Southwest® flights from St. Louis to San Antonio from $141

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Low fares from St. Louis to San Antonio

$

St. Louis (STL)to

San Antonio (SAT)
Depart: 01/13/2027

One-way

Basic

From
$141
Seen: 16 hrs ago

St. Louis (STL)to

San Antonio (SAT)
Depart: 12/22/2026

One-way

Basic

From
$141
Seen: 22 hrs ago

St. Louis (STL)to

San Antonio (SAT)
Depart: 11/24/2026

One-way

Basic

From
$141
Seen: 6 hrs ago

St. Louis (STL)to

San Antonio (SAT)
Depart: 12/08/2026

One-way

Basic

From
$141
Seen: 15 minutes ago

St. Louis (STL)to

San Antonio (SAT)
Depart: 11/25/2026

One-way

Basic

From
$141
Seen: 22 hrs ago

St. Louis (STL)to

San Antonio (SAT)
Depart: 01/06/2027

One-way

Basic

From
$141
Seen: 15 hrs ago

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Explore flights from St. Louis to San Antonio

Oct 2026
From$314*
Seen: 9 minutes ago
One Way/Basic
Nov 2026
From$141*
Seen: 22 hrs ago
One Way/Basic
Dec 2026
From$141*
Seen: 12 hrs ago
One Way/Basic
cmp-daily-histogram-bars-legend-min-price-aria-label $159
cmp-daily-histogram-bars-legend-max-price-aria-label $459
Displaying fares for October-2026
  • STL–SAT, 10/23/2026: From $459
    23

    Fri

    OCT

  • STL–SAT, 10/24/2026: From $459
    24

    Sat

  • STL–SAT, 10/25/2026: From $459
    25

    Sun

  • STL–SAT, 10/26/2026: From $459
    26

    Mon

  • STL–SAT, 10/27/2026: From $459
    27

    Tue

  • STL–SAT, 10/28/2026: From $459
    28

    Wed

  • STL–SAT, 10/29/2026: From $314
    29

    Thu

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

    Fri

  • STL–SAT: cmp-view-offers-disclaimer. Find Offers
    31

    Sat

  • STL–SAT: cmp-view-offers-disclaimer. Find Offers
    01

    Sun

    NOV

  • STL–SAT, 11/02/2026: From $314
    02

    Mon

  • STL–SAT, 11/03/2026: From $324
    03

    Tue

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

    Wed

  • STL–SAT, 11/05/2026: From $209
    05

    Thu

  • STL–SAT, 11/06/2026: From $209
    06

    Fri

  • STL–SAT: cmp-view-offers-disclaimer. Find Offers
    07

    Sat

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

    Sun

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

    Mon

  • STL–SAT, 11/10/2026: From $159
    10

    Tue

  • STL–SAT, 11/11/2026: From $159
    11

    Wed

  • STL–SAT, 11/12/2026: From $159
    12

    Thu

  • STL–SAT, 11/13/2026: From $159
    13

    Fri

  • STL–SAT, 11/14/2026: From $159
    14

    Sat

  • STL–SAT: cmp-view-offers-disclaimer. Find Offers
    15

    Sun

  • STL–SAT, 11/16/2026: From $159
    16

    Mon

  • STL–SAT, 11/17/2026: From $159
    17

    Tue

  • STL–SAT, 11/18/2026: From $159
    18

    Wed

  • STL–SAT, 11/19/2026: From $159
    19

    Thu

  • STL–SAT: cmp-view-offers-disclaimer. Find Offers
    20

    Fri

  • STL–SAT, 11/21/2026: From $159
    21

    Sat

  • STL–SAT, 11/22/2026: From $159
    22

    Sun

    • Range$159-$459

    *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:
    San Antonio International Airport
    Average flight time:
    2 hours 14 minutes
    Distance:
    786 miles

    Questions we hear the most

    The average flight time from St. Louis to San Antonio is 2 hours 14 minutes.
    There are 156 weekly flights from St. Louis to San Antonio on Southwest Airlines.
    Yes, Southwest flies nonstop from St. Louis to San Antonio once per day from Monday through Friday.
    Yes, Southwest flies nonstop from St. Louis to San Antonio once per day on Saturdays and Sundays.
    To find the lowest fares by day and time to fly St. Louis to San Antonio with Southwest, check out our Low Fare Calendar.
    You can rent a car at San Antonio International Airport book yours with your flight.
    Yes! Flights from St. Louis to San Antonio—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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