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 $140 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Thu, Dec 11 - Sat, Dec 13

PDX

Portland

STL

St. Louis

$140 Roundtrip, found 1 day ago

$140

Roundtrip

found 1 day ago

Select Frontier Airlines flight, departing Thu, Dec 11 from Portland to St. Louis, returning Sat, Dec 13, priced at $140 found 1 day ago

Thu, Dec 11 - Sun, Dec 14

PDX

Portland

STL

St. Louis

$144 Roundtrip, found 1 day ago

$144

Roundtrip

found 1 day ago

Select Frontier Airlines flight, departing Thu, Dec 11 from Portland to St. Louis, returning Sun, Dec 14, priced at $144 found 1 day ago

Sun, Dec 7 - Sun, Dec 14

PDX

Portland

STL

St. Louis

$148 Roundtrip, found 1 day ago

$148

Roundtrip

found 1 day ago

Select Frontier Airlines flight, departing Sun, Dec 7 from Portland to St. Louis, returning Sun, Dec 14, priced at $148 found 1 day ago

Fri, Dec 12 - Sun, Dec 14

PDX

Portland

STL

St. Louis

$152 Roundtrip, found 1 day ago

$152

Roundtrip

found 1 day ago

Select Frontier Airlines flight, departing Fri, Dec 12 from Portland to St. Louis, returning Sun, Dec 14, priced at $152 found 1 day ago

Thu, Jan 15 - Sun, Jan 18

PDX

Portland

STL

St. Louis

$286 Roundtrip, found 1 day ago

$286

Roundtrip

found 1 day ago

Select Frontier Airlines flight, departing Thu, Jan 15 from Portland to St. Louis, returning Sun, Jan 18, priced at $286 found 1 day ago