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: 11/16/2026

One-way

Basic

From
$174
Seen: 17 hrs ago

San Antonio (SAT)to

St. Louis (STL)
Depart: 11/03/2026

One-way

Basic

From
$174
Seen: 8 hrs ago

San Antonio (SAT)to

St. Louis (STL)
Depart: 10/31/2026

One-way

Basic

From
$174
Seen: 2 hrs ago

San Antonio (SAT)to

St. Louis (STL)
Depart: 11/18/2026

One-way

Basic

From
$174
Seen: 18 hrs ago

San Antonio (SAT)to

St. Louis (STL)
Depart: 11/17/2026

One-way

Basic

From
$174
Seen: 18 hrs ago

San Antonio (SAT)to

St. Louis (STL)
Depart: 11/07/2026

One-way

Basic

From
$174
Seen: 10 hrs ago

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Explore flights from San Antonio to St. Louis

Oct 2026
From$174*
Seen: 2 hrs ago
One Way/Basic
Nov 2026
From$174*
Seen: 17 hrs ago
One Way/Basic
Dec 2026
From$179*
Seen: 10 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 October-2026
  • SAT–STL, 10/02/2026: From $529
    02

    Fri

    OCT

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

    Sat

  • SAT–STL, 10/04/2026: From $529
    04

    Sun

  • SAT–STL, 10/05/2026: From $529
    05

    Mon

  • SAT–STL, 10/06/2026: From $524
    06

    Tue

  • SAT–STL, 10/07/2026: From $524
    07

    Wed

  • SAT–STL, 10/08/2026: From $465
    08

    Thu

  • SAT–STL, 10/09/2026: From $465
    09

    Fri

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

    Sat

  • SAT–STL, 10/11/2026: From $465
    11

    Sun

  • SAT–STL, 10/12/2026: From $465
    12

    Mon

  • SAT–STL, 10/13/2026: From $460
    13

    Tue

  • SAT–STL, 10/14/2026: From $290
    14

    Wed

  • SAT–STL, 10/15/2026: From $290
    15

    Thu

  • SAT–STL, 10/16/2026: From $290
    16

    Fri

  • SAT–STL: cmp-view-offers-disclaimer. Find Offers
    17

    Sat

  • SAT–STL: cmp-view-offers-disclaimer. Find Offers
    18

    Sun

  • SAT–STL, 10/19/2026: From $290
    19

    Mon

  • SAT–STL, 10/20/2026: From $285
    20

    Tue

  • SAT–STL, 10/21/2026: From $285
    21

    Wed

  • SAT–STL, 10/22/2026: From $205
    22

    Thu

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

    Fri

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

    Sat

  • SAT–STL, 10/25/2026: From $254
    25

    Sun

  • SAT–STL, 10/26/2026: From $184
    26

    Mon

  • SAT–STL, 10/27/2026: From $179
    27

    Tue

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

    Wed

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

    Thu

  • SAT–STL, 10/30/2026: From $184
    30

    Fri

  • SAT–STL, 10/31/2026: From $174
    31

    Sat

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

    Sun

    NOV

    • 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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