Cheap Frontier Airlines flights Portland (PDX) to Ontario (ONT)

Cheap Frontier Airlines flights Portland (PDX) to Ontario (ONT)

Prices were available within the past 7 days and start at for one-way flights and $156 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Thu, Jan 22 - Wed, Jan 28

PDX

Portland

ONT

Ontario

$156 Roundtrip, found 1 day ago

$156

Roundtrip

found 1 day ago

Select Frontier Airlines flight, departing Thu, Jan 22 from Portland to Ontario, returning Wed, Jan 28, priced at $156 found 1 day ago

Thu, Jan 22 - Thu, Jan 29

PDX

Portland

ONT

Ontario

$173 Roundtrip, found 1 day ago

$173

Roundtrip

found 1 day ago

Select Frontier Airlines flight, departing Thu, Jan 22 from Portland to Ontario, returning Thu, Jan 29, priced at $173 found 1 day ago

Sun, Jan 25 - Wed, Jan 28

PDX

Portland

ONT

Ontario

$191 Roundtrip, found 1 day ago

$191

Roundtrip

found 1 day ago

Select Frontier Airlines flight, departing Sun, Jan 25 from Portland to Ontario, returning Wed, Jan 28, priced at $191 found 1 day ago