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

Promo Code

Low fares from San Antonio to St. Louis

$

San Antonio (SAT)to

St. Louis (STL)
Depart: 01/12/2027

One-way

Basic

From
$141
Seen: 7 hrs ago

San Antonio (SAT)to

St. Louis (STL)
Depart: 12/09/2026

One-way

Basic

From
$141
Seen: 4 hrs ago

San Antonio (SAT)to

St. Louis (STL)
Depart: 12/02/2026

One-way

Basic

From
$141
Seen: 2 hrs ago

San Antonio (SAT)to

St. Louis (STL)
Depart: 12/29/2026

One-way

Basic

From
$144
Seen: 16 hrs ago

San Antonio (SAT)to

St. Louis (STL)
Depart: 12/23/2026

One-way

Basic

From
$144
Seen: 3 hrs ago

San Antonio (SAT)to

St. Louis (STL)
Depart: 12/22/2026

One-way

Basic

From
$144
Seen: 18 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.

Find low fares

Explore flights from San Antonio to St. Louis

Oct 2026
From$314*
Seen: 12 hrs ago
One Way/Basic
Nov 2026
From$159*
Seen: 15 hrs ago
One Way/Basic
Dec 2026
From$141*
Seen: 2 hrs ago
One Way/Basic
cmp-daily-histogram-bars-legend-min-price-aria-label $159
cmp-daily-histogram-bars-legend-max-price-aria-label $469
Displaying fares for October-2026
  • SAT–STL: cmp-view-offers-disclaimer. Find Offers
    23

    Fri

    OCT

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

    Sat

  • SAT–STL: cmp-view-offers-disclaimer. Find Offers
    25

    Sun

  • SAT–STL, 10/26/2026: From $469
    26

    Mon

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

    Tue

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

    Wed

  • SAT–STL, 10/29/2026: From $324
    29

    Thu

  • SAT–STL, 10/30/2026: From $324
    30

    Fri

  • SAT–STL, 10/31/2026: From $314
    31

    Sat

  • SAT–STL, 11/01/2026: From $314
    01

    Sun

    NOV

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

    Mon

  • SAT–STL, 11/03/2026: From $314
    03

    Tue

  • SAT–STL, 11/04/2026: From $314
    04

    Wed

  • SAT–STL, 11/05/2026: From $316
    05

    Thu

  • SAT–STL, 11/06/2026: From $219
    06

    Fri

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

    Sat

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

    Sun

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

    Mon

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

    Tue

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

    Wed

  • SAT–STL, 11/12/2026: From $169
    12

    Thu

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

    Fri

  • SAT–STL, 11/14/2026: From $169
    14

    Sat

  • SAT–STL, 11/15/2026: From $236
    15

    Sun

  • SAT–STL, 11/16/2026: From $166
    16

    Mon

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

    Tue

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

    Wed

  • SAT–STL, 11/19/2026: From $169
    19

    Thu

  • SAT–STL, 11/20/2026: From $218
    20

    Fri

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

    Sat

  • SAT–STL, 11/22/2026: From $169
    22

    Sun

    • Range$159-$469

    *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

    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.

    Explore Flights from Other Popular Origins

    Popular Flights from San Antonio