Southwest® flights from San Antonio to St. Louis from $174

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Low fares from San Antonio to St. Louis

$

San Antonio (SAT)to

St. Louis (STL)
Depart: 10/29/2026

One-way

Basic

From
$174
Seen: 23 hrs ago

San Antonio (SAT)to

St. Louis (STL)
Depart: 10/03/2026

One-way

Basic

From
$174
Seen: 14 hrs ago

San Antonio (SAT)to

St. Louis (STL)
Depart: 10/14/2026

One-way

Basic

From
$174
Seen: 6 hrs ago

San Antonio (SAT)to

St. Louis (STL)
Depart: 11/13/2026

One-way

Basic

From
$174
Seen: 19 hrs ago

San Antonio (SAT)to

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

One-way

Basic

From
$174
Seen: 14 hrs ago

San Antonio (SAT)to

St. Louis (STL)
Depart: 10/13/2026

One-way

Basic

From
$174
Seen: 13 hrs ago

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Explore flights from San Antonio to St. Louis

Sep 2026
From$280*
Seen: 10 hrs ago
One Way/Basic
Oct 2026
From$174*
Seen: 14 hrs ago
One Way/Basic
Nov 2026
From$174*
Seen: 2 hrs ago
One Way/Basic
cmp-daily-histogram-bars-legend-min-price-aria-label $174
cmp-daily-histogram-bars-legend-max-price-aria-label $529
Displaying fares for September-2026
  • SAT–STL, 09/11/2026: From $529
    11

    Fri

    SEP

  • SAT–STL, 09/12/2026: From $519
    12

    Sat

  • SAT–STL, 09/13/2026: From $529
    13

    Sun

  • SAT–STL, 09/14/2026: From $519
    14

    Mon

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

    Tue

  • SAT–STL, 09/16/2026: From $529
    16

    Wed

  • SAT–STL, 09/17/2026: From $455
    17

    Thu

  • SAT–STL, 09/18/2026: From $465
    18

    Fri

  • SAT–STL, 09/19/2026: From $465
    19

    Sat

  • SAT–STL, 09/20/2026: From $465
    20

    Sun

  • SAT–STL, 09/21/2026: From $465
    21

    Mon

  • SAT–STL, 09/22/2026: From $465
    22

    Tue

  • SAT–STL: cmp-view-offers-disclaimer. Find Offers
    23

    Wed

  • SAT–STL, 09/24/2026: From $296
    24

    Thu

  • SAT–STL, 09/25/2026: From $296
    25

    Fri

  • SAT–STL, 09/26/2026: From $280
    26

    Sat

  • SAT–STL, 09/27/2026: From $290
    27

    Sun

  • SAT–STL, 09/28/2026: From $280
    28

    Mon

  • SAT–STL, 09/29/2026: From $280
    29

    Tue

  • SAT–STL, 09/30/2026: From $290
    30

    Wed

  • SAT–STL, 10/01/2026: From $184
    01

    Thu

    OCT

  • SAT–STL, 10/02/2026: From $184
    02

    Fri

  • SAT–STL, 10/03/2026: From $174
    03

    Sat

  • SAT–STL, 10/04/2026: From $214
    04

    Sun

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

    Mon

  • SAT–STL: cmp-view-offers-disclaimer. Find Offers
    06

    Tue

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

    Wed

  • SAT–STL, 10/08/2026: From $251
    08

    Thu

  • SAT–STL, 10/09/2026: From $263
    09

    Fri

  • SAT–STL: cmp-view-offers-disclaimer. Find Offers
    10

    Sat

    • Range$174-$529

    *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:
    San Antonio International Airport
    Arriving at:
    Lambert-St Louis Int'l Airport
    Average flight time:
    2 hours 5 minutes
    Distance:
    786 miles

    Route Information

    156† Weekly flights
    • 1‡ Nonstop flight per day Monday through Friday
    • 1‡ Nonstop flight on Saturday
    • 1‡ Nonstop flight 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 San Antonio to St. Louis is 2 hours 5 minutes.
    There are 156 weekly flights from San Antonio to St. Louis on Southwest Airlines.
    Yes, Southwest flies nonstop from San Antonio to St. Louis once per day from Monday through Friday.
    Yes, Southwest flies nonstop from San Antonio to St. Louis once per day on Saturdays and Sundays.
    To find the lowest fares by day and time to fly San Antonio 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 San Antonio 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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