CA $206 Cheap Flights from Ontario (ONT) to Philadelphia (PHL)

View CA $206 flight on Tue, Sep. 30, 2025Opens in a new window

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

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Cheap flights from Ontario (ONT) to Philadelphia (PHL)

Prices were available within the past 7 days and start at CA $206 for one-way flights and CA $478 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Delta
Sat, Aug. 30 - Sun, Aug. 31
ONT
Ontario
PHL
Philadelphia
CA $478 Roundtrip, found 6 days ago
CA $478
Roundtrip
found 6 days ago
Select Delta flight, departing Sat, Aug. 30 from Ontario to Philadelphia, returning Sun, Aug. 31, priced at CA $478 found 6 days ago
Delta
Sat, Aug. 30 - Wed, Sep. 3
ONT
Ontario
PHL
Philadelphia
CA $595 Roundtrip, found 6 days ago
CA $595
Roundtrip
found 6 days ago
Select Delta flight, departing Sat, Aug. 30 from Ontario to Philadelphia, returning Wed, Sep. 3, priced at CA $595 found 6 days ago
Delta
Sat, Aug. 30 - Tue, Sep. 2
ONT
Ontario
PHL
Philadelphia
CA $624 Roundtrip, found 6 days ago
CA $624
Roundtrip
found 6 days ago
Select Delta flight, departing Sat, Aug. 30 from Ontario to Philadelphia, returning Tue, Sep. 2, priced at CA $624 found 6 days ago
United
Sun, Aug. 31 - Thu, Sep. 4
ONT
Ontario
PHL
Philadelphia
CA $733 Roundtrip, found 6 days ago
CA $733
Roundtrip
found 6 days ago
Select United flight, departing Sun, Aug. 31 from Ontario to Philadelphia, returning Thu, Sep. 4, priced at CA $733 found 6 days ago
Delta
Mon, Sep. 1 - Wed, Sep. 3
ONT
Ontario
PHL
Philadelphia
CA $741 Roundtrip, found 6 days ago
CA $741
Roundtrip
found 6 days ago
Select Delta flight, departing Mon, Sep. 1 from Ontario to Philadelphia, returning Wed, Sep. 3, priced at CA $741 found 6 days ago
Delta
Mon, Sep. 1 - Tue, Sep. 2
ONT
Ontario
PHL
Philadelphia
CA $770 Roundtrip, found 6 days ago
CA $770
Roundtrip
found 6 days ago
Select Delta flight, departing Mon, Sep. 1 from Ontario to Philadelphia, returning Tue, Sep. 2, priced at CA $770 found 6 days ago
Delta
Tue, Aug. 26 - Sat, Aug. 30
ONT
Ontario
PHL
Philadelphia
CA $804 Roundtrip, found 6 days ago
CA $804
Roundtrip
found 6 days ago
Select Delta flight, departing Tue, Aug. 26 from Ontario to Philadelphia, returning Sat, Aug. 30, priced at CA $804 found 6 days ago
American Airlines
Fri, Aug. 29 - Mon, Sep. 1
ONT
Ontario
PHL
Philadelphia
CA $939 Roundtrip, found 6 days ago
CA $939
Roundtrip
found 6 days ago
Select American Airlines flight, departing Fri, Aug. 29 from Ontario to Philadelphia, returning Mon, Sep. 1, priced at CA $939 found 6 days ago
JetBlue Airways
Fri, Aug. 29 - Mon, Sep. 1
ONT
Ontario
PHL
Philadelphia
CA $1,027 Roundtrip, found 6 days ago
CA $1,027
Roundtrip
found 6 days ago
Select JetBlue Airways flight, departing Fri, Aug. 29 from Ontario to Philadelphia, returning Mon, Sep. 1, priced at CA $1,027 found 6 days ago
Alaska Airlines
Fri, Aug. 29 - Mon, Sep. 1
ONT
Ontario
PHL
Philadelphia
CA $1,677 Roundtrip, found 6 days ago
CA $1,677
Roundtrip
found 6 days ago
Select Alaska Airlines flight, departing Fri, Aug. 29 from Ontario to Philadelphia, returning Mon, Sep. 1, priced at CA $1,677 found 6 days ago

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

October is typically the cheapest month to fly

From CA $191 - CA $575 per traveller.

