers seeking maximum savings on their St. Louis to Austin flight should consider departing on Wednesday afternoons when fares are most often at their lowest. Sunday mornings flights should be avoided if possible as fares are typically the most expensive at this time.
Reviews of airlines servicing Austin
Get insights into the airlines that provide service to Austin. 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 Austin. Reviews last updated September 4, 2026.
Read reviews from past customers who have flown Southwest,Delta, andUnited Airlines from St. Louis to Austin. Users can see the overall rating for each airline as well as how each is rated in terms of entertainment options, comfort, food, crew/service, and boarding process.
Crew
8.6
Food
7.0
Boarding
8.1
Entertainment
7.5
Overall
8.0
Comfort
8.0
Reviews
1 / 20
2.0
MediocreMike,Aug 2025
OKC - AUS
Crew
8.6
Food
7.0
Boarding
8.1
Entertainment
7.5
Overall
8.0
Comfort
8.0
Reviews
1 / 20
2.0
MediocreMike,Aug 2025
OKC - AUS
Crew
8.6
Food
7.0
Boarding
8.1
Entertainment
7.5
Overall
8.0
Comfort
8.0
Reviews
1 / 20
2.0
MediocreMike,Aug 2025
OKC - AUS
Crew
8.6
Food
7.0
Boarding
8.1
Entertainment
7.5
Overall
8.0
Comfort
8.0
Reviews
1 / 20
2.0
MediocreMike,Aug 2025
OKC - AUS
Crew
8.6
Food
7.0
Boarding
8.1
Entertainment
7.5
Overall
8.0
Comfort
8.0
Reviews
1 / 20
2.0
MediocreMike,Aug 2025
OKC - AUS
Related info for your journey
Find useful and relevant information for your journey from St. Louis to Austin. 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 Austin?
Book flights to Austin if you plan to visit one of these locationsRound Rock
Cedar Park
San Marcos
Bastrop
Fredericksburg
Pflugerville
Dripping Springs
Georgetown
Seguin
Canyon Lake
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Top 4 airlines flying from St. Louis to Austin
Discover the top 4 airlines that operate flights from St. Louis to Austin. 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 September 4, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$196 | Average$288 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$217 | Average$348 | FlexibilityNo cancel fee | On-time63% | |
| Cheapest$235 | Average$350 | FlexibilityNo cancel fee | On-time71% | |
| Cheapest$248 | Average$547 | FlexibilityNo cancel fee | On-timeN/A |