Southwest® flights from St. Louis to Austin from $98

Promo Code

Low fares from St. Louis to Austin

$

St. Louis (STL)to

Austin (AUS)
Depart: 10/15/2026

One-way

Basic

From
$98
Seen: 2 hrs ago

St. Louis (STL)to

Austin (AUS)
Depart: 09/24/2026

One-way

Basic

From
$109
Seen: 18 hrs ago

St. Louis (STL)to

Austin (AUS)
Depart: 09/09/2026

One-way

Basic

From
$109
Seen: 11 hrs ago

St. Louis (STL)to

Austin (AUS)
Depart: 10/12/2026

One-way

Basic

From
$109
Seen: 10 hrs ago

St. Louis (STL)to

Austin (AUS)
Depart: 10/10/2026

One-way

Basic

From
$109
Seen: 16 hrs ago

St. Louis (STL)to

Austin (AUS)
Depart: 10/01/2026

One-way

Basic

From
$109
Seen: 17 hrs ago

Looking for more low-fare flights?

Check out the Low Fare Calendar to find a fare that works for you. Just choose the month you want to depart and return, and we’ll show you the best fares available.

Find low fares

Explore flights from St. Louis to Austin

Jul 2026
From$404*
Seen: 18 hrs ago
One Way/Basic
Aug 2026
From$109*
Seen: 22 hrs ago
One Way/Basic
Sep 2026
From$109*
Seen: 13 hrs ago
One Way/Basic
cmp-daily-histogram-bars-legend-min-price-aria-label $109
cmp-daily-histogram-bars-legend-max-price-aria-label $409
Displaying fares for July-2026
  • STL–AUS, 07/31/2026: From $404
    31

    Fri

    JUL

  • STL–AUS, 08/01/2026: From $404
    01

    Sat

  • STL–AUS, 08/02/2026: From $409
    02

    Sun

  • STL–AUS, 08/03/2026: From $404
    03

    Mon

  • STL–AUS, 08/04/2026: From $409
    04

    Tue

  • STL–AUS: cmp-view-offers-disclaimer. Find Offers
    05

    Wed

  • STL–AUS, 08/06/2026: From $409
    06

    Thu

  • STL–AUS, 08/07/2026: From $285
    07

    Fri

  • STL–AUS: cmp-view-offers-disclaimer. Find Offers
    08

    Sat

  • STL–AUS: cmp-view-offers-disclaimer. Find Offers
    09

    Sun

  • STL–AUS, 08/10/2026: From $285
    10

    Mon

  • STL–AUS, 08/11/2026: From $285
    11

    Tue

  • STL–AUS, 08/12/2026: From $285
    12

    Wed

  • STL–AUS, 08/13/2026: From $285
    13

    Thu

  • STL–AUS, 08/14/2026: From $184
    14

    Fri

  • STL–AUS, 08/15/2026: From $184
    15

    Sat

  • STL–AUS, 08/16/2026: From $184
    16

    Sun

  • STL–AUS, 08/17/2026: From $184
    17

    Mon

  • STL–AUS, 08/18/2026: From $184
    18

    Tue

  • STL–AUS, 08/19/2026: From $184
    19

    Wed

  • STL–AUS, 08/20/2026: From $184
    20

    Thu

  • STL–AUS, 08/21/2026: From $130
    21

    Fri

  • STL–AUS, 08/22/2026: From $119
    22

    Sat

  • STL–AUS, 08/23/2026: From $164
    23

    Sun

  • STL–AUS, 08/24/2026: From $109
    24

    Mon

  • STL–AUS, 08/25/2026: From $119
    25

    Tue

  • STL–AUS, 08/26/2026: From $119
    26

    Wed

  • STL–AUS, 08/27/2026: From $119
    27

    Thu

  • STL–AUS, 08/28/2026: From $130
    28

    Fri

  • STL–AUS, 08/29/2026: From $119
    29

    Sat

  • STL–AUS: cmp-view-offers-disclaimer. Find Offers
    30

    Sun

    • Range$109-$409

    *Fares displayed have been collected within the last 24 hours and may no longer be available at time of booking. Additional fees and charges for optional products and services may apply. Modifying this information may result in a different fare. To find the most updated fare, please visit Southwest.com. Fares listed are Basic, which are subject to additional terms and conditions.

    Flight Details

    Departing from:
    Lambert-St Louis Int'l Airport
    Arriving at:
    Austin-Bergstrom International Airport
    Average flight time:
    2 hours 4 minutes
    Distance:
    721 miles

    Route Information

    156† Weekly flights
    • 2‡ Nonstop flights per day Monday through Friday
    • 1‡ Nonstop flight on Saturday
    • 3‡ Nonstop flights on Sunday

    † Weekly flights based on DOT published scheduled average flights Monday through Sunday between 9/1/2025 and 9/30/2025. Note: route may not operate every day of the week.

    ‡ Nonstop flights based on DOT published scheduled average flights Monday through Sunday between 9/1/2025 and 9/30/2025.

    Questions we hear the most

    The average flight time from St. Louis to Austin is 2 hours 4 minutes.
    There are 156 weekly flights from St. Louis to Austin on Southwest Airlines.
    Yes, Southwest flies nonstop from St. Louis to Austin 2 times per day from Monday through Friday.
    Yes, Southwest flies nonstop from St. Louis to Austin once per day on Saturdays and 3 times per day on Sundays.
    To find the lowest fares by day and time to fly St. Louis to Austin with Southwest, check out our Low Fare Calendar.
    You can rent a car at Austin-Bergstrom International Airport book yours with your flight.
    Yes! Flights from St. Louis to Austin—or from here or there to anywhere—can be changed with no change fees. Fare difference may apply.
    Check the status of your upcoming Southwest flight.
    Check out the Southwest Airlines® Help Center for answers about everything Southwest.

    Explore Flights from Other Popular Origins

    Popular Flights from St. Louis