$172 Cheap Frontier Airlines flights Ontario (ONT) to Philadelphia (PHL)

$172 Cheap Frontier Airlines flights Ontario (ONT) to Philadelphia (PHL)

Prices were available within the past 7 days and start at $172 for one-way flights and $368 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Thu, Nov 27 - Sat, Nov 29

ONT

Ontario

PHL

Philadelphia

$368 Roundtrip, found 2 days ago

$368

Roundtrip

found 2 days ago

Select Frontier Airlines flight, departing Thu, Nov 27 from Ontario to Philadelphia, returning Sat, Nov 29, priced at $368 found 2 days ago

Wed, Nov 12 - Fri, Nov 21

ONT

Ontario

PHL

Philadelphia

$387 Roundtrip, found 3 hours ago

$387

Roundtrip

found 3 hours ago

Select Frontier Airlines flight, departing Wed, Nov 12 from Ontario to Philadelphia, returning Fri, Nov 21, priced at $387 found 3 hours ago

Sun, Nov 16 - Fri, Nov 21

ONT

Ontario

PHL

Philadelphia

$412 Roundtrip, found 3 hours ago

$412

Roundtrip

found 3 hours ago

Select Frontier Airlines flight, departing Sun, Nov 16 from Ontario to Philadelphia, returning Fri, Nov 21, priced at $412 found 3 hours ago

Fri, Nov 14 - Mon, Nov 17

ONT

Ontario

PHL

Philadelphia

$432 Roundtrip, found 3 hours ago

$432

Roundtrip

found 3 hours ago

Select Frontier Airlines flight, departing Fri, Nov 14 from Ontario to Philadelphia, returning Mon, Nov 17, priced at $432 found 3 hours ago

Sun, Nov 23 - Sat, Nov 29

ONT

Ontario

PHL

Philadelphia

$447 Roundtrip, found 2 days ago

$447

Roundtrip

found 2 days ago

Select Frontier Airlines flight, departing Sun, Nov 23 from Ontario to Philadelphia, returning Sat, Nov 29, priced at $447 found 2 days ago

Mon, Nov 24 - Sat, Nov 29

ONT

Ontario

PHL

Philadelphia

$547 Roundtrip, found 2 days ago

$547

Roundtrip

found 2 days ago

Select Frontier Airlines flight, departing Mon, Nov 24 from Ontario to Philadelphia, returning Sat, Nov 29, priced at $547 found 2 days ago

Thu, Nov 27 - Sun, Nov 30

ONT

Ontario

PHL

Philadelphia

$789 Roundtrip, found 2 days ago

$789

Roundtrip

found 2 days ago

Select Frontier Airlines flight, departing Thu, Nov 27 from Ontario to Philadelphia, returning Sun, Nov 30, priced at $789 found 2 days ago

Sun, Nov 23 - Sun, Nov 30

ONT

Ontario

PHL

Philadelphia

$868 Roundtrip, found 2 days ago

$868

Roundtrip

found 2 days ago

Select Frontier Airlines flight, departing Sun, Nov 23 from Ontario to Philadelphia, returning Sun, Nov 30, priced at $868 found 2 days ago