$64 Cheap Frontier Airlines flights Portland (PDX) to Ontario (ONT)

$64 Cheap Frontier Airlines flights Portland (PDX) to Ontario (ONT)

Prices were available within the past 7 days and start at $64 for one-way flights and $119 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Sat, Jul 19 - Sat, Jul 26

PDX

Portland

ONT

Ontario

$119 Roundtrip, found 6 days ago

$119

Roundtrip

found 6 days ago

Select Frontier Airlines flight, departing Sat, Jul 19 from Portland to Ontario, returning Sat, Jul 26, priced at $119 found 6 days ago

Thu, Jul 17 - Sat, Jul 26

PDX

Portland

ONT

Ontario

$128 Roundtrip, found 19 hours ago

$128

Roundtrip

found 19 hours ago

Select Frontier Airlines flight, departing Thu, Jul 17 from Portland to Ontario, returning Sat, Jul 26, priced at $128 found 19 hours ago

Thu, Jul 17 - Sun, Jul 27

PDX

Portland

ONT

Ontario

$133 Roundtrip, found 19 hours ago

$133

Roundtrip

found 19 hours ago

Select Frontier Airlines flight, departing Thu, Jul 17 from Portland to Ontario, returning Sun, Jul 27, priced at $133 found 19 hours ago

Thu, Jul 17 - Tue, Jul 22

PDX

Portland

ONT

Ontario

$138 Roundtrip, found 19 hours ago

$138

Roundtrip

found 19 hours ago

Select Frontier Airlines flight, departing Thu, Jul 17 from Portland to Ontario, returning Tue, Jul 22, priced at $138 found 19 hours ago

Sat, Jul 19 - Sat, Jul 26

PDX

Portland

ONT

Ontario

$143 Roundtrip, found 19 hours ago

$143

Roundtrip

found 19 hours ago

Select Frontier Airlines flight, departing Sat, Jul 19 from Portland to Ontario, returning Sat, Jul 26, priced at $143 found 19 hours ago

Thu, Jul 17 - Mon, Jul 21

PDX

Portland

ONT

Ontario

$148 Roundtrip, found 19 hours ago

$148

Roundtrip

found 19 hours ago

Select Frontier Airlines flight, departing Thu, Jul 17 from Portland to Ontario, returning Mon, Jul 21, priced at $148 found 19 hours ago

Mon, Jul 14 - Sun, Jul 27

PDX

Portland

ONT

Ontario

$153 Roundtrip, found 19 hours ago

$153

Roundtrip

found 19 hours ago

Select Frontier Airlines flight, departing Mon, Jul 14 from Portland to Ontario, returning Sun, Jul 27, priced at $153 found 19 hours ago