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Find low faresSouthwest® flights from Buffalo/Niagara Falls to Ontario/LA from $180
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1 Passenger
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Low fares from Buffalo/Niagara Falls to Ontario/LA
$
Buffalo/Niagara Falls (BUF)to
Ontario/LA (ONT)
Depart: 05/06/2026
One-way
Basic
From
$180
Seen: 14 hrs ago
Buffalo/Niagara Falls (BUF)to
Ontario/LA (ONT)
Depart: 04/21/2026
One-way
Basic
From
$180
Seen: 9 hrs ago
Buffalo/Niagara Falls (BUF)to
Ontario/LA (ONT)
Depart: 04/15/2026
One-way
Basic
From
$185
Seen: 10 hrs ago
Buffalo/Niagara Falls (BUF)to
Ontario/LA (ONT)
Depart: 03/05/2026
One-way
Basic
From
$193
Seen: 21 hrs ago
Buffalo/Niagara Falls (BUF)to
Ontario/LA (ONT)
Depart: 03/12/2026
One-way
Basic
From
$219
Seen: 19 hrs ago
Buffalo/Niagara Falls (BUF)to
Ontario/LA (ONT)
Depart: 05/07/2026
One-way
Basic
From
$219
Seen: 14 hrs ago
Explore flights from Buffalo/Niagara Falls to Ontario/LA
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Flight Details
Departing from:
Buffalo Niagara International Airport
Arriving at:
LA/Ontario International Airport
Distance:
2173 miles
Route Information
82† 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 82 weekly flights from Buffalo/Niagara Falls to Ontario/LA on Southwest Airlines.
To find the lowest fares by day and time to fly Buffalo/Niagara Falls 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 Buffalo/Niagara Falls 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.