Southwest® flights from San Antonio to Ontario/LA from $173

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Low fares from San Antonio to Ontario/LA

$

San Antonio (SAT)to

Ontario/LA (ONT)
Depart: 11/17/2026

One-way

Basic

From
$173
Seen: 14 hrs ago

San Antonio (SAT)to

Ontario/LA (ONT)
Depart: 12/01/2026

One-way

Basic

From
$178
Seen: 19 hrs ago

San Antonio (SAT)to

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

One-way

Basic

From
$178
Seen: 10 hrs ago

San Antonio (SAT)to

Ontario/LA (ONT)
Depart: 12/12/2026

One-way

Basic

From
$178
Seen: 9 hrs ago

San Antonio (SAT)to

Ontario/LA (ONT)
Depart: 10/15/2026

One-way

Basic

From
$178
Seen: 22 hrs ago

San Antonio (SAT)to

Ontario/LA (ONT)
Depart: 10/05/2026

One-way

Basic

From
$178
Seen: 15 hrs ago

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Explore flights from San Antonio to Ontario/LA

Sep 2026
From$216*
Seen: 9 hrs ago
One Way/Basic
Oct 2026
From$178*
Seen: 22 hrs ago
One Way/Basic
Nov 2026
From$173*
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 September-2026
  • SAT–ONT, 09/11/2026: From $529
    11

    Fri

    SEP

  • SAT–ONT, 09/12/2026: From $529
    12

    Sat

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

    Sun

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

    Mon

  • SAT–ONT, 09/15/2026: From $529
    15

    Tue

  • SAT–ONT, 09/16/2026: From $449
    16

    Wed

  • SAT–ONT, 09/17/2026: From $459
    17

    Thu

  • SAT–ONT, 09/18/2026: From $449
    18

    Fri

  • SAT–ONT, 09/19/2026: From $385
    19

    Sat

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

    Sun

  • SAT–ONT, 09/21/2026: From $449
    21

    Mon

  • SAT–ONT, 09/22/2026: From $449
    22

    Tue

  • SAT–ONT, 09/23/2026: From $269
    23

    Wed

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

    Thu

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

    Fri

  • SAT–ONT, 09/26/2026: From $269
    26

    Sat

  • SAT–ONT, 09/27/2026: From $269
    27

    Sun

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

    Mon

  • SAT–ONT, 09/29/2026: From $269
    29

    Tue

  • SAT–ONT, 09/30/2026: From $216
    30

    Wed

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

    Thu

    OCT

  • SAT–ONT: cmp-view-offers-disclaimer. Find Offers
    02

    Fri

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

    Sat

  • SAT–ONT: cmp-view-offers-disclaimer. Find Offers
    04

    Sun

  • SAT–ONT, 10/05/2026: From $178
    05

    Mon

  • SAT–ONT, 10/06/2026: From $178
    06

    Tue

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

    Wed

  • SAT–ONT, 10/08/2026: From $216
    08

    Thu

  • SAT–ONT, 10/09/2026: From $249
    09

    Fri

  • SAT–ONT, 10/10/2026: From $221
    10

    Sat

    • 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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