$81 Cheap Frontier Airlines flights Portland (PDX) to Ontario (ONT)

$81 Cheap Frontier Airlines flights Portland (PDX) to Ontario (ONT)

Prices were available within the past 7 days and start at $81 for one-way flights and $150 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Sat, Apr 18 - Tue, Apr 21

PDX

Portland

ONT

Ontario

$150 Roundtrip, found 5 days ago

$150

Roundtrip

found 5 days ago

Select Frontier Airlines flight, departing Sat, Apr 18 from Portland to Ontario, returning Tue, Apr 21, priced at $150 found 5 days ago

Thu, Apr 16 - Tue, Apr 21

PDX

Portland

ONT

Ontario

$170 Roundtrip, found 5 days ago

$170

Roundtrip

found 5 days ago

Select Frontier Airlines flight, departing Thu, Apr 16 from Portland to Ontario, returning Tue, Apr 21, priced at $170 found 5 days ago

Thu, Apr 16 - Sun, Apr 19

PDX

Portland

ONT

Ontario

$190 Roundtrip, found 1 day ago

$190

Roundtrip

found 1 day ago

Select Frontier Airlines flight, departing Thu, Apr 16 from Portland to Ontario, returning Sun, Apr 19, priced at $190 found 1 day ago

Fri, Apr 17 - Tue, Apr 21

PDX

Portland

ONT

Ontario

$191 Roundtrip, found 5 days ago

$191

Roundtrip

found 5 days ago

Select Frontier Airlines flight, departing Fri, Apr 17 from Portland to Ontario, returning Tue, Apr 21, priced at $191 found 5 days ago

Sat, May 2 - Fri, May 8

PDX

Portland

ONT

Ontario

$195 Roundtrip, found 3 hours ago

$195

Roundtrip

found 3 hours ago

Select Frontier Airlines flight, departing Sat, May 2 from Portland to Ontario, returning Fri, May 8, priced at $195 found 3 hours ago

Thu, Apr 16 - Sun, Apr 19

PDX

Portland

ONT

Ontario

$211 Roundtrip, found 1 day ago

$211

Roundtrip

found 1 day ago

Select Frontier Airlines flight, departing Thu, Apr 16 from Portland to Ontario, returning Sun, Apr 19, priced at $211 found 1 day ago