$100 Cheap Frontier Airlines flights Portland (PDX) to Ontario Intl. Airport (ONT)

$100 Cheap Frontier Airlines flights Portland (PDX) to Ontario Intl. Airport (ONT)

Prices were available within the past 7 days and start at $100 for one-way flights and $200 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Wed, Jun 10 - Wed, Jul 1

PDX

Portland

ONT

Ontario

$200 Roundtrip, found 4 days ago

$200

Roundtrip

found 4 days ago

Select Frontier Airlines flight, departing Wed, Jun 10 from Portland to Ontario, returning Wed, Jul 1, priced at $200 found 4 days ago

Mon, Jun 15 - Wed, Jul 1

PDX

Portland

ONT

Ontario

$210 Roundtrip, found 4 days ago

$210

Roundtrip

found 4 days ago

Select Frontier Airlines flight, departing Mon, Jun 15 from Portland to Ontario, returning Wed, Jul 1, priced at $210 found 4 days ago

Tue, Jun 2 - Wed, Jun 10

PDX

Portland

ONT

Ontario

$214 Roundtrip, found 4 days ago

$214

Roundtrip

found 4 days ago

Select Frontier Airlines flight, departing Tue, Jun 2 from Portland to Ontario, returning Wed, Jun 10, priced at $214 found 4 days ago

Mon, Jun 15 - Tue, Jun 23

PDX

Portland

ONT

Ontario

$219 Roundtrip, found 17 hours ago

$219

Roundtrip

found 17 hours ago

Select Frontier Airlines flight, departing Mon, Jun 15 from Portland to Ontario, returning Tue, Jun 23, priced at $219 found 17 hours ago

Mon, Jun 15 - Fri, Jul 3

PDX

Portland

ONT

Ontario

$220 Roundtrip, found 4 days ago

$220

Roundtrip

found 4 days ago

Select Frontier Airlines flight, departing Mon, Jun 15 from Portland to Ontario, returning Fri, Jul 3, priced at $220 found 4 days ago

Tue, Jun 2 - Thu, Jun 18

PDX

Portland

ONT

Ontario

$225 Roundtrip, found 4 days ago

$225

Roundtrip

found 4 days ago

Select Frontier Airlines flight, departing Tue, Jun 2 from Portland to Ontario, returning Thu, Jun 18, priced at $225 found 4 days ago