$71+ Cheap flights from St. Louis to Austin (STL - AUS)
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 4/6. Fares are subject to change and may not be available on all flights or dates of travel.
STL — AUS
Apr 9 — Apr 161
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 September or August, booked 86 days in advance, depart on a Tuesday or Thursday and return on a Tuesday
Cheap flight deals from St. Louis to Austin
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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 March 10, 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 March 10, 2026.
This Orbitz deal was found by Cheapflights users on 3/6. 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 Orbitz is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 5/78:12 pm
STL
- AUS
1 stop13h 53m
Frontier
Sun 5/1011:01 am
AUS
- STL
1 stop8h 11m
Frontier
Deal found 3/6![Frontier logo]()
$160
This Kiwi.com deal was found by Cheapflights users on 3/5. 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 5/28:17 pm
STL
- AUS
1 stop24h 39m
Frontier
Sat 5/97:30 am
AUS
- STL
1 stop11h 42m
Frontier
Deal found 3/5![Frontier logo]()
$161
This Kiwi.com deal was found by Cheapflights users on 3/5. 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 5/48:17 pm
STL
- AUS
1 stop28h 04m
Frontier
Fri 5/811:01 am
AUS
- STL
1 stop8h 11m
Frontier
Deal found 3/5![Frontier logo]()
$174
This American Airlines deal was found by Cheapflights users on 3/7. 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 4/45:12 am
STL
- AUS
1 stop4h 22m
American Airlines
Sat 4/1112:43 pm
AUS
- STL
1 stop4h 38m
American Airlines
Deal found 3/7![American Airlines logo]()
$175
This Kiwi.com deal was found by Cheapflights users on 3/9. 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 4/88:16 pm
STL
- AUS
1 stop13h 49m
Frontier
Wed 4/156:13 pm
AUS
- STL
1 stop25h 08m
Frontier
Deal found 3/9![Frontier logo]()
$181
This Kiwi.com deal was found by Cheapflights users on 3/6. 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 4/38:16 pm
STL
- AUS
1 stop28h 05m
Frontier
Fri 4/1011:00 am
AUS
- STL
1 stop22h 48m
Frontier
Deal found 3/6![Frontier logo]()
$184
This Kiwi.com deal was found by Cheapflights users on 3/8. 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 4/118:16 pm
STL
- AUS
1 stop28h 05m
Frontier
Wed 4/156:13 pm
AUS
- STL
1 stop25h 08m
Frontier
Deal found 3/8![Frontier logo]()
$185
This Kiwi.com deal was found by Cheapflights users on 3/7. 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 3/288:12 pm
STL
- AUS
1 stop13h 54m
Frontier
Tue 4/77:00 am
AUS
- STL
1 stop26h 48m
Frontier
Deal found 3/7![Frontier logo]()
$186
This Kiwi.com deal was found by Cheapflights users on 3/9. 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 4/178:06 pm
STL
- AUS
1 stop23h 49m
Frontier
Mon 4/2011:01 am
AUS
- STL
1 stop8h 31m
Frontier
Deal found 3/9![Frontier logo]()
$188
This Southwest deal was found by Cheapflights users on 3/9. 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 4/78:55 pm
STL
- AUS
Nonstop2h 10m
Southwest
Tue 4/1412:25 pm
AUS
- STL
Nonstop2h 05m
Southwest
Deal found 3/9![Southwest logo]()
$189
This Southwest deal was found by Cheapflights users on 3/8. 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 5/165:40 am
STL
- AUS
1 stop7h 10m
Southwest
Mon 5/187:30 am
AUS
- STL
Nonstop2h 05m
Southwest
Deal found 3/8![Southwest logo]()
$192
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 March 10, 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 March 10, 2026.
