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Find low faresSouthwest® flights from San Antonio to Ontario/LA from $161
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1 Passenger
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Low fares from San Antonio to Ontario/LA
$
San Antonio (SAT)to
Ontario/LA (ONT)
Depart: 03/10/2026
One-way
Basic
From
$161
Seen: 19 hrs ago
San Antonio (SAT)to
Ontario/LA (ONT)
Depart: 03/30/2026
One-way
Basic
From
$161
Seen: 19 hrs ago
San Antonio (SAT)to
Ontario/LA (ONT)
Depart: 04/04/2026
One-way
Basic
From
$161
Seen: 15 hrs ago
San Antonio (SAT)to
Ontario/LA (ONT)
Depart: 03/28/2026
One-way
Basic
From
$161
Seen: 15 hrs ago
San Antonio (SAT)to
Ontario/LA (ONT)
Depart: 03/18/2026
One-way
Basic
From
$161
Seen: 21 hrs ago
San Antonio (SAT)to
Ontario/LA (ONT)
Depart: 03/09/2026
One-way
Basic
From
$161
Seen: 17 hrs ago
Explore flights from San Antonio to Ontario/LA
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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.