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

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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 September , October 2026

30 Sep - 21 Oct $ 273.00
ONT
Ontario
Frontier Airlines
2 STOPS
PHL
Philadelphia
PHL
Philadelphia
Frontier Airlines
2 STOPS
ONT
Ontario
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15 Sep - 06 Oct $ 520.00
ONT
Ontario
Alaska Airlines
1 STOPS
PHL
Philadelphia
PHL
Philadelphia
Alaska Airlines
1 STOPS
ONT
Ontario
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10 Sep - 12 Oct $ 1,185.00
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

15 Sep - 30 Sep $ 514.00
ONT
Ontario
Alaska Airlines
1 STOPS
PHL
Philadelphia
PHL
Philadelphia
Alaska Airlines
1 STOPS
ONT
Ontario
Pick dates
13 Sep - 30 Sep $ 547.00
ONT
Ontario
Alaska Airlines
1 STOPS
PHL
Philadelphia
PHL
Philadelphia
Alaska Airlines
1 STOPS
ONT
Ontario
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16 Sep - 30 Sep $ 714.00
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

11:45 AM - 5:10 AM
Frontier Airlines
2 Stops
16h 31m
ONT - PHL
$ 165
Kiwi
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5:00 AM - 10:05 AM
United Airlines
1 Stops
7h 50m
ONT - PHL
$ 329
Kiwi
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1:18 PM - 6:01 PM
United Airlines
1 Stops
7h 26m
ONT - PHL
$ 330
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.