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: 11/07/2026

One-way

Basic

From
$109
Seen: 22 hrs ago

St. Louis (STL)to

Austin (AUS)
Depart: 10/14/2026

One-way

Basic

From
$109
Seen: 15 hrs ago

St. Louis (STL)to

Austin (AUS)
Depart: 11/04/2026

One-way

Basic

From
$109
Seen: 17 hrs ago

St. Louis (STL)to

Austin (AUS)
Depart: 10/01/2026

One-way

Basic

From
$109
Seen: 20 hrs ago

St. Louis (STL)to

Austin (AUS)
Depart: 12/10/2026

One-way

Basic

From
$109
Seen: 21 hrs ago

St. Louis (STL)to

Austin (AUS)
Depart: 12/03/2026

One-way

Basic

From
$109
Seen: 21 hrs ago

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Explore flights from St. Louis to Austin

Sep 2026
From$109*
Seen: 9 hrs ago
One Way/Basic
Oct 2026
From$109*
Seen: 17 hrs ago
One Way/Basic
Nov 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 September-2026
  • STL–AUS, 09/10/2026: From $409
    10

    Thu

    SEP

  • STL–AUS, 09/11/2026: From $409
    11

    Fri

  • STL–AUS, 09/12/2026: From $409
    12

    Sat

  • STL–AUS, 09/13/2026: From $404
    13

    Sun

  • STL–AUS, 09/14/2026: From $409
    14

    Mon

  • STL–AUS, 09/15/2026: From $409
    15

    Tue

  • STL–AUS, 09/16/2026: From $285
    16

    Wed

  • STL–AUS, 09/17/2026: From $285
    17

    Thu

  • STL–AUS, 09/18/2026: From $285
    18

    Fri

  • STL–AUS, 09/19/2026: From $285
    19

    Sat

  • STL–AUS, 09/20/2026: From $280
    20

    Sun

  • STL–AUS, 09/21/2026: From $285
    21

    Mon

  • STL–AUS, 09/22/2026: From $285
    22

    Tue

  • STL–AUS, 09/23/2026: From $184
    23

    Wed

  • STL–AUS, 09/24/2026: From $184
    24

    Thu

  • STL–AUS, 09/25/2026: From $184
    25

    Fri

  • STL–AUS, 09/26/2026: From $184
    26

    Sat

  • STL–AUS, 09/27/2026: From $249
    27

    Sun

  • STL–AUS: cmp-view-offers-disclaimer. Find Offers
    28

    Mon

  • STL–AUS, 09/29/2026: From $184
    29

    Tue

  • STL–AUS, 09/30/2026: From $109
    30

    Wed

  • STL–AUS, 10/01/2026: From $109
    01

    Thu

    OCT

  • STL–AUS, 10/02/2026: From $129
    02

    Fri

  • STL–AUS, 10/03/2026: From $119
    03

    Sat

  • STL–AUS, 10/04/2026: From $150
    04

    Sun

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

    Mon

  • STL–AUS, 10/06/2026: From $109
    06

    Tue

  • STL–AUS, 10/07/2026: From $109
    07

    Wed

  • STL–AUS, 10/08/2026: From $109
    08

    Thu

  • STL–AUS, 10/09/2026: From $129
    09

    Fri

    • 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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