$75+ 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 12/14. Fares are subject to change and may not be available on all flights or dates of travel.
STL — AUS
Nov 18 — Nov 251
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 June, booked 55 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 October 19, 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 October 19, 2026.
This Kiwi.com deal was found by Cheapflights users on 10/14. 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 11/66:34 pm -
1 stop18h 26m
Tue 11/1012:24 pm -
1 stop29h 18m
Deal found 10/14![Frontier logo]()
$143
This Kiwi.com deal was found by Cheapflights users on 10/17. 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 12/412:02 pm -
1 stop22h 12m
Tue 12/811:32 am -
1 stop23h 45m
Deal found 10/17![Frontier logo]()
$146
This Kiwi.com deal was found by Cheapflights users on 10/14. 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 11/116:34 pm -
1 stop19h 20m
Wed 11/1812:24 pm -
1 stop5h 18m
Deal found 10/14![Frontier logo]()
$149
This Travelocity deal was found by Cheapflights users on 10/14. 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 Travelocity is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 11/213:04 pm -
1 stop28h 05m
Mon 11/2312:00 pm -
1 stop5h 40m
Deal found 10/14![Frontier logo]()
$174
This Expedia deal was found by Cheapflights users on 10/14. 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.
Sat 11/216:05 pm -
1 stop26h 12m
Fri 11/278:15 am -
1 stop9h 25m
Deal found 10/14![Frontier logo]()
$182
This Travelocity deal was found by Cheapflights users on 10/14. 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 Travelocity is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 11/206:05 pm -
1 stop26h 09m
Mon 11/2312:00 pm -
1 stop5h 40m
Deal found 10/14![Frontier logo]()
$203
This Kiwi.com deal was found by Cheapflights users on 10/15. 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 12/412:02 pm -
1 stop22h 12m
Mon 12/711:10 am -
2 stops13h 02m
Deal found 10/15![Frontier logo]()
$206
This Southwest deal was found by Cheapflights users on 10/19. 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 12/18:25 pm -
Nonstop2h 10m
Sat 12/52:15 pm -
Nonstop2h 05m
Deal found 10/19![Southwest logo]()
$210
This Southwest deal was found by Cheapflights users on 10/18. 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.
Thu 11/129:50 pm -
Nonstop2h 05m
Mon 11/167:30 am -
Nonstop2h 05m
Deal found 10/18![Southwest logo]()
$216
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 October 19, 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 October 19, 2026.
This Southwest deal was found by Cheapflights users on 10/18. 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.
Thu 11/128:25 am -
1 stop5h 25m
Mon 11/167:30 am -
Nonstop2h 05m
Deal found 10/18![Southwest logo]()
$220
This United Airlines deal was found by Cheapflights users on 10/14. 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 11/56:15 am -
1 stop4h 58m
Mon 11/97:00 am -
1 stop5h 10m
Deal found 10/14![United Airlines logo]()
$241
This Delta deal was found by Cheapflights users on 10/15. 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.
Thu 1/711:51 am -
1 stop5h 30m
Sun 1/105:40 am -
1 stop5h 08m
Deal found 10/15![Delta logo]()
$313
This Southwest deal was found by Cheapflights users on 10/14. 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 12/41:55 pm -
Nonstop2h 05m
Sun 12/68:00 am -
1 stop4h 45m
Deal found 10/14![Southwest logo]()
$270
This United Airlines deal was found by Cheapflights users on 10/17. 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 12/216:09 pm -
1 stop5h 35m
Sat 12/266:35 am -
1 stop5h 51m
Deal found 10/17![United Airlines logo]()
$339
This Southwest deal was found by Cheapflights users on 10/14. 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 11/55:40 am -
1 stop6h 10m
Sun 11/87:35 am -
Nonstop2h 00m
Deal found 10/14![Southwest logo]()
$309
This Delta deal was found by Cheapflights users on 10/16. 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 12/237:15 pm -
1 stop5h 21m
Sun 12/276:43 pm -
1 stop5h 12m
Deal found 10/16![Delta logo]()
$373
This Southwest deal was found by Cheapflights users on 10/16. 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 11/132:45 pm -
Nonstop2h 05m
Sun 11/155:40 am -
1 stop3h 45m
Deal found 10/16![Southwest logo]()
$313
This Southwest deal was found by Cheapflights users on 10/17. 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 12/154:30 pm -
1 stop4h 35m
Thu 12/173:30 pm -
2 stops6h 05m
Deal found 10/17![Southwest logo]()
$334
This Southwest deal was found by Cheapflights users on 10/15. 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.
