Southwest® flights from Washington, D.C. (Reagan National) to Ontario/LA from $176
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Low fares from Washington, D.C. (Reagan National) to Ontario/LA
$
Washington, D.C. (Reagan National) (DCA)to
Ontario/LA (ONT)
Depart: 09/15/2026
One-way
Basic
From
$176
Seen: 13 hrs ago
Washington, D.C. (Reagan National) (DCA)to
Ontario/LA (ONT)
Depart: 11/07/2026
One-way
Basic
From
$176
Seen: 5 hrs ago
Washington, D.C. (Reagan National) (DCA)to
Ontario/LA (ONT)
Depart: 10/29/2026
One-way
Basic
From
$176
Seen: 9 hrs ago
Washington, D.C. (Reagan National) (DCA)to
Ontario/LA (ONT)
Depart: 10/20/2026
One-way
Basic
From
$181
Seen: 19 hrs ago
Washington, D.C. (Reagan National) (DCA)to
Ontario/LA (ONT)
Depart: 09/26/2026
One-way
Basic
From
$181
Seen: 6 hrs ago
Washington, D.C. (Reagan National) (DCA)to
Ontario/LA (ONT)
Depart: 10/07/2026
One-way
Basic
From
$181
Seen: 17 hrs ago
Explore flights from Washington, D.C. (Reagan National) to Ontario/LA
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Flight Details
Departing from:
Ronald Reagan National Airport
Arriving at:
LA/Ontario International Airport
Distance:
2265 miles
Route Information
106† 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 106 weekly flights from Washington, D.C. (Reagan National) to Ontario/LA on Southwest Airlines.
To find the lowest fares by day and time to fly Washington, D.C. (Reagan National) 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 Washington, D.C. (Reagan National) 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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