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

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

Prices were available within the past 7 days and start at for one-way flights and $148 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Thu, Dec 25 - Sun, Jan 4

ONT

Ontario

PDX

Portland

$148 Roundtrip, found 2 days ago

$148

Roundtrip

found 2 days ago

Select Frontier Airlines flight, departing Thu, Dec 25 from Ontario to Portland, returning Sun, Jan 4, priced at $148 found 2 days ago

Thu, Jan 8 - Thu, Jan 22

ONT

Ontario

PDX

Portland

$172 Roundtrip, found 1 day ago

$172

Roundtrip

found 1 day ago

Select Frontier Airlines flight, departing Thu, Jan 8 from Ontario to Portland, returning Thu, Jan 22, priced at $172 found 1 day ago

Thu, Dec 25 - Thu, Jan 8

ONT

Ontario

PDX

Portland

$173 Roundtrip, found 2 days ago

$173

Roundtrip

found 2 days ago

Select Frontier Airlines flight, departing Thu, Dec 25 from Ontario to Portland, returning Thu, Jan 8, priced at $173 found 2 days ago

Thu, Dec 25 - Sun, Jan 4

ONT

Ontario

PDX

Portland

$174 Roundtrip, found 2 days ago

$174

Roundtrip

found 2 days ago

Select Frontier Airlines flight, departing Thu, Dec 25 from Ontario to Portland, returning Sun, Jan 4, priced at $174 found 2 days ago

Mon, Dec 29 - Sun, Jan 4

ONT

Ontario

PDX

Portland

$204 Roundtrip, found 2 days ago

$204

Roundtrip

found 2 days ago

Select Frontier Airlines flight, departing Mon, Dec 29 from Ontario to Portland, returning Sun, Jan 4, priced at $204 found 2 days ago

Mon, Dec 29 - Sun, Jan 4

ONT

Ontario

PDX

Portland

$224 Roundtrip, found 1 day ago

$224

Roundtrip

found 1 day ago

Select Frontier Airlines flight, departing Mon, Dec 29 from Ontario to Portland, returning Sun, Jan 4, priced at $224 found 1 day ago

Sat, Dec 6 - Thu, Dec 18

ONT

Ontario

PDX

Portland

$228 Roundtrip, found 1 day ago

$228

Roundtrip

found 1 day ago

Select Frontier Airlines flight, departing Sat, Dec 6 from Ontario to Portland, returning Thu, Dec 18, priced at $228 found 1 day ago

Tue, Dec 30 - Thu, Jan 15

ONT

Ontario

PDX

Portland

$242 Roundtrip, found 1 day ago

$242

Roundtrip

found 1 day ago

Select Frontier Airlines flight, departing Tue, Dec 30 from Ontario to Portland, returning Thu, Jan 15, priced at $242 found 1 day ago