$149 Cheap Frontier Airlines flights Philadelphia (PHL) to Ontario (ONT)

$149 Cheap Frontier Airlines flights Philadelphia (PHL) to Ontario (ONT)

Prices were available within the past 7 days and start at $149 for one-way flights and $204 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Thu, Oct 23 - Wed, Oct 29

PHL

Philadelphia

ONT

Ontario

$204 Roundtrip, found 9 hours ago

$204

Roundtrip

found 9 hours ago

Select Frontier Airlines flight, departing Thu, Oct 23 from Philadelphia to Ontario, returning Wed, Oct 29, priced at $204 found 9 hours ago

Fri, Oct 31 - Sun, Nov 9

PHL

Philadelphia

ONT

Ontario

$223 Roundtrip, found 3 days ago

$223

Roundtrip

found 3 days ago

Select Frontier Airlines flight, departing Fri, Oct 31 from Philadelphia to Ontario, returning Sun, Nov 9, priced at $223 found 3 days ago

Thu, Oct 9 - Sun, Oct 12

PHL

Philadelphia

ONT

Ontario

$380 Roundtrip, found 6 days ago

$380

Roundtrip

found 6 days ago

Select Frontier Airlines flight, departing Thu, Oct 9 from Philadelphia to Ontario, returning Sun, Oct 12, priced at $380 found 6 days ago

Thu, Oct 9 - Sun, Oct 12

PHL

Philadelphia

ONT

Ontario

$419 Roundtrip, found 6 days ago

$419

Roundtrip

found 6 days ago

Select Frontier Airlines flight, departing Thu, Oct 9 from Philadelphia to Ontario, returning Sun, Oct 12, priced at $419 found 6 days ago