Cheap Frontier Airlines flights St. Louis (STL) to Portland (PDX)

Cheap Frontier Airlines flights St. Louis (STL) to Portland (PDX)

Prices were available within the past 7 days and start at for one-way flights and $240 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Fri, Jun 5 - Tue, Jun 9

STL

St. Louis

PDX

Portland

$240 Roundtrip, found 2 days ago

$240

Roundtrip

found 2 days ago

Select Frontier Airlines flight, departing Fri, Jun 5 from St. Louis to Portland, returning Tue, Jun 9, priced at $240 found 2 days ago

Fri, Jun 5 - Sun, Jun 14

STL

St. Louis

PDX

Portland

$260 Roundtrip, found 2 days ago

$260

Roundtrip

found 2 days ago

Select Frontier Airlines flight, departing Fri, Jun 5 from St. Louis to Portland, returning Sun, Jun 14, priced at $260 found 2 days ago

Sun, Jun 7 - Sun, Jun 14

STL

St. Louis

PDX

Portland

$280 Roundtrip, found 2 days ago

$280

Roundtrip

found 2 days ago

Select Frontier Airlines flight, departing Sun, Jun 7 from St. Louis to Portland, returning Sun, Jun 14, priced at $280 found 2 days ago

Mon, Jun 8 - Sun, Jun 14

STL

St. Louis

PDX

Portland

$300 Roundtrip, found 2 days ago

$300

Roundtrip

found 2 days ago

Select Frontier Airlines flight, departing Mon, Jun 8 from St. Louis to Portland, returning Sun, Jun 14, priced at $300 found 2 days ago

Fri, Jun 5 - Thu, Jun 11

STL

St. Louis

PDX

Portland

$325 Roundtrip, found 2 days ago

$325

Roundtrip

found 2 days ago

Select Frontier Airlines flight, departing Fri, Jun 5 from St. Louis to Portland, returning Thu, Jun 11, priced at $325 found 2 days ago

Sun, Jun 7 - Thu, Jun 11

STL

St. Louis

PDX

Portland

$345 Roundtrip, found 2 days ago

$345

Roundtrip

found 2 days ago

Select Frontier Airlines flight, departing Sun, Jun 7 from St. Louis to Portland, returning Thu, Jun 11, priced at $345 found 2 days ago

Fri, Jun 5 - Mon, Jun 15

STL

St. Louis

PDX

Portland

$385 Roundtrip, found 2 days ago

$385

Roundtrip

found 2 days ago

Select Frontier Airlines flight, departing Fri, Jun 5 from St. Louis to Portland, returning Mon, Jun 15, priced at $385 found 2 days ago

Sun, Jun 7 - Mon, Jun 15

STL

St. Louis

PDX

Portland

$405 Roundtrip, found 2 days ago

$405

Roundtrip

found 2 days ago

Select Frontier Airlines flight, departing Sun, Jun 7 from St. Louis to Portland, returning Mon, Jun 15, priced at $405 found 2 days ago