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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 July , August 2026

29 Jul - 17 Aug $ 344.00
ONT
Ontario
Frontier Airlines
1 STOPS
PHL
Philadelphia
PHL
Philadelphia
Frontier Airlines
1 STOPS
ONT
Ontario
Pick dates
29 Jul - 09 Aug $ 377.00
ONT
Ontario
Frontier Airlines
1 STOPS
PHL
Philadelphia
PHL
Philadelphia
Frontier Airlines
1 STOPS
ONT
Ontario
Pick dates
29 Jul - 07 Aug $ 442.00
ONT
Ontario
Frontier Airlines
1 STOPS
PHL
Philadelphia
PHL
Philadelphia
Frontier Airlines
1 STOPS
ONT
Ontario
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Last minute flights from Ontario to Philadelphia

29 Jul - 01 Aug $ 401.00
ONT
Ontario
Frontier Airlines
1 STOPS
PHL
Philadelphia
PHL
Philadelphia
Frontier Airlines
1 STOPS
ONT
Ontario
Pick dates
29 Jul - 01 Aug $ 422.00
ONT
Ontario
Frontier Airlines
1 STOPS
PHL
Philadelphia
PHL
Philadelphia
Frontier Airlines
1 STOPS
ONT
Ontario
Pick dates
29 Jul - 31 Jul $ 857.00
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

10:49 AM - 6:05 AM
Frontier Airlines
1 Stops
22h
ONT - PHL
$ 186
Kiwi
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8:17 AM - 3:00 PM
Frontier Airlines
1 Stops
8h 12m
ONT - PHL
$ 207
Kiwi
Pick dates
1:18 PM - 5:54 PM
United Airlines
1 Stops
7h 12m
ONT - PHL
$ 330
Kiwi
Pick dates

How to find the cheapest flight from Ontario (ONT) to Philadelphia (PHL)

Related info for your journey
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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.