$90 Cheap Frontier Airlines flights Philadelphia (PHL) to Ontario (ONT)

$90 Cheap Frontier Airlines flights Philadelphia (PHL) to Ontario (ONT)

Prices were available within the past 7 days and start at $90 for one-way flights and $180 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Mon, Dec 8 - Mon, Dec 15

PHL

Philadelphia

ONT

Ontario

$180 Roundtrip, found 9 hours ago

$180

Roundtrip

found 9 hours ago

Select Frontier Airlines flight, departing Mon, Dec 8 from Philadelphia to Ontario, returning Mon, Dec 15, priced at $180 found 9 hours ago

Sat, Nov 1 - Wed, Nov 19

PHL

Philadelphia

ONT

Ontario

$206 Roundtrip, found 14 hours ago

$206

Roundtrip

found 14 hours ago

Select Frontier Airlines flight, departing Sat, Nov 1 from Philadelphia to Ontario, returning Wed, Nov 19, priced at $206 found 14 hours ago

Sat, Nov 1 - Wed, Nov 5

PHL

Philadelphia

ONT

Ontario

$232 Roundtrip, found 8 hours ago

$232

Roundtrip

found 8 hours ago

Select Frontier Airlines flight, departing Sat, Nov 1 from Philadelphia to Ontario, returning Wed, Nov 5, priced at $232 found 8 hours ago

Thu, Nov 20 - Sat, Nov 22

PHL

Philadelphia

ONT

Ontario

$241 Roundtrip, found 1 hour ago

$241

Roundtrip

found 1 hour ago

Select Frontier Airlines flight, departing Thu, Nov 20 from Philadelphia to Ontario, returning Sat, Nov 22, priced at $241 found 1 hour ago

Thu, Nov 20 - Wed, Nov 26

PHL

Philadelphia

ONT

Ontario

$253 Roundtrip, found 17 hours ago

$253

Roundtrip

found 17 hours ago

Select Frontier Airlines flight, departing Thu, Nov 20 from Philadelphia to Ontario, returning Wed, Nov 26, priced at $253 found 17 hours ago

Fri, Dec 5 - Mon, Dec 15

PHL

Philadelphia

ONT

Ontario

$256 Roundtrip, found 6 hours ago

$256

Roundtrip

found 6 hours ago

Select Frontier Airlines flight, departing Fri, Dec 5 from Philadelphia to Ontario, returning Mon, Dec 15, priced at $256 found 6 hours ago