$118 Cheap Frontier Airlines flights Philadelphia (PHL) to Ontario (ONT)

$118 Cheap Frontier Airlines flights Philadelphia (PHL) to Ontario (ONT)

Prices were available within the past 7 days and start at $118 for one-way flights and $209 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Sat, Jul 12 - Thu, Aug 7

PHL

Philadelphia

ONT

Ontario

$209 Roundtrip, found 6 days ago

$209

Roundtrip

found 6 days ago

Select Frontier Airlines flight, departing Sat, Jul 12 from Philadelphia to Ontario, returning Thu, Aug 7, priced at $209 found 6 days ago

Sat, Jul 12 - Tue, Aug 5

PHL

Philadelphia

ONT

Ontario

$211 Roundtrip, found 6 days ago

$211

Roundtrip

found 6 days ago

Select Frontier Airlines flight, departing Sat, Jul 12 from Philadelphia to Ontario, returning Tue, Aug 5, priced at $211 found 6 days ago

Sat, Jul 12 - Tue, Aug 12

PHL

Philadelphia

ONT

Ontario

$215 Roundtrip, found 6 days ago

$215

Roundtrip

found 6 days ago

Select Frontier Airlines flight, departing Sat, Jul 12 from Philadelphia to Ontario, returning Tue, Aug 12, priced at $215 found 6 days ago

Sat, Aug 9 - Sat, Aug 16

PHL

Philadelphia

ONT

Ontario

$225 Roundtrip, found 2 hours ago

$225

Roundtrip

found 2 hours ago

Select Frontier Airlines flight, departing Sat, Aug 9 from Philadelphia to Ontario, returning Sat, Aug 16, priced at $225 found 2 hours ago

Sat, Jul 12 - Fri, Aug 8

PHL

Philadelphia

ONT

Ontario

$239 Roundtrip, found 6 days ago

$239

Roundtrip

found 6 days ago

Select Frontier Airlines flight, departing Sat, Jul 12 from Philadelphia to Ontario, returning Fri, Aug 8, priced at $239 found 6 days ago

Sat, Jul 19 - Tue, Jul 22

PHL

Philadelphia

ONT

Ontario

$240 Roundtrip, found 6 hours ago

$240

Roundtrip

found 6 hours ago

Select Frontier Airlines flight, departing Sat, Jul 19 from Philadelphia to Ontario, returning Tue, Jul 22, priced at $240 found 6 hours ago