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Cheap Flights from Ontario to Philadelphia starting at S$ 96

We've found these cheap flights for you. You can book one-way or return flight tickets.

  • One way
  • Round-trip

Crossed out prices are calculated based on the average price of the corresponding route on Trip.com.

Cheapest time to fly from Ontario to Philadelphia

We monitor flight fares to help you find the best deals effortlessly

Displayed prices are calculated based on the lowest average weekly prices of the corresponding route on Trip.com.
Cheapest Airlines flying from Ontario to Philadelphia

Compare prices, find the option that best suits your travel needs, and enjoy a comfortable journey with a trusted airline.

Frontier Airlines
From S$ 96
Southwest Airlines
From S$ 126
Delta Air Lines
From S$ 164
Alaska Airlines
From S$ 192
United Airlines
From S$ 194
American Airlines
From S$ 357
ANA airlines

Find more flights and airlines

Alternative Routes from Ontario to Philadelphia

Searching for potential routes that might be cheaper and faster? Check out these alternative flights from Ontario to Philadelphia.

  • Cheapest
    Frontier Airlines
    ONT
    00:59
    9h 5m
    1 transfer
    PHL
    13:04
    Ontario International Airport - Philadelphia International Airport
    Tue, Apr 9Frontier Airlines
    S$ 96
  • Frontier Airlines
    ONT
    00:59
    13h 44m
    2 transfer
    TTN
    17:43
    Ontario International Airport - Trenton Mercer Airport
    Wed, Apr 10Frontier Airlines
    S$ 111
  • Frontier Airlines
    ONT
    00:59
    13h 44m
    2 transfer
    TTN
    17:43
    Ontario International Airport - Trenton Mercer Airport
    Wed, Apr 10Frontier Airlines
    S$ 111
    Find More Flights

Frequently Asked Questions

  • When to buy flight tickets from Ontario (ONT) to Philadelphia (PHL) the cheapest?

    Airlines adjust prices for flights from Ontario to Philadelphia based on the date and time of your booking. By analyzing data from all airlines, on Trip.com, you can find the cheapest flight prices on Tuesdays, Wednesdays, and Saturdays.
  • How much is a flight from Ontario (ONT) to Philadelphia (PHL) cost?

    According to Trip.com's data, the lowest price is around S$ 609.
  • What's the most popular airline for direct flights from Ontario (ONT) to Philadelphia (PHL)?

    Spirit Airlines operates 2 direct flights from Ontario (ONT) to Philadelphia (PHL).
  • How many airports in Philadelphia?

Find cheapest flight ticket from Ontario to Philadelphia

Cheapest direct flight price

S$ 95

Cheapest return ticket price

S$ 292

Cheapest month

April

Peak season for travel

April