This Southwest deal was found by Cheapflights users on 3/9. 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 4/158:25 am
STL
- AUS
Nonstop2h 10m
Southwest
Sat 4/1811:05 am
AUS
- STL
1 stop4h 15m
Southwest
Deal found 3/9![Southwest logo]()
$205
This Delta deal was found by Cheapflights users on 3/6. 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 4/96:32 am
STL
- AUS
1 stop8h 17m
Delta
Mon 4/133:34 pm
AUS
- STL
1 stop5h 45m
Delta
Deal found 3/6![Delta logo]()
$219
This United Airlines deal was found by Cheapflights users on 3/5. 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 4/1111:15 am
STL
- AUS
2 stops8h 44m
United Airlines
Mon 4/135:56 pm
AUS
- STL
1 stop4h 32m
United Airlines
Deal found 3/5![United Airlines logo]()
$234
This Southwest deal was found by Cheapflights users on 3/5. 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 4/112:35 pm
STL
- AUS
1 stop7h 10m
Southwest
Mon 4/137:30 am
AUS
- STL
Nonstop2h 05m
Southwest
Deal found 3/5![Southwest logo]()
$219
This Delta deal was found by Cheapflights users on 3/8. 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 4/2411:42 am
STL
- AUS
1 stop8h 04m
Delta
Mon 4/275:25 am
AUS
- STL
1 stop5h 09m
Delta
Deal found 3/8![Delta logo]()
$249
This United Airlines deal was found by Cheapflights users on 3/9. 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 6/85:10 am
STL
- AUS
1 stop6h 05m
United Airlines
Fri 6/196:29 pm
AUS
- STL
1 stop5h 28m
United Airlines
Deal found 3/9![United Airlines logo]()
$254
This Southwest deal was found by Cheapflights users on 3/8. 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 4/243:00 pm
STL
- AUS
1 stop5h 45m
Southwest
Mon 4/277:55 pm
AUS
- STL
1 stop4h 20m
Southwest
Deal found 3/8![Southwest logo]()
$239
This Southwest deal was found by Cheapflights users on 3/9. 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 4/179:40 pm
STL
- AUS
Nonstop2h 10m
Southwest
Mon 4/207:55 pm
AUS
- STL
1 stop4h 20m
Southwest
Deal found 3/9![Southwest logo]()
$239
This Southwest deal was found by Cheapflights users on 3/6. 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 4/95:40 am
STL
- AUS
2 stops6h 15m
Southwest
Mon 4/134:30 pm
AUS
- STL
1 stop6h 10m
Southwest
Deal found 3/6![Southwest logo]()
$254
This Southwest deal was found by Cheapflights users on 3/9. 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 6/89:55 pm
STL
- AUS
Nonstop2h 00m
Southwest
Fri 6/197:05 pm
AUS
- STL
1 stop5h 30m
Southwest
Deal found 3/9![Southwest logo]()
$261
This Southwest deal was found by Cheapflights users on 3/6. 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 3/265:45 am
STL
- AUS
1 stop4h 25m
Southwest
Sat 3/287:30 am
AUS
- STL
Nonstop2h 00m
Southwest
Deal found 3/6![Southwest logo]()
$273
Last-minute flights from St. Louis to AustinDiscover last-minute flight deals from St. Louis to Austin. Data last updated March 10, 2026 and is based on user searches.
Discover last-minute flight deals from St. Louis to Austin. Data last updated March 10, 2026 and is based on user searches.
This Kiwi.com deal was found by Cheapflights users on 3/7. 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 3/288:12 pm
STL
- AUS
1 stop13h 54m
Frontier
Fri 4/311:00 am
AUS
- STL
1 stop22h 48m
Frontier
Deal found 3/7![Frontier logo]()
$186
This Kiwi.com deal was found by Cheapflights users on 3/6. 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 4/38:16 pm
STL
- AUS
1 stop28h 05m
Frontier
Fri 4/1011:00 am
AUS
- STL
1 stop22h 48m
Frontier
Deal found 3/6![Frontier logo]()
$184
This American Airlines deal was found by Cheapflights users on 3/7. 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 4/45:12 am
STL
- AUS
1 stop4h 22m
American Airlines
Sat 4/1112:43 pm
AUS
- STL
1 stop4h 38m
American Airlines
Deal found 3/7![American Airlines logo]()
$175
This Kiwi.com deal was found by Cheapflights users on 3/9. 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 4/48:16 pm
STL
- AUS
1 stop13h 49m
Frontier
Tue 4/77:00 am
AUS
- STL
1 stop26h 48m
Frontier
Deal found 3/9![Frontier logo]()
$197
This Southwest deal was found by Cheapflights users on 3/9. 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 4/78:55 pm
STL
- AUS
Nonstop2h 10m
Southwest
Tue 4/1412:25 pm
AUS
- STL
Nonstop2h 05m
Southwest
Deal found 3/9![Southwest logo]()
$189
This Kiwi.com deal was found by Cheapflights users on 3/9. 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 4/88:16 pm
STL
- AUS
1 stop13h 49m
Frontier
Wed 4/156:13 pm
AUS
- STL
1 stop25h 08m
Frontier
Deal found 3/9![Frontier logo]()
$181
This Kiwi.com deal was found by Cheapflights users on 3/8. 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 4/118:16 pm
STL
- AUS
1 stop28h 05m
Frontier
Wed 4/156:13 pm
AUS
- STL
1 stop25h 08m
Frontier
Deal found 3/8![Frontier logo]()
$185
This Southwest deal was found by Cheapflights users on 3/8. 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 4/115:15 am
STL
- AUS
1 stop6h 20m
Southwest
Wed 4/153:50 pm
AUS
- STL
Nonstop2h 10m
Southwest
Deal found 3/8![Southwest logo]()
$192
This Kiwi.com deal was found by Cheapflights users on 3/5. 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 4/138:19 pm
STL
- AUS
1 stop20h 59m
Frontier
Fri 4/249:47 pm
AUS
- STL
1 stop21h 45m
Frontier
Deal found 3/5![Frontier logo]()
$196
This Kiwi.com deal was found by Cheapflights users on 3/9. 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 4/178:06 pm
STL
- AUS
1 stop23h 49m
Frontier
Mon 4/2011:01 am
AUS
- STL
1 stop8h 31m
Frontier
Deal found 3/9![Frontier logo]()
$188
This Expedia deal was found by Cheapflights users on 3/5. 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.
