₩197,500 Cheap Flights from Philadelphia (PHL) to Ontario (ONT)

View ₩197,500 flight on Fri, May 29, 2026Opens in a new window

Popular airlines from Philadelphia Intl. Airport (PHL) to Los Angeles - Ontario Intl. Airport (ONT)

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Cheap Flights from Philadelphia to Ontario (PHL-ONT)

Prices were available within the past 7 days and start at ₩197,500 for one-way flights and ₩425,000 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Delta
Sun, May 24 - Fri, May 29
PHL
Philadelphia
ONT
Ontario
₩425,000 Roundtrip, found 10 hours ago
₩425,000
Roundtrip
found 10 hours ago
Select Delta flight, departing Sun, May 24 from Philadelphia to Ontario, returning Fri, May 29, priced at ₩425,000 found 10 hours ago
Delta
Fri, May 22 - Fri, May 29
PHL
Philadelphia
ONT
Ontario
₩489,600 Roundtrip, found 10 hours ago
₩489,600
Roundtrip
found 10 hours ago
Select Delta flight, departing Fri, May 22 from Philadelphia to Ontario, returning Fri, May 29, priced at ₩489,600 found 10 hours ago
Delta
Sat, May 23 - Fri, May 29
PHL
Philadelphia
ONT
Ontario
₩540,600 Roundtrip, found 10 hours ago
₩540,600
Roundtrip
found 10 hours ago
Select Delta flight, departing Sat, May 23 from Philadelphia to Ontario, returning Fri, May 29, priced at ₩540,600 found 10 hours ago
Delta
Thu, May 21 - Fri, May 29
PHL
Philadelphia
ONT
Ontario
₩542,200 Roundtrip, found 10 hours ago
₩542,200
Roundtrip
found 10 hours ago
Select Delta flight, departing Thu, May 21 from Philadelphia to Ontario, returning Fri, May 29, priced at ₩542,200 found 10 hours ago
Delta
Fri, May 22 - Tue, May 26
PHL
Philadelphia
ONT
Ontario
₩605,300 Roundtrip, found 10 hours ago
₩605,300
Roundtrip
found 10 hours ago
Select Delta flight, departing Fri, May 22 from Philadelphia to Ontario, returning Tue, May 26, priced at ₩605,300 found 10 hours ago
Alaska Airlines
Tue, May 26 - Wed, May 27
PHL
Philadelphia
ONT
Ontario
₩608,300 Roundtrip, found 10 hours ago
₩608,300
Roundtrip
found 10 hours ago
Select Alaska Airlines flight, departing Tue, May 26 from Philadelphia to Ontario, returning Wed, May 27, priced at ₩608,300 found 10 hours ago
Alaska Airlines
Sun, May 24 - Wed, May 27
PHL
Philadelphia
ONT
Ontario
₩611,300 Roundtrip, found 10 hours ago
₩611,300
Roundtrip
found 10 hours ago
Select Alaska Airlines flight, departing Sun, May 24 from Philadelphia to Ontario, returning Wed, May 27, priced at ₩611,300 found 10 hours ago
Delta
Tue, May 26 - Fri, May 29
PHL
Philadelphia
ONT
Ontario
₩630,800 Roundtrip, found 10 hours ago
₩630,800
Roundtrip
found 10 hours ago
Select Delta flight, departing Tue, May 26 from Philadelphia to Ontario, returning Fri, May 29, priced at ₩630,800 found 10 hours ago
United
Thu, May 14 - Thu, May 21
PHL
Philadelphia
ONT
Ontario
₩690,200 Roundtrip, found 2 hours ago
₩690,200
Roundtrip
found 2 hours ago
Select United flight, departing Thu, May 14 from Philadelphia to Ontario, returning Thu, May 21, priced at ₩690,200 found 2 hours ago
American Airlines
Sun, May 24 - Mon, May 25
PHL
Philadelphia
ONT
Ontario
₩758,600 Roundtrip, found 10 hours ago
₩758,600
Roundtrip
found 10 hours ago
Select American Airlines flight, departing Sun, May 24 from Philadelphia to Ontario, returning Mon, May 25, priced at ₩758,600 found 10 hours ago

Find the cheapest month to fly from Philadelphia (PHL) to Ontario (ONT)

March is typically the cheapest month to fly

From ₩204,997 - ₩733,790 per traveler.

Frequently asked questions

How much is a flight from PHL to Los Angeles - Ontario Intl. Airport (ONT)?
Start packing your suitcase, because round-trip journeys from PHL to Los Angeles - Ontario Intl. Airport (ONT) start from ₩425,000. That's based on fares listed within the last 7 days on Expedia for flights departing within the next year. Prices can rise quickly, so book today to secure the best deal. Prices and availability are subject to change. Additional terms apply.
Do I need to pay a cancellation fee if I cancel my flight from PHL to Ontario Airport?
Every air carrier has its own set of terms and conditions. If you do decide to cancel, follow the instructions on our Customer Service Portal.
How do I find cheap flights from PHL to Los Angeles - Ontario Intl. Airport (ONT) that have flexible change policies?
Many airlines offer the option to reschedule your flight without a change fee. All you pay is the difference between the original flight and the new flight. When you're searching for Philadelphia Airport to Ontario Airport flights, you'll see a "no change fees" filter for you to select.
How far is the flight from Philadelphia Intl. Airport (PHL) to ONT?
You'll be cruising at altitude for a while, as the flight distance between Philadelphia and Ontario is 3,800 kilometers. Put together a playlist of your favorite podcasts before you leave home to stay entertained during your flight.
Which airlines fly direct from Philadelphia Intl. Airport (PHL) to Los Angeles - Ontario Intl. Airport (ONT)?
Unfortunately, there are no airlines that directly fly between PHL and Ontario Airport. You'll have to book a flight with one or more stops.
Are Philadelphia Airport to Ontario Airport flight tickets cheaper when they're purchased at the last minute?
Last-minute planners can sometimes nab a bargain, with some of the cheapest airfares from PHL to Los Angeles - Ontario Intl. Airport (ONT) arising a few weeks before the departure date. If you'd rather plan ahead of time, Expedia compares and updates all the best flight deals continually — as early as a year in advance in some cases. It depends on the carrier though, as not every airline advertises prices so far in advance.

Travel information

Origin airport
Philadelphia Intl.
Destination airport
Los Angeles - Ontario Intl.
Airlines serving
Alaska Airlines, American Airlines, Delta, United
Roundtrip price
₩425,000
Distance
3759 km
Average flight time
9 hours 8 mins
*Available to Expedia members.