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Find low faresSouthwest® flights from Grand Rapids to Ontario/LA from $179
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Low fares from Grand Rapids to Ontario/LA
$
Grand Rapids (GRR)to
Ontario/LA (ONT)
Depart: 04/07/2026
One-way
Basic
From
$179
Seen: 7 hrs ago
Grand Rapids (GRR)to
Ontario/LA (ONT)
Depart: 03/17/2026
One-way
Basic
From
$179
Seen: 10 hrs ago
Grand Rapids (GRR)to
Ontario/LA (ONT)
Depart: 03/02/2026
One-way
Basic
From
$180
Seen: 16 hrs ago
Grand Rapids (GRR)to
Ontario/LA (ONT)
Depart: 03/03/2026
One-way
Basic
From
$184
Seen: 16 hrs ago
Grand Rapids (GRR)to
Ontario/LA (ONT)
Depart: 02/25/2026
One-way
Basic
From
$194
Seen: 13 hrs ago
Grand Rapids (GRR)to
Ontario/LA (ONT)
Depart: 04/08/2026
One-way
Basic
From
$201
Seen: 7 hrs ago
Explore flights from Grand Rapids to Ontario/LA
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Flight Details
Departing from:
Kent County International Airport
Arriving at:
LA/Ontario International Airport
Distance:
1830 miles
Route Information
66† 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 66 weekly flights from Grand Rapids to Ontario/LA on Southwest Airlines.
To find the lowest fares by day and time to fly Grand Rapids 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 Grand Rapids 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.