$131 Cheap Frontier Airlines flights Portland (PDX) to St. Louis (STL)

$131 Cheap Frontier Airlines flights Portland (PDX) to St. Louis (STL)

Prices were available within the past 7 days and start at $131 for one-way flights and $235 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Fri, May 8 - Thu, May 14

PDX

Portland

STL

St. Louis

$235 Roundtrip, found 9 hours ago

$235

Roundtrip

found 9 hours ago

Select Frontier Airlines flight, departing Fri, May 8 from Portland to St. Louis, returning Thu, May 14, priced at $235 found 9 hours ago

Mon, May 11 - Thu, May 14

PDX

Portland

STL

St. Louis

$260 Roundtrip, found 9 hours ago

$260

Roundtrip

found 9 hours ago

Select Frontier Airlines flight, departing Mon, May 11 from Portland to St. Louis, returning Thu, May 14, priced at $260 found 9 hours ago

Sun, May 10 - Thu, May 14

PDX

Portland

STL

St. Louis

$356 Roundtrip, found 9 hours ago

$356

Roundtrip

found 9 hours ago

Select Frontier Airlines flight, departing Sun, May 10 from Portland to St. Louis, returning Thu, May 14, priced at $356 found 9 hours ago