Flights to Northwest Austin from St. Louis - $79

View $79 flight on Mon, Sep 15, 2025Opens in a new window

Popular airlines from St. Louis to Northwest Austin

  • American Airlines

    American Airlines

  • Southwest Airlines

    Southwest Airlines

  • Delta

    Delta

  • United

    United

  • Spirit Airlines

    Spirit Airlines

  • Frontier Airlines

    Frontier Airlines

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Cheap Flights from St. Louis to Northwest Austin (STL-AUS)

Prices were available within the past 7 days and start at $79 for one-way flights and $157 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Southwest Airlines
Tue, Aug 19 - Thu, Aug 28
STL
St. Louis
AUS
Austin
$157 Roundtrip, found 2 hours ago
$157
Roundtrip
found 2 hours ago
Select Southwest Airlines flight, departing Tue, Aug 19 from St. Louis to Austin, returning Thu, Aug 28, priced at $157 found 2 hours ago
Southwest Airlines
Tue, Aug 19 - Thu, Aug 28
STL
St. Louis
AUS
Austin
$167 Roundtrip, found 2 hours ago
$167
Roundtrip
found 2 hours ago
Select Southwest Airlines flight, departing Tue, Aug 19 from St. Louis to Austin, returning Thu, Aug 28, priced at $167 found 2 hours ago
American Airlines
Wed, Aug 27 - Tue, Sep 2
STL
St. Louis
AUS
Austin
$168 Roundtrip, found 10 hours ago
$168
Roundtrip
found 10 hours ago
Select American Airlines flight, departing Wed, Aug 27 from St. Louis to Austin, returning Tue, Sep 2, priced at $168 found 10 hours ago
Spirit Airlines
Tue, Oct 28 - Sat, Nov 1
STL
St. Louis
AUS
Austin
$171 Roundtrip, found 1 day ago
$171
Roundtrip
found 1 day ago
Select Spirit Airlines flight, departing Tue, Oct 28 from St. Louis to Austin, returning Sat, Nov 1, priced at $171 found 1 day ago
Delta
Tue, Aug 19 - Thu, Aug 28
STL
St. Louis
AUS
Austin
$172 Roundtrip, found 2 hours ago
$172
Roundtrip
found 2 hours ago
Select Delta flight, departing Tue, Aug 19 from St. Louis to Austin, returning Thu, Aug 28, priced at $172 found 2 hours ago
United
Tue, Aug 19 - Thu, Aug 28
STL
St. Louis
AUS
Austin
$174 Roundtrip, found 2 hours ago
$174
Roundtrip
found 2 hours ago
Select United flight, departing Tue, Aug 19 from St. Louis to Austin, returning Thu, Aug 28, priced at $174 found 2 hours ago

Find the cheapest month to fly from St. Louis (STL) to Austin (AUS)

April is typically the cheapest month to fly

From $158 - $428 per traveler.

Graph displaying average flight prices per month

Alternative airports

Prices were available within the past 7 days. Prices and availability are subject to change.

Select flight to Austin-Bergstrom Intl. AUS. Cheapest option available. Flights from $236
AUS
Austin-Bergstrom Intl.
Cheapest
Flights from $236

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