Southwest® flights from San Antonio to Ontario/LA from $178

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Low fares from San Antonio to Ontario/LA

$

San Antonio (SAT)to

Ontario/LA (ONT)
Depart: 09/16/2026

One-way

Basic

From
$178
Seen: 22 hrs ago

San Antonio (SAT)to

Ontario/LA (ONT)
Depart: 11/04/2026

One-way

Basic

From
$178
Seen: 22 hrs ago

San Antonio (SAT)to

Ontario/LA (ONT)
Depart: 10/29/2026

One-way

Basic

From
$178
Seen: 18 hrs ago

San Antonio (SAT)to

Ontario/LA (ONT)
Depart: 10/14/2026

One-way

Basic

From
$178
Seen: 15 hrs ago

San Antonio (SAT)to

Ontario/LA (ONT)
Depart: 09/09/2026

One-way

Basic

From
$178
Seen: 10 hrs ago

San Antonio (SAT)to

Ontario/LA (ONT)
Depart: 09/15/2026

One-way

Basic

From
$178
Seen: 9 hrs ago

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Explore flights from San Antonio to Ontario/LA

Aug 2026
From$449*
Seen: 8 hrs ago
One Way/Basic
Sep 2026
From$178*
Seen: 10 hrs ago
One Way/Basic
Oct 2026
From$178*
Seen: 14 hrs ago
One Way/Basic
cmp-daily-histogram-bars-legend-min-price-aria-label $178
cmp-daily-histogram-bars-legend-max-price-aria-label $529
Displaying fares for August-2026
  • SAT–ONT, 08/22/2026: From $529
    22

    Sat

    AUG

  • SAT–ONT, 08/23/2026: From $529
    23

    Sun

  • SAT–ONT, 08/24/2026: From $529
    24

    Mon

  • SAT–ONT, 08/25/2026: From $529
    25

    Tue

  • SAT–ONT: cmp-view-offers-disclaimer. Find Offers
    26

    Wed

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

    Thu

  • SAT–ONT, 08/28/2026: From $449
    28

    Fri

  • SAT–ONT, 08/29/2026: From $449
    29

    Sat

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

    Sun

  • SAT–ONT, 08/31/2026: From $449
    31

    Mon

  • SAT–ONT, 09/01/2026: From $449
    01

    Tue

    SEP

  • SAT–ONT, 09/02/2026: From $449
    02

    Wed

  • SAT–ONT, 09/03/2026: From $449
    03

    Thu

  • SAT–ONT, 09/04/2026: From $347
    04

    Fri

  • SAT–ONT, 09/05/2026: From $269
    05

    Sat

  • SAT–ONT, 09/06/2026: From $178
    06

    Sun

  • SAT–ONT, 09/07/2026: From $295
    07

    Mon

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

    Tue

  • SAT–ONT, 09/09/2026: From $178
    09

    Wed

  • SAT–ONT, 09/10/2026: From $178
    10

    Thu

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

    Fri

  • SAT–ONT: cmp-view-offers-disclaimer. Find Offers
    12

    Sat

  • SAT–ONT, 09/13/2026: From $239
    13

    Sun

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

    Mon

  • SAT–ONT, 09/15/2026: From $178
    15

    Tue

  • SAT–ONT, 09/16/2026: From $178
    16

    Wed

  • SAT–ONT, 09/17/2026: From $193
    17

    Thu

  • SAT–ONT, 09/18/2026: From $193
    18

    Fri

  • SAT–ONT, 09/19/2026: From $193
    19

    Sat

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

    Sun

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

    Mon

    • Range$178-$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:
    LA/Ontario International Airport
    Distance:
    1166 miles

    Route Information

    149† Weekly flights

    † 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

    There are 149 weekly flights from San Antonio to Ontario/LA on Southwest Airlines.
    To find the lowest fares by day and time to fly San Antonio to Ontario/LA with Southwest, check out our Low Fare Calendar.
    You can rent a car at LA/Ontario International Airport book yours with your flight.
    Yes! Flights from San Antonio to Ontario/LA—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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