Southwest® flights from St. Louis to Austin from $116

Promo Code

Low fares from St. Louis to Austin

$

St. Louis (STL)to

Austin (AUS)
Depart: 12/08/2026

One-way

Basic

From
$116
Seen: 17 hrs ago

St. Louis (STL)to

Austin (AUS)
Depart: 11/04/2026

One-way

Basic

From
$116
Seen: 20 hrs ago

St. Louis (STL)to

Austin (AUS)
Depart: 11/23/2026

One-way

Basic

From
$116
Seen: 19 hrs ago

St. Louis (STL)to

Austin (AUS)
Depart: 12/10/2026

One-way

Basic

From
$116
Seen: 13 hrs ago

St. Louis (STL)to

Austin (AUS)
Depart: 12/01/2026

One-way

Basic

From
$116
Seen: 14 hrs ago

St. Louis (STL)to

Austin (AUS)
Depart: 10/20/2026

One-way

Basic

From
$116
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.

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Explore flights from St. Louis to Austin

Sep 2026
From$419*
Seen: 2 hrs ago
One Way/Basic
Oct 2026
From$116*
Seen: 6 hrs ago
One Way/Basic
Nov 2026
From$116*
Seen: 13 hrs ago
One Way/Basic
cmp-daily-histogram-bars-legend-min-price-aria-label $116
cmp-daily-histogram-bars-legend-max-price-aria-label $419
Displaying fares for September-2026
  • STL–AUS, 09/30/2026: From $419
    30

    Wed

    SEP

  • STL–AUS, 10/01/2026: From $414
    01

    Thu

  • STL–AUS, 10/02/2026: From $414
    02

    Fri

  • STL–AUS, 10/03/2026: From $414
    03

    Sat

  • STL–AUS: cmp-view-offers-disclaimer. Find Offers
    04

    Sun

  • STL–AUS, 10/05/2026: From $419
    05

    Mon

  • STL–AUS, 10/06/2026: From $295
    06

    Tue

  • STL–AUS, 10/07/2026: From $295
    07

    Wed

  • STL–AUS, 10/08/2026: From $290
    08

    Thu

  • STL–AUS, 10/09/2026: From $295
    09

    Fri

  • STL–AUS, 10/10/2026: From $290
    10

    Sat

  • STL–AUS, 10/11/2026: From $290
    11

    Sun

  • STL–AUS, 10/12/2026: From $290
    12

    Mon

  • STL–AUS, 10/13/2026: From $295
    13

    Tue

  • STL–AUS, 10/14/2026: From $116
    14

    Wed

  • STL–AUS, 10/15/2026: From $194
    15

    Thu

  • STL–AUS, 10/16/2026: From $194
    16

    Fri

  • STL–AUS, 10/17/2026: From $194
    17

    Sat

  • STL–AUS, 10/18/2026: From $194
    18

    Sun

  • STL–AUS, 10/19/2026: From $133
    19

    Mon

  • STL–AUS, 10/20/2026: From $116
    20

    Tue

  • STL–AUS: cmp-view-offers-disclaimer. Find Offers
    21

    Wed

  • STL–AUS, 10/22/2026: From $278
    22

    Thu

  • STL–AUS, 10/23/2026: From $145
    23

    Fri

  • STL–AUS: cmp-view-offers-disclaimer. Find Offers
    24

    Sat

  • STL–AUS, 10/25/2026: From $174
    25

    Sun

  • STL–AUS, 10/26/2026: From $116
    26

    Mon

  • STL–AUS: cmp-view-offers-disclaimer. Find Offers
    27

    Tue

  • STL–AUS, 10/28/2026: From $116
    28

    Wed

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

    Thu

    • Range$116-$419

    *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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