Southwest® flights from Austin to Ontario/LA from $149

Promo Code

Low fares from Austin to Ontario/LA

$

Austin (AUS)to

Ontario/LA (ONT)
Depart: 12/17/2026

One-way

Basic

From
$149
Seen: 13 hrs ago

Austin (AUS)to

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

One-way

Basic

From
$149
Seen: 10 hrs ago

Austin (AUS)to

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

One-way

Basic

From
$149
Seen: 16 hrs ago

Austin (AUS)to

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

One-way

Basic

From
$149
Seen: 22 hrs ago

Austin (AUS)to

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

One-way

Basic

From
$149
Seen: 5 hrs ago

Austin (AUS)to

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

One-way

Basic

From
$149
Seen: 22 hrs ago

Looking for more low-fare flights?

Check out the Low Fare Calendar to find a fare that works for you. Just choose the month you want to depart and return, and we’ll show you the best fares available.

Find low fares

Explore flights from Austin to Ontario/LA

Sep 2026
From$149*
Seen: 5 hrs ago
One Way/Basic
Oct 2026
From$149*
Seen: 21 hrs ago
One Way/Basic
Nov 2026
From$149*
Seen: 14 hrs ago
One Way/Basic
cmp-daily-histogram-bars-legend-min-price-aria-label $149
cmp-daily-histogram-bars-legend-max-price-aria-label $484
Displaying fares for September-2026
  • AUS–ONT, 09/11/2026: From $474
    11

    Fri

    SEP

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

    Sat

  • AUS–ONT, 09/13/2026: From $474
    13

    Sun

  • AUS–ONT, 09/14/2026: From $474
    14

    Mon

  • AUS–ONT, 09/15/2026: From $474
    15

    Tue

  • AUS–ONT, 09/16/2026: From $484
    16

    Wed

  • AUS–ONT, 09/17/2026: From $417
    17

    Thu

  • AUS–ONT, 09/18/2026: From $417
    18

    Fri

  • AUS–ONT, 09/19/2026: From $427
    19

    Sat

  • AUS–ONT, 09/20/2026: From $427
    20

    Sun

  • AUS–ONT, 09/21/2026: From $417
    21

    Mon

  • AUS–ONT, 09/22/2026: From $417
    22

    Tue

  • AUS–ONT, 09/23/2026: From $417
    23

    Wed

  • AUS–ONT, 09/24/2026: From $297
    24

    Thu

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

    Fri

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

    Sat

  • AUS–ONT, 09/27/2026: From $297
    27

    Sun

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

    Mon

  • AUS–ONT, 09/29/2026: From $297
    29

    Tue

  • AUS–ONT, 09/30/2026: From $149
    30

    Wed

  • AUS–ONT, 10/01/2026: From $159
    01

    Thu

    OCT

  • AUS–ONT, 10/02/2026: From $159
    02

    Fri

  • AUS–ONT, 10/03/2026: From $159
    03

    Sat

  • AUS–ONT, 10/04/2026: From $219
    04

    Sun

  • AUS–ONT, 10/05/2026: From $159
    05

    Mon

  • AUS–ONT, 10/06/2026: From $149
    06

    Tue

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

    Wed

  • AUS–ONT, 10/08/2026: From $159
    08

    Thu

  • AUS–ONT, 10/09/2026: From $214
    09

    Fri

  • AUS–ONT, 10/10/2026: From $159
    10

    Sat

    • Range$149-$484

    *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.

    Explore Flights from Other Popular Origins

    Popular Flights from Austin