Southwest® flights from Austin to Ontario/LA from $139

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Low fares from Austin to Ontario/LA

$

Austin (AUS)to

Ontario/LA (ONT)
Depart: 11/18/2026

One-way

Basic

From
$139
Seen: 22 hrs ago

Austin (AUS)to

Ontario/LA (ONT)
Depart: 09/30/2026

One-way

Basic

From
$139
Seen: 7 hrs ago

Austin (AUS)to

Ontario/LA (ONT)
Depart: 09/10/2026

One-way

Basic

From
$139
Seen: 16 hrs ago

Austin (AUS)to

Ontario/LA (ONT)
Depart: 10/07/2026

One-way

Basic

From
$139
Seen: 20 hrs ago

Austin (AUS)to

Ontario/LA (ONT)
Depart: 09/22/2026

One-way

Basic

From
$139
Seen: 20 hrs ago

Austin (AUS)to

Ontario/LA (ONT)
Depart: 11/05/2026

One-way

Basic

From
$139
Seen: 12 hrs ago

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Explore flights from Austin to Ontario/LA

Aug 2026
From$417*
Seen: 17 hrs ago
One Way/Basic
Sep 2026
From$139*
Seen: 20 hrs ago
One Way/Basic
Oct 2026
From$139*
Seen: 20 hrs ago
One Way/Basic
cmp-daily-histogram-bars-legend-min-price-aria-label $139
cmp-daily-histogram-bars-legend-max-price-aria-label $474
Displaying fares for August-2026
  • AUS–ONT, 08/21/2026: From $474
    21

    Fri

    AUG

  • AUS–ONT, 08/22/2026: From $474
    22

    Sat

  • AUS–ONT: cmp-view-offers-disclaimer. Find Offers
    23

    Sun

  • AUS–ONT, 08/24/2026: From $474
    24

    Mon

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    25

    Tue

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    26

    Wed

  • AUS–ONT, 08/27/2026: From $417
    27

    Thu

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

    Fri

  • AUS–ONT: cmp-view-offers-disclaimer. Find Offers
    29

    Sat

  • AUS–ONT, 08/30/2026: From $417
    30

    Sun

  • AUS–ONT, 08/31/2026: From $417
    31

    Mon

  • AUS–ONT, 09/01/2026: From $417
    01

    Tue

    SEP

  • AUS–ONT, 09/02/2026: From $417
    02

    Wed

  • AUS–ONT, 09/03/2026: From $297
    03

    Thu

  • AUS–ONT, 09/04/2026: From $297
    04

    Fri

  • AUS–ONT, 09/05/2026: From $297
    05

    Sat

  • AUS–ONT, 09/06/2026: From $297
    06

    Sun

  • AUS–ONT, 09/07/2026: From $297
    07

    Mon

  • AUS–ONT, 09/08/2026: From $297
    08

    Tue

  • AUS–ONT: cmp-view-offers-disclaimer. Find Offers
    09

    Wed

  • AUS–ONT, 09/10/2026: From $139
    10

    Thu

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

    Fri

  • AUS–ONT, 09/12/2026: From $144
    12

    Sat

  • AUS–ONT, 09/13/2026: From $219
    13

    Sun

  • AUS–ONT, 09/14/2026: From $144
    14

    Mon

  • AUS–ONT, 09/15/2026: From $139
    15

    Tue

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

    Wed

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    17

    Thu

  • AUS–ONT, 09/18/2026: From $165
    18

    Fri

  • AUS–ONT, 09/19/2026: From $144
    19

    Sat

  • AUS–ONT, 09/20/2026: From $179
    20

    Sun

    • Range$139-$474

    *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:
    Austin-Bergstrom International Airport
    Arriving at:
    LA/Ontario International Airport
    Average flight time:
    3 hours 3 minutes
    Distance:
    1196 miles

    Route Information

    152† Weekly flights
    • 1‡ Nonstop flight per day Monday through Friday
    • 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 Austin to Ontario/LA is 3 hours 3 minutes.
    There are 152 weekly flights from Austin to Ontario/LA on Southwest Airlines.
    Yes, Southwest flies nonstop from Austin to Ontario/LA once per day from Monday through Friday.
    Yes, Southwest flies nonstop from Austin to Ontario/LA once per day on Sundays.
    To find the lowest fares by day and time to fly Austin 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 Austin 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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