Southwest® flights from Ontario/LA to San Antonio from $189

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Low fares from Ontario/LA to San Antonio

$

Ontario/LA (ONT)to

San Antonio (SAT)
Depart: 12/09/2026

One-way

Basic

From
$189
Seen: 2 hrs ago

Ontario/LA (ONT)to

San Antonio (SAT)
Depart: 12/05/2026

One-way

Basic

From
$189
Seen: 10 hrs ago

Ontario/LA (ONT)to

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

One-way

Basic

From
$194
Seen: 20 hrs ago

Ontario/LA (ONT)to

San Antonio (SAT)
Depart: 02/10/2027

One-way

Basic

From
$194
Seen: 5 hrs ago

Ontario/LA (ONT)to

San Antonio (SAT)
Depart: 12/30/2026

One-way

Basic

From
$194
Seen: 3 hrs ago

Ontario/LA (ONT)to

San Antonio (SAT)
Depart: 01/09/2027

One-way

Basic

From
$194
Seen: 2 hrs ago

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Explore flights from Ontario/LA to San Antonio

Nov 2026
From$294*
Seen: 12 hrs ago
One Way/Basic
Dec 2026
From$189*
Seen: 10 hrs ago
One Way/Basic
Jan 2027
From$194*
Seen: 11 hrs ago
One Way/Basic
cmp-daily-histogram-bars-legend-min-price-aria-label $189
cmp-daily-histogram-bars-legend-max-price-aria-label $554
Displaying fares for November-2026
  • ONT–SAT, 11/12/2026: From $554
    12

    Thu

    NOV

  • ONT–SAT, 11/13/2026: From $554
    13

    Fri

  • ONT–SAT: cmp-view-offers-disclaimer. Find Offers
    14

    Sat

  • ONT–SAT, 11/15/2026: From $554
    15

    Sun

  • ONT–SAT: cmp-view-offers-disclaimer. Find Offers
    16

    Mon

  • ONT–SAT, 11/17/2026: From $549
    17

    Tue

  • ONT–SAT, 11/18/2026: From $469
    18

    Wed

  • ONT–SAT: cmp-view-offers-disclaimer. Find Offers
    19

    Thu

  • ONT–SAT, 11/20/2026: From $474
    20

    Fri

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

    Sat

  • ONT–SAT, 11/22/2026: From $474
    22

    Sun

  • ONT–SAT, 11/23/2026: From $474
    23

    Mon

  • ONT–SAT, 11/24/2026: From $474
    24

    Tue

  • ONT–SAT, 11/25/2026: From $294
    25

    Wed

  • ONT–SAT, 11/26/2026: From $294
    26

    Thu

  • ONT–SAT: cmp-view-offers-disclaimer. Find Offers
    27

    Fri

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

    Sat

  • ONT–SAT, 11/29/2026: From $402
    29

    Sun

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

    Mon

  • ONT–SAT, 12/01/2026: From $289
    01

    Tue

    DEC

  • ONT–SAT, 12/02/2026: From $194
    02

    Wed

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

    Thu

  • ONT–SAT, 12/04/2026: From $224
    04

    Fri

  • ONT–SAT, 12/05/2026: From $189
    05

    Sat

  • ONT–SAT, 12/06/2026: From $254
    06

    Sun

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

    Mon

  • ONT–SAT, 12/08/2026: From $194
    08

    Tue

  • ONT–SAT, 12/09/2026: From $189
    09

    Wed

  • ONT–SAT, 12/10/2026: From $209
    10

    Thu

  • ONT–SAT: cmp-view-offers-disclaimer. Find Offers
    11

    Fri

    • Range$189-$554

    *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:
    LA/Ontario International Airport
    Arriving at:
    San Antonio International Airport
    Distance:
    1166 miles

    Questions we hear the most

    There are 139 weekly flights from Ontario/LA to San Antonio on Southwest Airlines.
    To find the lowest fares by day and time to fly Ontario/LA 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 Ontario/LA 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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