Sat 11/148:40 am -
Nonstop2h 10m
Fri 11/207:35 am -
Nonstop2h 00m
Deal found 10/15![Southwest logo]()
$362
Last-minute flights from St. Louis to AustinDiscover last-minute flight deals from St. Louis to Austin. Data last updated October 19, 2026 and is based on user searches.
Discover last-minute flight deals from St. Louis to Austin. Data last updated October 19, 2026 and is based on user searches.
This Kiwi.com deal was found by Cheapflights users on 10/14. 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 11/66:34 pm -
1 stop18h 26m
Tue 11/1012:24 pm -
1 stop29h 18m
Deal found 10/14![Frontier logo]()
$143
This Trip.com deal was found by Cheapflights users on 10/16. 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.
Fri 11/67:59 pm -
1 stop23h 27m
Sun 11/81:08 pm -
1 stop23h 25m
Deal found 10/16![Frontier logo]()
$224
This Southwest deal was found by Cheapflights users on 10/14. 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 11/69:50 pm -
Nonstop2h 05m
Tue 11/1012:15 pm -
Nonstop2h 05m
Deal found 10/14![Southwest logo]()
$231
This Kiwi.com deal was found by Cheapflights users on 10/14. 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 11/116:34 pm -
1 stop19h 20m
Wed 11/1812:24 pm -
1 stop5h 18m
Deal found 10/14![Frontier logo]()
$149
This Southwest deal was found by Cheapflights users on 10/18. 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.
Thu 11/129:50 pm -
Nonstop2h 05m
Mon 11/167:30 am -
Nonstop2h 05m
Deal found 10/18![Southwest logo]()
$216
This Super.com deal was found by Cheapflights users on 10/14. 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 11/1911:40 am -
1 stop7h 46m
Thu 11/264:40 pm -
1 stop7h 19m
Deal found 10/14![Frontier logo]()
$223
This Travelocity deal was found by Cheapflights users on 10/14. 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 Travelocity is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 11/206:05 pm -
1 stop26h 09m
Mon 11/2312:00 pm -
1 stop5h 40m
Deal found 10/14![Frontier logo]()
$203
This Travelocity deal was found by Cheapflights users on 10/14. 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 Travelocity is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 11/213:04 pm -
1 stop28h 05m
Mon 11/2312:00 pm -
1 stop5h 40m
Deal found 10/14![Frontier logo]()
$174
This Expedia deal was found by Cheapflights users on 10/14. 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.
Sat 11/216:05 pm -
1 stop26h 12m
Fri 11/278:15 am -
1 stop9h 25m
Deal found 10/14![Frontier logo]()
$182
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 October 19, 2026.
Search for one-way flight options from St. Louis to Austin. Find affordable one-way fares based on user searches. Data last updated October 19, 2026.
This Kiwi.com deal was found by Cheapflights users on 10/14. 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 12/1412:02 pm -
1 stop22h 12m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/14![Frontier logo]()
$75
This Priceline deal was found by Cheapflights users on 10/14. 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.
Wed 12/232:59 pm -
1 stop9h 04m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/14![Frontier logo]()
$78
This Kiwi.com deal was found by Cheapflights users on 10/14. 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 11/66:34 pm -
1 stop18h 26m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/14![Frontier logo]()
$90
This Kiwi.com deal was found by Cheapflights users on 10/14. 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 12/117:54 pm -
1 stop21h 39m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/14![Frontier logo]()
$97
This Kiwi.com deal was found by Cheapflights users on 10/14. 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 12/167:54 pm -
1 stop23h 24m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/14![Frontier logo]()
$104
This CheapOair deal was found by Cheapflights users on 10/15. 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 12/225:37 pm -
1 stop26h 05m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/15![Frontier logo]()
$107
This Super.com deal was found by Cheapflights users on 10/15. 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.
Sat 11/211:20 pm -
1 stop6h 54m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/15![Frontier logo]()
$109
This Southwest deal was found by Cheapflights users on 10/14. 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 11/69:50 pm -
Nonstop2h 05m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/14![Southwest logo]()
$116
This CheapOair deal was found by Cheapflights users on 10/17. 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 11/246:05 pm -
1 stop26h 09m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/17![Frontier logo]()
$117
This Delta deal was found by Cheapflights users on 10/15. 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 11/146:00 am -
1 stop7h 53m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/15![Delta logo]()
$121
This Kiwi.com deal was found by Cheapflights users on 10/15. 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.
