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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 March , April 2026

31 Mar - 16 Apr $ 198.00
ONT
Ontario
Frontier Airlines
2 STOPS
PHL
Philadelphia
PHL
Philadelphia
Frontier Airlines
1 STOPS
ONT
Ontario
Pick dates
13 Mar - 07 Apr $ 810.00
ONT
Ontario
Alaska Airlines
1 STOPS
PHL
Philadelphia
PHL
Philadelphia
Alaska Airlines
1 STOPS
ONT
Ontario
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12 Mar - 01 Apr $ 1,193.00
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

26 Mar - 31 Mar $ 676.00
ONT
Ontario
United Airlines
1 STOPS
PHL
Philadelphia
PHL
Philadelphia
United Airlines
1 STOPS
ONT
Ontario
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13 Mar - 31 Mar $ 814.00
ONT
Ontario
Alaska Airlines
1 STOPS
PHL
Philadelphia
PHL
Philadelphia
Alaska Airlines
1 STOPS
ONT
Ontario
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06 Mar - 31 Mar $ 8,785.00
ONT
Ontario
Alaska Airlines
2 STOPS
PHL
Philadelphia
PHL
Philadelphia
Alaska Airlines
1 STOPS
ONT
Ontario
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One-way flights to Philadelphia from Ontario

6:15 AM - 7:00 PM
Frontier Airlines
2 Stops
12h 23m
ONT - PHL
$ 111
Kiwi
Pick dates
1:50 PM - 5:57 PM
United Airlines
1 Stops
6h 42m
ONT - PHL
$ 459
Kiwi
Pick dates
1:50 PM - 5:57 PM
United Airlines
1 Stops
6h 42m
ONT - PHL
$ 538
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.