$83 Cheap Frontier Airlines flights Portland (PDX) to Ontario (ONT)

$83 Cheap Frontier Airlines flights Portland (PDX) to Ontario (ONT)

Prices were available within the past 7 days and start at $83 for one-way flights and $158 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Tue, Oct 21 - Tue, Oct 28

PDX

Portland

ONT

Ontario

$158 Roundtrip, found 2 days ago

$158

Roundtrip

found 2 days ago

Select Frontier Airlines flight, departing Tue, Oct 21 from Portland to Ontario, returning Tue, Oct 28, priced at $158 found 2 days ago

Mon, Sep 22 - Thu, Sep 25

PDX

Portland

ONT

Ontario

$165 Roundtrip, found 5 days ago

$165

Roundtrip

found 5 days ago

Select Frontier Airlines flight, departing Mon, Sep 22 from Portland to Ontario, returning Thu, Sep 25, priced at $165 found 5 days ago

Sun, Dec 7 - Thu, Dec 18

PDX

Portland

ONT

Ontario

$186 Roundtrip, found 1 day ago

$186

Roundtrip

found 1 day ago

Select Frontier Airlines flight, departing Sun, Dec 7 from Portland to Ontario, returning Thu, Dec 18, priced at $186 found 1 day ago

Sun, Sep 21 - Mon, Sep 22

PDX

Portland

ONT

Ontario

$211 Roundtrip, found 5 days ago

$211

Roundtrip

found 5 days ago

Select Frontier Airlines flight, departing Sun, Sep 21 from Portland to Ontario, returning Mon, Sep 22, priced at $211 found 5 days ago

Sun, Sep 21 - Thu, Sep 25

PDX

Portland

ONT

Ontario

$216 Roundtrip, found 5 days ago

$216

Roundtrip

found 5 days ago

Select Frontier Airlines flight, departing Sun, Sep 21 from Portland to Ontario, returning Thu, Sep 25, priced at $216 found 5 days ago

Sun, Sep 21 - Mon, Sep 22

PDX

Portland

ONT

Ontario

$245 Roundtrip, found 4 days ago

$245

Roundtrip

found 4 days ago

Select Frontier Airlines flight, departing Sun, Sep 21 from Portland to Ontario, returning Mon, Sep 22, priced at $245 found 4 days ago

Sun, Nov 30 - Thu, Dec 4

PDX

Portland

ONT

Ontario

$336 Roundtrip, found 20 hours ago

$336

Roundtrip

found 20 hours ago

Select Frontier Airlines flight, departing Sun, Nov 30 from Portland to Ontario, returning Thu, Dec 4, priced at $336 found 20 hours ago