Southwest® flights from Ontario/LA to Austin from $119

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Low fares from Ontario/LA to Austin

$

Ontario/LA (ONT)to

Austin (AUS)
Depart: 09/09/2026

One-way

Basic

From
$119
Seen: 21 hrs ago

Ontario/LA (ONT)to

Austin (AUS)
Depart: 10/20/2026

One-way

Basic

From
$119
Seen: 4 hrs ago

Ontario/LA (ONT)to

Austin (AUS)
Depart: 09/15/2026

One-way

Basic

From
$119
Seen: 8 hrs ago

Ontario/LA (ONT)to

Austin (AUS)
Depart: 09/01/2026

One-way

Basic

From
$119
Seen: 23 hrs ago

Ontario/LA (ONT)to

Austin (AUS)
Depart: 09/16/2026

One-way

Basic

From
$119
Seen: 20 hrs ago

Ontario/LA (ONT)to

Austin (AUS)
Depart: 10/06/2026

One-way

Basic

From
$119
Seen: 22 hrs ago

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Explore flights from Ontario/LA to Austin

Aug 2026
From$119*
Seen: 10 hrs ago
One Way/Basic
Sep 2026
From$119*
Seen: 8 hrs ago
One Way/Basic
Oct 2026
From$119*
Seen: 22 hrs ago
One Way/Basic
cmp-daily-histogram-bars-legend-min-price-aria-label $119
cmp-daily-histogram-bars-legend-max-price-aria-label $474
Displaying fares for August-2026
  • ONT–AUS, 08/01/2026: From $474
    01

    Sat

    AUG

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

    Sun

  • ONT–AUS, 08/03/2026: From $474
    03

    Mon

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

    Tue

  • ONT–AUS, 08/05/2026: From $474
    05

    Wed

  • ONT–AUS, 08/06/2026: From $469
    06

    Thu

  • ONT–AUS, 08/07/2026: From $412
    07

    Fri

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

    Sat

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

    Sun

  • ONT–AUS, 08/10/2026: From $412
    10

    Mon

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

    Tue

  • ONT–AUS, 08/12/2026: From $417
    12

    Wed

  • ONT–AUS, 08/13/2026: From $412
    13

    Thu

  • ONT–AUS, 08/14/2026: From $292
    14

    Fri

  • ONT–AUS, 08/15/2026: From $297
    15

    Sat

  • ONT–AUS, 08/16/2026: From $297
    16

    Sun

  • ONT–AUS, 08/17/2026: From $292
    17

    Mon

  • ONT–AUS: cmp-view-offers-disclaimer. Find Offers
    18

    Tue

  • ONT–AUS, 08/19/2026: From $297
    19

    Wed

  • ONT–AUS, 08/20/2026: From $292
    20

    Thu

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

    Fri

  • ONT–AUS, 08/22/2026: From $129
    22

    Sat

  • ONT–AUS, 08/23/2026: From $265
    23

    Sun

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

    Mon

  • ONT–AUS, 08/25/2026: From $119
    25

    Tue

  • ONT–AUS, 08/26/2026: From $119
    26

    Wed

  • ONT–AUS, 08/27/2026: From $139
    27

    Thu

  • ONT–AUS, 08/28/2026: From $139
    28

    Fri

  • ONT–AUS, 08/29/2026: From $129
    29

    Sat

  • ONT–AUS, 08/30/2026: From $265
    30

    Sun

  • ONT–AUS: cmp-view-offers-disclaimer. Find Offers
    31

    Mon

    • Range$119-$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:
    LA/Ontario International Airport
    Arriving at:
    Austin-Bergstrom International Airport
    Average flight time:
    2 hours 46 minutes
    Distance:
    1196 miles

    Route Information

    153† 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 Ontario/LA to Austin is 2 hours 46 minutes.
    There are 153 weekly flights from Ontario/LA to Austin on Southwest Airlines.
    Yes, Southwest flies nonstop from Ontario/LA to Austin once per day from Monday through Friday.
    Yes, Southwest flies nonstop from Ontario/LA to Austin once per day on Sundays.
    To find the lowest fares by day and time to fly Ontario/LA to Austin with Southwest, check out our Low Fare Calendar.
    You can rent a car at Austin-Bergstrom International Airport book yours with your flight.
    Yes! Flights from Ontario/LA to Austin—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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