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

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Low fares from Austin to Ontario/LA

$

Austin (AUS)to

Ontario/LA (ONT)
Depart: 04/14/2026

One-way

Basic

From
$149
Seen: 23 hrs ago

Austin (AUS)to

Ontario/LA (ONT)
Depart: 03/04/2026

One-way

Basic

From
$149
Seen: 15 hrs ago

Austin (AUS)to

Ontario/LA (ONT)
Depart: 02/25/2026

One-way

Basic

From
$149
Seen: 16 hrs ago

Austin (AUS)to

Ontario/LA (ONT)
Depart: 04/01/2026

One-way

Basic

From
$149
Seen: 7 hrs ago

Austin (AUS)to

Ontario/LA (ONT)
Depart: 03/03/2026

One-way

Basic

From
$149
Seen: 4 hrs ago

Austin (AUS)to

Ontario/LA (ONT)
Depart: 03/25/2026

One-way

Basic

From
$149
Seen: 4 hrs ago

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Explore flights from Austin to Ontario/LA

*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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