$193 Cheap Frontier Airlines flights Philadelphia (PHL) to Ontario (ONT)

$193 Cheap Frontier Airlines flights Philadelphia (PHL) to Ontario (ONT)

Prices were available within the past 7 days and start at $193 for one-way flights and $326 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Sat, Jul 19 - Tue, Jul 22

PHL

Philadelphia

ONT

Ontario

$326 Roundtrip, found 15 hours ago

$326

Roundtrip

found 15 hours ago

Select Frontier Airlines flight, departing Sat, Jul 19 from Philadelphia to Ontario, returning Tue, Jul 22, priced at $326 found 15 hours ago

Thu, Dec 4 - Wed, Dec 10

PHL

Philadelphia

ONT

Ontario

$364 Roundtrip, found 6 days ago

$364

Roundtrip

found 6 days ago

Select Frontier Airlines flight, departing Thu, Dec 4 from Philadelphia to Ontario, returning Wed, Dec 10, priced at $364 found 6 days ago

Thu, Dec 4 - Wed, Dec 10

PHL

Philadelphia

ONT

Ontario

$373 Roundtrip, found 6 days ago

$373

Roundtrip

found 6 days ago

Select Frontier Airlines flight, departing Thu, Dec 4 from Philadelphia to Ontario, returning Wed, Dec 10, priced at $373 found 6 days ago