Sat 11/147:59 pm -
2 stops39h 40m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/15![Frontier logo]()
$125
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 October 19, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $143 (Kiwi.com) |
One-way from | $75 (Kiwi.com) |
Popular in | March |
Cheapest in | February |
Average price | $367 |
Good round-trip deal | $319 or less |
Good one-way deal | $343 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 October 19, 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
Sat 11/21
1:20 pm-8:14 pm
1 stop6h 54m
Austin Bergstrom
Wed 12/31
12:00 am-12:00 am
Nonstop0h 00m
$109
St. LouisAustin
STL Lambert-St Louis - AUS Austin Bergstrom
STLAUS
Lambert-St Louis
Sat 12/12
12:36 pm-6:35 pm
1 stop5h 59m
Austin Bergstrom
Wed 12/31
12:00 am-12:00 am
Nonstop0h 00m
$121
Quickest round-trip
St. LouisAustin
STL Lambert-St Louis - AUS Austin Bergstrom
STLAUS
Lambert-St Louis
Sat 11/21
9:50 pm-11:55 pm
Nonstop2h 05m
Austin Bergstrom
Wed 12/31
12:00 am-12:00 am
Nonstop0h 00m
$139
St. LouisAustin
STL Lambert-St Louis - AUS Austin Bergstrom
STLAUS
Lambert-St Louis
Tue 12/22
7:15 pm-12:36 am
1 stop5h 21m
Austin Bergstrom
Wed 12/31
12:00 am-12:00 am
Nonstop0h 00m
$149
St. LouisAustin
STL Lambert-St Louis - AUS Austin Bergstrom
STLAUS
Lambert-St Louis
Sat 11/14
6:00 am-1:53 pm
1 stop7h 53m
Austin Bergstrom
Wed 12/31
12:00 am-12:00 am
Nonstop0h 00m
$154
St. LouisAustin
STL Lambert-St Louis - AUS Austin Bergstrom
STLAUS
Lambert-St Louis
Thu 11/5
8:30 am-1:17 pm
1 stop4h 47m
Austin Bergstrom
Wed 12/31
12:00 am-12:00 am
Nonstop0h 00m
$159
St. LouisAustin
STL Lambert-St Louis - AUS Austin Bergstrom
STLAUS
Lambert-St Louis
Sat 11/14
5:00 am-3:21 pm
2 stops10h 21m
Austin Bergstrom
Wed 12/31
12:00 am-12:00 am
Nonstop0h 00m
$159
St. LouisAustin
STL Lambert-St Louis - AUS Austin Bergstrom
STLAUS
Lambert-St Louis
Tue 11/24
6:00 am-10:54 am
1 stop4h 54m
Austin Bergstrom
Wed 12/31
12:00 am-12:00 am
Nonstop0h 00m
$160
St. LouisAustin
STL Lambert-St Louis - AUS Austin Bergstrom
STLAUS
Lambert-St Louis
Mon 12/14
8:25 am-3:10 pm
2 stops6h 45m
Austin Bergstrom
Wed 12/31
12:00 am-12:00 am
Nonstop0h 00m
$160
St. LouisAustin
STL Lambert-St Louis - AUS Austin Bergstrom
STLAUS
Lambert-St Louis
Thu 12/17
5:20 am-1:08 pm
2 stops7h 48m
Austin Bergstrom
Wed 12/31
12:00 am-12:00 am
Nonstop0h 00m
$176
Showing 1-10 of 21 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 October.
| 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 54 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 $432). 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 October 19, 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 30% 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 October 17, 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 October 19, 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.
Comfort
8.0
Boarding
8.1
Entertainment
7.4
Crew
8.6
Overall
7.9
Food
7.0
Reviews
1 / 20
2.0
MediocreMike,Aug 2025
OKC - AUS
Comfort
8.0
Boarding
8.1
Entertainment
7.4
Crew
8.6
Overall
7.9
Food
7.0
Reviews
1 / 20
2.0
MediocreMike,Aug 2025
OKC - AUS
Comfort
8.0
Boarding
8.1
Entertainment
7.4
Crew
8.6
Overall
7.9
Food
7.0
Reviews
1 / 20
2.0
MediocreMike,Aug 2025
OKC - AUS
Comfort
8.0
Boarding
8.1
Entertainment
7.4
Crew
8.6
Overall
7.9
Food
7.0
Reviews
1 / 20
2.0
MediocreMike,Aug 2025
OKC - AUS
Comfort
8.0
Boarding
8.1
Entertainment
7.4
Crew
8.6
Overall
7.9
Food
7.0
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 locationsCedar Park
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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 October 19, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$196 | Average$262 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$221 | Average$356 | FlexibilityNo cancel fee | On-time63% | |
| Cheapest$235 | Average$350 | FlexibilityNo cancel fee | On-time71% | |
| Cheapest$248 | Average$547 | FlexibilityNo cancel fee | On-timeN/A |