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

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

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, Jul 1 - Tue, Jul 7

ONT

Ontario

PDX

Portland

$200 Roundtrip, found 1 day ago

$200

Roundtrip

found 1 day ago

Select Frontier Airlines flight, departing Wed, Jul 1 from Ontario to Portland, returning Tue, Jul 7, priced at $200 found 1 day ago

Wed, Jul 1 - Sat, Jul 4

ONT

Ontario

PDX

Portland

$214 Roundtrip, found 1 day ago

$214

Roundtrip

found 1 day ago

Select Frontier Airlines flight, departing Wed, Jul 1 from Ontario to Portland, returning Sat, Jul 4, priced at $214 found 1 day ago

Sat, Jun 20 - Thu, Jul 2

ONT

Ontario

PDX

Portland

$220 Roundtrip, found 3 days ago

$220

Roundtrip

found 3 days ago

Select Frontier Airlines flight, departing Sat, Jun 20 from Ontario to Portland, returning Thu, Jul 2, priced at $220 found 3 days ago

Thu, Jul 16 - Sat, Jul 18

ONT

Ontario

PDX

Portland

$233 Roundtrip, found 17 hours ago

$233

Roundtrip

found 17 hours ago

Select Frontier Airlines flight, departing Thu, Jul 16 from Ontario to Portland, returning Sat, Jul 18, priced at $233 found 17 hours ago

Wed, Jul 1 - Wed, Jul 8

ONT

Ontario

PDX

Portland

$240 Roundtrip, found 1 day ago

$240

Roundtrip

found 1 day ago

Select Frontier Airlines flight, departing Wed, Jul 1 from Ontario to Portland, returning Wed, Jul 8, priced at $240 found 1 day ago

Mon, Jun 1 - Wed, Jun 3

ONT

Ontario

PDX

Portland

$244 Roundtrip, found 4 days ago

$244

Roundtrip

found 4 days ago

Select Frontier Airlines flight, departing Mon, Jun 1 from Ontario to Portland, returning Wed, Jun 3, priced at $244 found 4 days ago