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

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0 Children (2~11)
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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 October , November 2026

31 Oct - 27 Nov $ 394.00
ONT
Ontario
Frontier Airlines
2 STOPS
PHL
Philadelphia
PHL
Philadelphia
Frontier Airlines
1 STOPS
ONT
Ontario
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28 Oct - 10 Nov $ 730.00
ONT
Ontario
Frontier Airlines
1 STOPS
PHL
Philadelphia
PHL
Philadelphia
Frontier Airlines
1 STOPS
ONT
Ontario
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24 Oct - 10 Nov $ 754.00
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

28 Oct - 31 Oct $ 509.00
ONT
Ontario
Frontier Airlines
2 STOPS
PHL
Philadelphia
PHL
Philadelphia
Frontier Airlines
1 STOPS
ONT
Ontario
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27 Oct - 31 Oct $ 740.00
ONT
Ontario
United Airlines
1 STOPS
PHL
Philadelphia
PHL
Philadelphia
United Airlines
1 STOPS
ONT
Ontario
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29 Oct - 31 Oct $ 834.00
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

1:22 PM - 5:37 PM
United Airlines
1 Stops
6h 58m
ONT - PHL
$ 360
Kiwi
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1:24 PM - 5:37 PM
United Airlines
1 Stops
6h 56m
ONT - PHL
$ 362
Kiwi
Pick dates
1:24 PM - 5:37 PM
United Airlines
1 Stops
6h 56m
ONT - PHL
$ 450
Kiwi
Pick dates

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.