$44 Cheap Frontier Airlines flights Portland (PDX) to Ontario (ONT)

$44 Cheap Frontier Airlines flights Portland (PDX) to Ontario (ONT)

Prices were available within the past 7 days and start at $44 for one-way flights and $88 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Sat, Aug 9 - Tue, Aug 12

PDX

Portland

ONT

Ontario

$88 Roundtrip, found 1 day ago

$88

Roundtrip

found 1 day ago

Select Frontier Airlines flight, departing Sat, Aug 9 from Portland to Ontario, returning Tue, Aug 12, priced at $88 found 1 day ago

Sat, Aug 9 - Fri, Aug 15

PDX

Portland

ONT

Ontario

$97 Roundtrip, found 1 day ago

$97

Roundtrip

found 1 day ago

Select Frontier Airlines flight, departing Sat, Aug 9 from Portland to Ontario, returning Fri, Aug 15, priced at $97 found 1 day ago

Fri, Aug 8 - Fri, Aug 15

PDX

Portland

ONT

Ontario

$106 Roundtrip, found 1 day ago

$106

Roundtrip

found 1 day ago

Select Frontier Airlines flight, departing Fri, Aug 8 from Portland to Ontario, returning Fri, Aug 15, priced at $106 found 1 day ago

Tue, Jul 15 - Sat, Jul 26

PDX

Portland

ONT

Ontario

$110 Roundtrip, found 6 days ago

$110

Roundtrip

found 6 days ago

Select Frontier Airlines flight, departing Tue, Jul 15 from Portland to Ontario, returning Sat, Jul 26, priced at $110 found 6 days ago

Tue, Jun 24 - Sat, Jun 28

PDX

Portland

ONT

Ontario

$129 Roundtrip, found 5 days ago

$129

Roundtrip

found 5 days ago

Select Frontier Airlines flight, departing Tue, Jun 24 from Portland to Ontario, returning Sat, Jun 28, priced at $129 found 5 days ago

Tue, Aug 12 - Thu, Aug 14

PDX

Portland

ONT

Ontario

$139 Roundtrip, found 1 day ago

$139

Roundtrip

found 1 day ago

Select Frontier Airlines flight, departing Tue, Aug 12 from Portland to Ontario, returning Thu, Aug 14, priced at $139 found 1 day ago

Sat, Jul 19 - Tue, Jul 29

PDX

Portland

ONT

Ontario

$140 Roundtrip, found 6 days ago

$140

Roundtrip

found 6 days ago

Select Frontier Airlines flight, departing Sat, Jul 19 from Portland to Ontario, returning Tue, Jul 29, priced at $140 found 6 days ago