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

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Low fares from Austin to St. Louis

$

Austin (AUS)to

St. Louis (STL)
Depart: 09/05/2026

One-way

Basic

From
$109
Seen: 6 hrs ago

Austin (AUS)to

St. Louis (STL)
Depart: 09/11/2026

One-way

Basic

From
$109
Seen: 8 hrs ago

Austin (AUS)to

St. Louis (STL)
Depart: 10/27/2026

One-way

Basic

From
$119
Seen: 22 hrs ago

Austin (AUS)to

St. Louis (STL)
Depart: 11/09/2026

One-way

Basic

From
$119
Seen: 17 hrs ago

Austin (AUS)to

St. Louis (STL)
Depart: 08/22/2026

One-way

Basic

From
$119
Seen: 5 hrs ago

Austin (AUS)to

St. Louis (STL)
Depart: 08/25/2026

One-way

Basic

From
$119
Seen: 4 hrs ago

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Explore flights from Austin to St. Louis

Aug 2026
From$119*
Seen: 5 hrs ago
One Way/Basic
Sep 2026
From$109*
Seen: 6 hrs ago
One Way/Basic
Oct 2026
From$119*
Seen: 11 minutes ago
One Way/Basic
cmp-daily-histogram-bars-legend-min-price-aria-label $119
cmp-daily-histogram-bars-legend-max-price-aria-label $409
Displaying fares for August-2026
  • AUS–STL, 08/01/2026: From $409
    01

    Sat

    AUG

  • AUS–STL, 08/02/2026: From $404
    02

    Sun

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

    Mon

  • AUS–STL, 08/04/2026: From $404
    04

    Tue

  • AUS–STL, 08/05/2026: From $404
    05

    Wed

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

    Thu

  • AUS–STL, 08/07/2026: From $280
    07

    Fri

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

    Sat

  • AUS–STL, 08/09/2026: From $280
    09

    Sun

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

    Mon

  • AUS–STL, 08/11/2026: From $280
    11

    Tue

  • AUS–STL, 08/12/2026: From $280
    12

    Wed

  • AUS–STL, 08/13/2026: From $280
    13

    Thu

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

    Fri

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

    Sat

  • AUS–STL: cmp-view-offers-disclaimer. Find Offers
    16

    Sun

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

    Mon

  • AUS–STL, 08/18/2026: From $179
    18

    Tue

  • AUS–STL, 08/19/2026: From $179
    19

    Wed

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

    Thu

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

    Fri

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

    Sat

  • AUS–STL, 08/23/2026: From $150
    23

    Sun

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

    Mon

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

    Tue

  • AUS–STL: cmp-view-offers-disclaimer. Find Offers
    26

    Wed

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

    Thu

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

    Fri

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

    Sat

  • AUS–STL, 08/30/2026: From $164
    30

    Sun

  • AUS–STL, 08/31/2026: From $119
    31

    Mon

    • Range$119-$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:
    Austin-Bergstrom International Airport
    Arriving at:
    Lambert-St Louis Int'l Airport
    Average flight time:
    2 hours 5 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 Austin to St. Louis is 2 hours 5 minutes.
    There are 156 weekly flights from Austin to St. Louis on Southwest Airlines.
    Yes, Southwest flies nonstop from Austin to St. Louis 2 times per day from Monday through Friday.
    Yes, Southwest flies nonstop from Austin to St. Louis once per day on Saturdays and 3 times per day on Sundays.
    To find the lowest fares by day and time to fly Austin to St. Louis with Southwest, check out our Low Fare Calendar.
    You can rent a car at Lambert-St Louis Int'l Airport book yours with your flight.
    Yes! Flights from Austin to St. Louis—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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