$142 Cheap Frontier Airlines flights Portland (PDX) to Ontario (ONT)

$142 Cheap Frontier Airlines flights Portland (PDX) to Ontario (ONT)

Prices were available within the past 7 days and start at $142 for one-way flights and $174 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Mon, Oct 20 - Fri, Oct 24

PDX

Portland

ONT

Ontario

$174 Roundtrip, found 11 hours ago

$174

Roundtrip

found 11 hours ago

Select Frontier Airlines flight, departing Mon, Oct 20 from Portland to Ontario, returning Fri, Oct 24, priced at $174 found 11 hours ago

Fri, Sep 19 - Thu, Sep 25

PDX

Portland

ONT

Ontario

$184 Roundtrip, found 1 day ago

$184

Roundtrip

found 1 day ago

Select Frontier Airlines flight, departing Fri, Sep 19 from Portland to Ontario, returning Thu, Sep 25, priced at $184 found 1 day ago

Tue, Aug 12 - Sun, Aug 17

PDX

Portland

ONT

Ontario

$186 Roundtrip, found 5 days ago

$186

Roundtrip

found 5 days ago

Select Frontier Airlines flight, departing Tue, Aug 12 from Portland to Ontario, returning Sun, Aug 17, priced at $186 found 5 days ago

Thu, Nov 6 - Thu, Nov 13

PDX

Portland

ONT

Ontario

$194 Roundtrip, found 1 day ago

$194

Roundtrip

found 1 day ago

Select Frontier Airlines flight, departing Thu, Nov 6 from Portland to Ontario, returning Thu, Nov 13, priced at $194 found 1 day ago

Mon, Oct 20 - Thu, Oct 23

PDX

Portland

ONT

Ontario

$204 Roundtrip, found 11 hours ago

$204

Roundtrip

found 11 hours ago

Select Frontier Airlines flight, departing Mon, Oct 20 from Portland to Ontario, returning Thu, Oct 23, priced at $204 found 11 hours ago

Sat, Nov 8 - Sun, Nov 9

PDX

Portland

ONT

Ontario

$214 Roundtrip, found 1 day ago

$214

Roundtrip

found 1 day ago

Select Frontier Airlines flight, departing Sat, Nov 8 from Portland to Ontario, returning Sun, Nov 9, priced at $214 found 1 day ago

Thu, Aug 14 - Thu, Aug 21

PDX

Portland

ONT

Ontario

$226 Roundtrip, found 5 days ago

$226

Roundtrip

found 5 days ago

Select Frontier Airlines flight, departing Thu, Aug 14 from Portland to Ontario, returning Thu, Aug 21, priced at $226 found 5 days ago