$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 $242 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Wed, Nov 26 - Fri, Dec 5

PHL

Philadelphia

ONT

Ontario

$242 Roundtrip, found 5 days ago

$242

Roundtrip

found 5 days ago

Select Frontier Airlines flight, departing Wed, Nov 26 from Philadelphia to Ontario, returning Fri, Dec 5, priced at $242 found 5 days ago

Thu, Dec 18 - Mon, Jan 5

PHL

Philadelphia

ONT

Ontario

$280 Roundtrip, found 22 hours ago

$280

Roundtrip

found 22 hours ago

Select Frontier Airlines flight, departing Thu, Dec 18 from Philadelphia to Ontario, returning Mon, Jan 5, priced at $280 found 22 hours ago

Sat, Nov 15 - Wed, Nov 19

PHL

Philadelphia

ONT

Ontario

$284 Roundtrip, found 3 days ago

$284

Roundtrip

found 3 days ago

Select Frontier Airlines flight, departing Sat, Nov 15 from Philadelphia to Ontario, returning Wed, Nov 19, priced at $284 found 3 days ago

Mon, Mar 2 - Fri, Mar 6

PHL

Philadelphia

ONT

Ontario

$299 Roundtrip, found 4 days ago

$299

Roundtrip

found 4 days ago

Select Frontier Airlines flight, departing Mon, Mar 2 from Philadelphia to Ontario, returning Fri, Mar 6, priced at $299 found 4 days ago

Sat, Nov 15 - Sun, Nov 16

PHL

Philadelphia

ONT

Ontario

$307 Roundtrip, found 3 days ago

$307

Roundtrip

found 3 days ago

Select Frontier Airlines flight, departing Sat, Nov 15 from Philadelphia to Ontario, returning Sun, Nov 16, priced at $307 found 3 days ago

Thu, Nov 13 - Wed, Nov 19

PHL

Philadelphia

ONT

Ontario

$314 Roundtrip, found 3 days ago

$314

Roundtrip

found 3 days ago

Select Frontier Airlines flight, departing Thu, Nov 13 from Philadelphia to Ontario, returning Wed, Nov 19, priced at $314 found 3 days ago

Sat, Dec 20 - Mon, Jan 5

PHL

Philadelphia

ONT

Ontario

$316 Roundtrip, found 22 hours ago

$316

Roundtrip

found 22 hours ago

Select Frontier Airlines flight, departing Sat, Dec 20 from Philadelphia to Ontario, returning Mon, Jan 5, priced at $316 found 22 hours ago

Fri, Feb 27 - Mon, Mar 9

PHL

Philadelphia

ONT

Ontario

$324 Roundtrip, found 4 days ago

$324

Roundtrip

found 4 days ago

Select Frontier Airlines flight, departing Fri, Feb 27 from Philadelphia to Ontario, returning Mon, Mar 9, priced at $324 found 4 days ago

Thu, Nov 13 - Fri, Nov 14

PHL

Philadelphia

ONT

Ontario

$337 Roundtrip, found 3 days ago

$337

Roundtrip

found 3 days ago

Select Frontier Airlines flight, departing Thu, Nov 13 from Philadelphia to Ontario, returning Fri, Nov 14, priced at $337 found 3 days ago