$74 Cheap Frontier Airlines flights Philadelphia (PHL) to Ontario (ONT)

$74 Cheap Frontier Airlines flights Philadelphia (PHL) to Ontario (ONT)

Prices were available within the past 7 days and start at $74 for one-way flights and $171 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Fri, Feb 27 - Wed, Mar 4

PHL

Philadelphia

ONT

Ontario

$171 Roundtrip, found 1 day ago

$171

Roundtrip

found 1 day ago

Select Frontier Airlines flight, departing Fri, Feb 27 from Philadelphia to Ontario, returning Wed, Mar 4, priced at $171 found 1 day ago

Fri, Jan 2 - Mon, Jan 12

PHL

Philadelphia

ONT

Ontario

$183 Roundtrip, found 3 hours ago

$183

Roundtrip

found 3 hours ago

Select Frontier Airlines flight, departing Fri, Jan 2 from Philadelphia to Ontario, returning Mon, Jan 12, priced at $183 found 3 hours ago

Thu, Jan 15 - Wed, Jan 21

PHL

Philadelphia

ONT

Ontario

$188 Roundtrip, found 2 days ago

$188

Roundtrip

found 2 days ago

Select Frontier Airlines flight, departing Thu, Jan 15 from Philadelphia to Ontario, returning Wed, Jan 21, priced at $188 found 2 days ago

Mon, Jan 5 - Mon, Jan 12

PHL

Philadelphia

ONT

Ontario

$192 Roundtrip, found 10 hours ago

$192

Roundtrip

found 10 hours ago

Select Frontier Airlines flight, departing Mon, Jan 5 from Philadelphia to Ontario, returning Mon, Jan 12, priced at $192 found 10 hours ago

Thu, Jan 1 - Tue, Jan 6

PHL

Philadelphia

ONT

Ontario

$194 Roundtrip, found 3 days ago

$194

Roundtrip

found 3 days ago

Select Frontier Airlines flight, departing Thu, Jan 1 from Philadelphia to Ontario, returning Tue, Jan 6, priced at $194 found 3 days ago

Mon, Feb 2 - Thu, Feb 5

PHL

Philadelphia

ONT

Ontario

$198 Roundtrip, found 2 days ago

$198

Roundtrip

found 2 days ago

Select Frontier Airlines flight, departing Mon, Feb 2 from Philadelphia to Ontario, returning Thu, Feb 5, priced at $198 found 2 days ago