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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 January , February 2026

31 Jan - 15 Feb $ 253.00
ONT
Ontario
Frontier Airlines
2 STOPS
PHL
Philadelphia
PHL
Philadelphia
Frontier Airlines
1 STOPS
ONT
Ontario
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19 Jan - 02 Feb $ 799.00
ONT
Ontario
Alaska Airlines
1 STOPS
PHL
Philadelphia
PHL
Philadelphia
Alaska Airlines
1 STOPS
ONT
Ontario
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19 Jan - 04 Feb $ 810.00
ONT
Ontario
Hawaiian Airlines
1 STOPS
PHL
Philadelphia
PHL
Philadelphia
Hawaiian Airlines
2 STOPS
ONT
Ontario
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Last minute flights from Ontario to Philadelphia

26 Jan - 31 Jan $ 348.00
ONT
Ontario
Frontier Airlines
2 STOPS
PHL
Philadelphia
PHL
Philadelphia
Frontier Airlines
2 STOPS
ONT
Ontario
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16 Jan - 01 Feb $ 1,025.00
ONT
Ontario
Alaska Airlines
1 STOPS
PHL
Philadelphia
PHL
Philadelphia
Alaska Airlines
1 STOPS
ONT
Ontario
Pick dates
19 Jan - 01 Feb $ 1,050.00
ONT
Ontario
Alaska Airlines
1 STOPS
PHL
Philadelphia
PHL
Philadelphia
Alaska Airlines
1 STOPS
ONT
Ontario
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One-way flights to Philadelphia from Ontario

7:15 AM - 7:54 PM
Frontier Airlines
2 Stops
12h 17m
ONT - PHL
$ 155
Kiwi
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7:15 AM - 2:01 PM
Spirit Airlines
3 Stops
30h 34m
ONT - PHL
$ 285
Kiwi
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1:24 PM - 5:55 PM
United Airlines
1 Stops
7h 6m
ONT - PHL
$ 449
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)
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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.