$171 Cheap Frontier Airlines flights Portland (PDX) to St. Louis (STL)

$171 Cheap Frontier Airlines flights Portland (PDX) to St. Louis (STL)

Prices were available within the past 7 days and start at $171 for one-way flights and $380 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Thu, Mar 26 - Sun, Mar 29

PDX

Portland

STL

St. Louis

$380 Roundtrip, found 1 day ago

$380

Roundtrip

found 1 day ago

Select Frontier Airlines flight, departing Thu, Mar 26 from Portland to St. Louis, returning Sun, Mar 29, priced at $380 found 1 day ago

Thu, Mar 26 - Sat, Mar 28

PDX

Portland

STL

St. Louis

$402 Roundtrip, found 1 day ago

$402

Roundtrip

found 1 day ago

Select Frontier Airlines flight, departing Thu, Mar 26 from Portland to St. Louis, returning Sat, Mar 28, priced at $402 found 1 day ago

Fri, Mar 27 - Sat, Mar 28

PDX

Portland

STL

St. Louis

$430 Roundtrip, found 1 day ago

$430

Roundtrip

found 1 day ago

Select Frontier Airlines flight, departing Fri, Mar 27 from Portland to St. Louis, returning Sat, Mar 28, priced at $430 found 1 day ago