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Find low faresSouthwest® flights from Ontario/LA to Portland, OR from $84
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1 Passenger
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Low fares from Ontario/LA to Portland, OR
$
Ontario/LA (ONT)to
Portland, OR (PDX)
Depart: 04/01/2026
One-way
Basic
From
$84
Seen: 23 hrs ago
Ontario/LA (ONT)to
Portland, OR (PDX)
Depart: 03/02/2026
One-way
Basic
From
$84
Seen: 21 hrs ago
Ontario/LA (ONT)to
Portland, OR (PDX)
Depart: 04/24/2026
One-way
Basic
From
$84
Seen: 9 hrs ago
Ontario/LA (ONT)to
Portland, OR (PDX)
Depart: 04/28/2026
One-way
Basic
From
$84
Seen: 2 hrs ago
Ontario/LA (ONT)to
Portland, OR (PDX)
Depart: 02/21/2026
One-way
Basic
From
$84
Seen: 6 hrs ago
Ontario/LA (ONT)to
Portland, OR (PDX)
Depart: 05/06/2026
One-way
Basic
From
$84
Seen: 7 hrs ago
Explore flights from Ontario/LA to Portland, OR
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Flight Details
Departing from:
LA/Ontario International Airport
Arriving at:
Portland International Airport
Distance:
838 miles
Route Information
153† 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 153 weekly flights from Ontario/LA to Portland, OR on Southwest Airlines.
To find the lowest fares by day and time to fly Ontario/LA to Portland, OR with Southwest, check out our Low Fare Calendar.
You can rent a car at Portland International Airport book yours with your flight.
Yes! Flights from Ontario/LA to Portland, OR—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.