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S$273 Cheap Flights from Philadelphia to Ontario Intl. Airport

View S$273 flight on Sat, 22 Aug, 2026Opens in a new window

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

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Cheap Flights from Philadelphia to Ontario Intl. Airport (PHL-ONT)

Prices were available within the past 7 days and start at S$273 for one-way flights and S$422 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Delta
Tue, 10 Nov - Thu, 26 Nov
PHL
Philadelphia
ONT
Ontario
S$422 Return, found 15 hours ago
S$422
Return
found 15 hours ago
Select Delta flight, departing Tue, 10 Nov from Philadelphia to Ontario, returning Thu, 26 Nov, priced at S$422 found 15 hours ago
Delta
Sun, 8 Nov - Thu, 26 Nov
PHL
Philadelphia
ONT
Ontario
S$436 Return, found 15 hours ago
S$436
Return
found 15 hours ago
Select Delta flight, departing Sun, 8 Nov from Philadelphia to Ontario, returning Thu, 26 Nov, priced at S$436 found 15 hours ago
Delta
Tue, 10 Nov - Mon, 16 Nov
PHL
Philadelphia
ONT
Ontario
S$446 Return, found 15 hours ago
S$446
Return
found 15 hours ago
Select Delta flight, departing Tue, 10 Nov from Philadelphia to Ontario, returning Mon, 16 Nov, priced at S$446 found 15 hours ago
Alaska Airlines
Fri, 11 Sept - Sat, 26 Sept
PHL
Philadelphia
ONT
Ontario
S$456 Return, found 15 hours ago
S$456
Return
found 15 hours ago
Select Alaska Airlines flight, departing Fri, 11 Sept from Philadelphia to Ontario, returning Sat, 26 Sept, priced at S$456 found 15 hours ago
Delta
Sun, 8 Nov - Mon, 16 Nov
PHL
Philadelphia
ONT
Ontario
S$460 Return, found 15 hours ago
S$460
Return
found 15 hours ago
Select Delta flight, departing Sun, 8 Nov from Philadelphia to Ontario, returning Mon, 16 Nov, priced at S$460 found 15 hours ago
Delta
Fri, 25 Dec - Fri, 8 Jan
PHL
Philadelphia
ONT
Ontario
S$468 Return, found 15 hours ago
S$468
Return
found 15 hours ago
Select Delta flight, departing Fri, 25 Dec from Philadelphia to Ontario, returning Fri, 8 Jan, priced at S$468 found 15 hours ago
Delta
Sun, 8 Nov - Sun, 15 Nov
PHL
Philadelphia
ONT
Ontario
S$474 Return, found 15 hours ago
S$474
Return
found 15 hours ago
Select Delta flight, departing Sun, 8 Nov from Philadelphia to Ontario, returning Sun, 15 Nov, priced at S$474 found 15 hours ago
United
Sat, 22 Aug - Sat, 29 Aug
PHL
Philadelphia
ONT
Ontario
S$475 Return, found 5 days ago
S$475
Return
found 5 days ago
Select United flight, departing Sat, 22 Aug from Philadelphia to Ontario, returning Sat, 29 Aug, priced at S$475 found 5 days ago
Delta
Thu, 20 Aug - Sat, 5 Sept
PHL
Philadelphia
ONT
Ontario
S$476 Return, found 15 hours ago
S$476
Return
found 15 hours ago
Select Delta flight, departing Thu, 20 Aug from Philadelphia to Ontario, returning Sat, 5 Sept, priced at S$476 found 15 hours ago
Alaska Airlines
Wed, 9 Sept - Sat, 26 Sept
PHL
Philadelphia
ONT
Ontario
S$487 Return, found 15 hours ago
S$487
Return
found 15 hours ago
Select Alaska Airlines flight, departing Wed, 9 Sept from Philadelphia to Ontario, returning Sat, 26 Sept, priced at S$487 found 15 hours ago
Delta
Tue, 10 Nov - Thu, 12 Nov
PHL
Philadelphia
ONT
Ontario
S$492 Return, found 15 hours ago
S$492
Return
found 15 hours ago
Select Delta flight, departing Tue, 10 Nov from Philadelphia to Ontario, returning Thu, 12 Nov, priced at S$492 found 15 hours ago
American Airlines
Sat, 22 Aug - Sat, 29 Aug
PHL
Philadelphia
ONT
Ontario
S$527 Return, found 5 days ago
S$527
Return
found 5 days ago
Select American Airlines flight, departing Sat, 22 Aug from Philadelphia to Ontario, returning Sat, 29 Aug, priced at S$527 found 5 days ago

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 S$422. 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 kilometres. Put together a playlist of your favourite 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
Ontario Intl. Airport
Return price
S$422
Distance
3759 km
Average flight time
9 hours 12 mins

Book with confidence

Perfect flights from Philadelphia to Ontario Intl. Airport

Your Journey from Philadelphia to Ontario Intl. Airport

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Choosing Your Ideal Flight

With Expedia, you have access to a wide range of airlines, including United, American Airlines, Delta, Alaska Airlines. Our selection of flights from Philadelphia Intl. to Ontario Intl. Airport caters to every traveler's requirements, ensuring your journey aligns with your schedule. With options from 20 airlines, you're bound to find the perfect flight.
 

Maximizing Value with Philadelphia to Ontario Intl. Airport Flights

Experience the joy of finding cheap flights from Philadelphia Intl. to Ontario Intl. Airport that fit your budget. Keep an eye out for our special deals and discounts, and check our flexible one-way fares from S$273 and roundtrip prices from S$422*.
 

Pre-Flight Essentials

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Experience the Vibrant Ontario Intl. Airport

Picture yourself stepping off the plane in Ontario Intl. Airport and immersing yourself in the unique atmosphere of . From local markets to cultural festivals, each city offers its distinct charm. Make the most of your trip by exploring local attractions and indulging in the local cuisine. With Expedia, explore all this and more, tailored to your budget.
 

Added Convenience on Your Philadelphia to Ontario Intl. Airport Flight

Traveling with Expedia is more than just a flight. We offer details about in-flight amenities, baggage policies, and more to ensure a smooth and hassle-free journey. Choose from our variety of airlines and embark on a memorable journey from Philadelphia to Ontario Intl. Airport.
 

Beyond the Flight – Exploring Ontario Intl. Airport

With Expedia, your adventure extends beyond the flight. Explore Ontario Intl. Airport at your own pace by renting a car or booking a hotel. Discover hidden gems off the beaten path and create unforgettable memories.
 

Book Your Flight from Philadelphia to Ontario Intl. Airport with Confidence

Planning your next great adventure is a breeze with Expedia. Our user-friendly platform, unbeatable prices, and round-the-clock customer support make your travel experience seamless and stress-free. Embark on your journey from Philadelphia to Ontario Intl. Airport with confidence. Book your travel arrangements with Expedia today.
 
*Note: Prices may vary based on availability and are subject to change.
Perfect flights from Philadelphia to Ontario Intl. Airport

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