Sun 4/199:55 pm
STL
- AUS
1 stop14h 52m
Frontier
Fri 4/249:47 pm
AUS
- STL
1 stop21h 45m
Frontier
Deal found 3/5![Frontier logo]()
$160
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 March 10, 2026.
Search for one-way flight options from St. Louis to Austin. Find affordable one-way fares based on user searches. Data last updated March 10, 2026.
This Kiwi.com deal was found by Cheapflights users on 3/6. 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 4/68:19 pm
STL
- AUS
1 stop28h 02m
Frontier
Deal found 3/6![Frontier logo]()
$71
This Kiwi.com deal was found by Cheapflights users on 3/6. 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 4/711:21 am
STL
- AUS
1 stop27h 51m
Frontier
Deal found 3/6![Frontier logo]()
$72
This Kiwi.com deal was found by Cheapflights users on 3/5. 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 4/18:16 pm
STL
- AUS
1 stop28h 05m
Frontier
Deal found 3/5![Frontier logo]()
$77
This Kiwi.com deal was found by Cheapflights users on 3/6. 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 4/38:16 pm
STL
- AUS
1 stop28h 05m
Frontier
Deal found 3/6![Frontier logo]()
$78
This Frontier deal was found by Cheapflights users on 3/5. 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 5/711:21 am
STL
- AUS
1 stop5h 24m
Frontier
Deal found 3/5![Frontier logo]()
$80
This Frontier deal was found by Cheapflights users on 3/6. 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.
Sun 4/269:55 pm
STL
- AUS
1 stop14h 20m
Frontier
Deal found 3/6![Frontier logo]()
$86
This Kiwi.com deal was found by Cheapflights users on 3/10. 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 5/98:12 pm
STL
- AUS
1 stop13h 53m
Frontier
Deal found 3/10![Frontier logo]()
$88
This Kiwi.com deal was found by Cheapflights users on 3/6. 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 4/278:17 pm
STL
- AUS
1 stop21h 01m
Frontier
Deal found 3/6![Frontier logo]()
$90
This Kiwi.com deal was found by Cheapflights users on 3/5. 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 5/48:17 pm
STL
- AUS
1 stop28h 04m
Frontier
Deal found 3/5![Frontier logo]()
$93
This Southwest deal was found by Cheapflights users on 3/8. 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 4/88:25 am
STL
- AUS
Nonstop2h 10m
Southwest
Deal found 3/8![Southwest logo]()
$95
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 March 10, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $160 (Orbitz) |
One-way from | $71 (Kiwi.com) |
Popular in | March |
Cheapest in | September |
Average price | $396 |
Good round-trip deal | $309 or less |
Good one-way deal | $168 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 2,558,603 searches. Data last updated March 10, 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
Quickest round-trip
St. LouisAustin
STL - AUS
STLAUS
Lambert-St Louis
Wed 4/15
8:25 am-10:35 am
Nonstop2h 10m
Austin Bergstrom
Sat 4/18
11:05 am-3:20 pm
1 stop4h 15m
$205
St. LouisAustin
STL - AUS
STLAUS
Lambert-St Louis
Thu 4/9
6:32 am-2:49 pm
1 stop8h 17m
Austin Bergstrom
Mon 4/13
3:34 pm-9:19 pm
1 stop5h 45m
$219
St. LouisAustin
STL - AUS
STLAUS
Lambert-St Louis
Sat 4/11
2:35 pm-9:45 pm
1 stop7h 10m
Austin Bergstrom
Mon 4/13
7:30 am-9:35 am
Nonstop2h 05m
$219
St. LouisAustin
STL - AUS
STLAUS
Lambert-St Louis
Sat 4/11
11:15 am-7:59 pm
2 stops8h 44m
Austin Bergstrom
Mon 4/13
5:56 pm-10:28 pm
1 stop4h 32m
$234
St. LouisAustin
STL - AUS
STLAUS
Lambert-St Louis
Fri 4/24
3:00 pm-8:45 pm
1 stop5h 45m
Austin Bergstrom
