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

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0 Children (2~11)
0 Infants (0~2)
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How to find the cheapest flight from Ontario (ONT) to Philadelphia (PHL)

How to find the cheapest flight from Ontario (ONT) to Philadelphia (PHL)
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How to find the cheapest flight from Ontario (ONT) to Philadelphia (PHL)
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How to find the cheapest flight from Ontario (ONT) to Philadelphia (PHL)
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Cheap flights from Ontario to Philadelphia in April , May 2026

27 Apr - 07 May $ 165.00
ONT
Ontario
Frontier Airlines
1 STOPS
PHL
Philadelphia
PHL
Philadelphia
Frontier Airlines
1 STOPS
ONT
Ontario
Pick dates
11 Apr - 05 May $ 740.00
ONT
Ontario
Alaska Airlines
1 STOPS
PHL
Philadelphia
PHL
Philadelphia
Alaska Airlines
1 STOPS
ONT
Ontario
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11 Apr - 06 May $ 753.00
ONT
Ontario
Alaska Airlines
1 STOPS
PHL
Philadelphia
PHL
Philadelphia
Alaska Airlines
1 STOPS
ONT
Ontario
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Last minute flights from Ontario to Philadelphia

27 Apr - 01 May $ 172.00
ONT
Ontario
Frontier Airlines
1 STOPS
PHL
Philadelphia
PHL
Philadelphia
Frontier Airlines
1 STOPS
ONT
Ontario
Pick dates
10 Apr - 30 Apr $ 660.00
ONT
Ontario
United Airlines
1 STOPS
PHL
Philadelphia
PHL
Philadelphia
United Airlines
1 STOPS
ONT
Ontario
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10 Apr - 30 Apr $ 785.00
ONT
Ontario
United Airlines
1 STOPS
PHL
Philadelphia
PHL
Philadelphia
United Airlines
1 STOPS
ONT
Ontario
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One-way flights to Philadelphia from Ontario

5:33 PM - 11:59 PM
Frontier Airlines
1 Stops
9h 1m
ONT - PHL
$ 103
Kiwi
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6:00 AM - 8:40 AM
United Airlines
1 Stops
8h 15m
ONT - PHL
$ 472
Kiwi
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1:43 PM - 5:59 PM
United Airlines
1 Stops
7h
ONT - PHL
$ 476
Kiwi
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How to find the cheapest flight from Ontario (ONT) to Philadelphia (PHL)

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How to find the cheapest flight from Ontario (ONT) to Philadelphia (PHL)
Some placeholder content for the first accordion panel. This panel is shown by default, thanks to the .show class.
How to find the cheapest flight from Ontario (ONT) to Philadelphia (PHL)
Some placeholder content for the first accordion panel. This panel is shown by default, thanks to the .show class.