$106 Cheap Frontier Airlines flights Philadelphia (PHL) to St. Louis (STL)

$106 Cheap Frontier Airlines flights Philadelphia (PHL) to St. Louis (STL)

Prices were available within the past 7 days and start at $106 for one-way flights and $177 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Wed, Nov 19 - Mon, Nov 24

PHL

Philadelphia

STL

St. Louis

$177 Roundtrip, found 1 day ago

$177

Roundtrip

found 1 day ago

Select Frontier Airlines flight, departing Wed, Nov 19 from Philadelphia to St. Louis, returning Mon, Nov 24, priced at $177 found 1 day ago

Wed, Nov 19 - Thu, Nov 20

PHL

Philadelphia

STL

St. Louis

$200 Roundtrip, found 1 day ago

$200

Roundtrip

found 1 day ago

Select Frontier Airlines flight, departing Wed, Nov 19 from Philadelphia to St. Louis, returning Thu, Nov 20, priced at $200 found 1 day ago

Sun, Nov 23 - Mon, Nov 24

PHL

Philadelphia

STL

St. Louis

$223 Roundtrip, found 1 day ago

$223

Roundtrip

found 1 day ago

Select Frontier Airlines flight, departing Sun, Nov 23 from Philadelphia to St. Louis, returning Mon, Nov 24, priced at $223 found 1 day ago

Wed, Nov 19 - Sun, Nov 23

PHL

Philadelphia

STL

St. Louis

$246 Roundtrip, found 1 day ago

$246

Roundtrip

found 1 day ago

Select Frontier Airlines flight, departing Wed, Nov 19 from Philadelphia to St. Louis, returning Sun, Nov 23, priced at $246 found 1 day ago

Thu, Nov 20 - Sun, Nov 23

PHL

Philadelphia

STL

St. Louis

$276 Roundtrip, found 1 day ago

$276

Roundtrip

found 1 day ago

Select Frontier Airlines flight, departing Thu, Nov 20 from Philadelphia to St. Louis, returning Sun, Nov 23, priced at $276 found 1 day ago

Mon, Nov 17 - Mon, Nov 24

PHL

Philadelphia

STL

St. Louis

$293 Roundtrip, found 1 day ago

$293

Roundtrip

found 1 day ago

Select Frontier Airlines flight, departing Mon, Nov 17 from Philadelphia to St. Louis, returning Mon, Nov 24, priced at $293 found 1 day ago