Mon 4/27
7:55 pm-12:15 am
1 stop4h 20m
$239
St. LouisAustin
STL - AUS
STLAUS
Lambert-St Louis
Fri 4/17
9:40 pm-11:50 pm
Nonstop2h 10m
Austin Bergstrom
Mon 4/20
7:55 pm-12:15 am
1 stop4h 20m
$239
St. LouisAustin
STL - AUS
STLAUS
Lambert-St Louis
Fri 4/24
11:42 am-7:46 pm
1 stop8h 04m
Austin Bergstrom
Mon 4/27
5:25 am-10:34 am
1 stop5h 09m
$249
St. LouisAustin
STL - AUS
STLAUS
Lambert-St Louis
Mon 6/8
5:10 am-11:15 am
1 stop6h 05m
Austin Bergstrom
Fri 6/19
6:29 pm-11:57 pm
1 stop5h 28m
$254
St. LouisAustin
STL - AUS
STLAUS
Lambert-St Louis
Thu 4/9
5:40 am-11:55 am
2 stops6h 15m
Austin Bergstrom
Mon 4/13
4:30 pm-10:40 pm
1 stop6h 10m
$254
St. LouisAustin
STL - AUS
STLAUS
Lambert-St Louis
Mon 6/8
9:55 pm-11:55 pm
Nonstop2h 00m
Austin Bergstrom
Fri 6/19
7:05 pm-12:35 am
1 stop5h 30m
$261
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 March.
| 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-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?
Use this chart to determine the optimal time to book a round-trip flight from St. Louis to Austin. Price data was last updated on March 6, 2026.
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 85 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, May is the cheapest month in which you can book a flight from St. Louis to Austin (average of $118). Flying from St. Louis to Austin in March is currently the most expensive (average of $223). 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 March 10, 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 23% versus a flight in the afternoon.
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 March 10, 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
Comfort
8.0
Boarding
8.1
Overall
8.0
Entertainment
7.5
Reviews
1 / 20
2.0
MediocreMike,Aug 2025
OKC - AUS
Crew
8.6
Food
7.0
Comfort
8.0
Boarding
8.1
Overall
8.0
Entertainment
7.5
Reviews
1 / 20
2.0
MediocreMike,Aug 2025
OKC - AUS
Crew
8.6
Food
7.0
Comfort
8.0
Boarding
8.1
Overall
8.0
Entertainment
7.5
Reviews
1 / 20
2.0
MediocreMike,Aug 2025
OKC - AUS
Crew
8.6
Food
7.0
Comfort
8.0
Boarding
8.1
Overall
8.0
Entertainment
7.5
Reviews
1 / 20
2.0
MediocreMike,Aug 2025
OKC - AUS
Crew
8.6
Food
7.0
Comfort
8.0
Boarding
8.1
Overall
8.0
Entertainment
7.5
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
San Marcos
Fredericksburg
Round Rock
Georgetown
Bastrop
Pflugerville
Dripping Springs
Canyon Lake
Seguin
Horseshoe Bay
Browse thousands of different options on Cheapflights for your next trip
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Other flights to Austin
Explore flights to Austin departing from other origins. Flights are based on user searches made on Cheapflights and were last updated on March 10, 2026.
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St. Louis and Austin flights
Browse other St. Louis and Austin flight options. Last updated on March 10, 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 March 10, 2026.
Popular flight searches
Check out other popular destinations found by fellow travelers in 2026
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 2,558,603 searches. Data last updated March 10, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$145 | Average$268 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$167 | Average$306 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$176 | Average$308 | FlexibilityNo cancel fee | On-time71% | |
| Cheapest$198 | Average$322 | FlexibilityNo cancel fee | On-time63% |