Southwest® flights from St. Louis to Austin from $109

Promo Code

Low fares from St. Louis to Austin

$

St. Louis (STL)to

Austin (AUS)
Depart: 11/14/2026

One-way

Basic

From
$109
Seen: 21 hrs ago

St. Louis (STL)to

Austin (AUS)
Depart: 10/31/2026

One-way

Basic

From
$109
Seen: 20 hrs ago

St. Louis (STL)to

Austin (AUS)
Depart: 10/27/2026

One-way

Basic

From
$109
Seen: 7 hrs ago

St. Louis (STL)to

Austin (AUS)
Depart: 10/12/2026

One-way

Basic

From
$109
Seen: 6 hrs ago

St. Louis (STL)to

Austin (AUS)
Depart: 10/01/2026

One-way

Basic

From
$109
Seen: 8 hrs ago

St. Louis (STL)to

Austin (AUS)
Depart: 09/19/2026

One-way

Basic

From
$109
Seen: 11 hrs ago

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Explore flights from St. Louis to Austin

Aug 2026
From$280*
Seen: 10 hrs ago
One Way/Basic
Sep 2026
From$109*
Seen: 18 hrs ago
One Way/Basic
Oct 2026
From$109*
Seen: 23 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 August-2026
  • STL–AUS, 08/21/2026: From $409
    21

    Fri

    AUG

  • STL–AUS: cmp-view-offers-disclaimer. Find Offers
    22

    Sat

  • STL–AUS, 08/23/2026: From $404
    23

    Sun

  • STL–AUS, 08/24/2026: From $409
    24

    Mon

  • STL–AUS, 08/25/2026: From $409
    25

    Tue

  • STL–AUS, 08/26/2026: From $409
    26

    Wed

  • STL–AUS, 08/27/2026: From $285
    27

    Thu

  • STL–AUS, 08/28/2026: From $285
    28

    Fri

  • STL–AUS: cmp-view-offers-disclaimer. Find Offers
    29

    Sat

  • STL–AUS, 08/30/2026: From $280
    30

    Sun

  • STL–AUS, 08/31/2026: From $285
    31

    Mon

  • STL–AUS, 09/01/2026: From $285
    01

    Tue

    SEP

  • STL–AUS, 09/02/2026: From $285
    02

    Wed

  • STL–AUS: cmp-view-offers-disclaimer. Find Offers
    03

    Thu

  • STL–AUS, 09/04/2026: From $184
    04

    Fri

  • STL–AUS, 09/05/2026: From $184
    05

    Sat

  • STL–AUS, 09/06/2026: From $184
    06

    Sun

  • STL–AUS, 09/07/2026: From $184
    07

    Mon

  • STL–AUS, 09/08/2026: From $184
    08

    Tue

  • STL–AUS, 09/09/2026: From $184
    09

    Wed

  • STL–AUS, 09/10/2026: From $109
    10

    Thu

  • STL–AUS, 09/11/2026: From $119
    11

    Fri

  • STL–AUS, 09/12/2026: From $119
    12

    Sat

  • STL–AUS, 09/13/2026: From $164
    13

    Sun

  • STL–AUS, 09/14/2026: From $109
    14

    Mon

  • STL–AUS, 09/15/2026: From $109
    15

    Tue

  • STL–AUS, 09/16/2026: From $109
    16

    Wed

  • STL–AUS, 09/17/2026: From $119
    17

    Thu

  • STL–AUS, 09/18/2026: From $119
    18

    Fri

  • STL–AUS, 09/19/2026: From $109
    19

    Sat

  • STL–AUS, 09/20/2026: From $150
    20

    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.

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