Graph displaying average flight prices per month

Flight from Ontario to Philadelphia (ONT - PHL) route information
Origin airport
Los Angeles - Ontario Intl.
Destination airport
Philadelphia Intl.
Roundtrip price
CA $478
Distance
3759 km

Los Angeles to Philadelphia Flights

The easy way to book your flights from Ontario to Philadelphia 

With Expedia, it’s simple to find and book flights to Philadelphia from Ontario whether you’re traveling for business or pleasure. Enter your travel dates, hit search, and choose your flight from 20 airlines that cover this route. There are nonstop flights to Philadelphia Intl., too.  

Choose your preferred carrier and cabin class with the advanced search tool and select your ideal departure time. Then, if you want, you can see just nonstop or refundable flights. And if you’re traveling last minute, just enter the date to check out flights from Ontario to Philadelphia today, tomorrow, or this week.  

 

Save dollars with cheap flights from Los Angeles - Ontario Intl., ONT to Philadelphia Intl., PHL 

Sort your search results by price to find great deals on your flight from Ontario to Philadelphia—you get all your cheapest options first. Grab yourself a bargain now—the lowest price on flights to Philadelphia from Ontario currently is just CA $478 rising to CA $1,677.  

Here are more money-saving tips: 

  • Fly in August when flight prices are normally at their lowest 
  • Book about a month to 6 weeks before you travel for the best prices to Philadelphia  
  • Avoid peak season and weekends when flights can cost more
  • Early morning and late-night flights are sometimes cheaper, so try varying your travel times 
  • One surefire way to save money on your flight is to book your flight and hotel together with Expedia. Sometimes, the savings are so large that the flight is basically free! 

 

Reasons to choose Expedia for your flight to Philadelphia from Ontario 

Whatever your destination, budget, or reason to travel, in just one quick search, you can choose from loads of flights, airlines, and cabin classes. The filters make it quick and easy to find your ideal flights, and if you choose one of the flexible options, you won’t be charged to change your flight. So book your flight to Philadelphia with Expedia today.

Frequently asked questions

How much is a flight from Los Angeles - Ontario Intl. Airport (ONT) to Philadelphia Intl. Airport (PHL)?
If you're planning on travelling between ONT and PHL, round-trip flights start from CA $478. This figure is based on fares advertised within the last 7 days on Expedia for flights departing within the next year, so don't let a good deal slip through your fingers. Book today and save yourself both money and time. Prices and availability are subject to change. Additional terms apply.
Do I need to pay a cancellation fee if I cancel my flight from Los Angeles - Ontario Intl. Airport (ONT) to Philadelphia Intl. Airport (PHL)?
Most flights can be cancelled online, but whether you incur a fee differs between airlines. If you do need to cancel your trip, follow the easy instructions in the Customer Service Portal.
How do I find cheap flights from ONT to PHL that have flexible change policies?
Flights from Ontario Airport to PHL offering flexible change policies are available with many airlines. Simply use our "No change fees" filter when searching. You'll only need to pay the cost difference between the two flights, with no additional fees to worry about.
How many hours is the flight from Los Angeles - Ontario Intl. Airport (ONT) to Philadelphia Airport?
The average flight between Ontario Airport and PHL is 6 hours and 11 minutes. If you're travelling with kids, it's always a good idea to pack a few healthy snacks in your hand luggage.
How far is the flight from ONT to PHL?
The flight distance between Los Angeles - Ontario Intl. Airport (ONT) and Philadelphia Intl. Airport (PHL) is 3,800 kilometres. Bring along a drink, a snack and a few good podcasts. Keep yourself busy in the air and the hours will fly by.
Which airlines fly direct from Los Angeles - Ontario Intl. Airport (ONT) to PHL?
Unfortunately, there are no airlines that fly directly between Ontario Airport and Philadelphia Intl. Airport (PHL). You'll need to book a flight with one or more stops.
Are ONT to PHL flight tickets cheaper when they're purchased at the last minute?
Airline tickets from Los Angeles - Ontario Intl. Airport (ONT) to PHL are available up to 12 months prior to departure on Expedia. And although you may occasionally score great last-minute deal, it's not something you should bank on. Also, booking your flights ahead of time means you'll have more choices — and you can avoid getting trapped in the dreaded middle seat! We frequently update our fares to make sure you get the biggest bargains, so keep checking in for all the latest specials.

Explore a world of travel with Expedia

Ontario nearby Airports

Los Angeles

Los Angeles Intl. to Philadelphia
CA $235.85
*Available to Expedia members.