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

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

Prices were available within the past 7 days and start at for one-way flights and $299 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Tue, Jun 10 - Thu, Jun 12

PDX

Portland

STL

St. Louis

$299 Roundtrip, found 1 day ago

$299

Roundtrip

found 1 day ago

Select Frontier Airlines flight, departing Tue, Jun 10 from Portland to St. Louis, returning Thu, Jun 12, priced at $299 found 1 day ago

Sun, Jun 8 - Sat, Jun 14

PDX

Portland

STL

St. Louis

$309 Roundtrip, found 1 day ago

$309

Roundtrip

found 1 day ago

Select Frontier Airlines flight, departing Sun, Jun 8 from Portland to St. Louis, returning Sat, Jun 14, priced at $309 found 1 day ago

Thu, Jun 12 - Fri, Jun 13

PDX

Portland

STL

St. Louis

$358 Roundtrip, found 1 day ago

$358

Roundtrip

found 1 day ago

Select Frontier Airlines flight, departing Thu, Jun 12 from Portland to St. Louis, returning Fri, Jun 13, priced at $358 found 1 day ago