$119 Cheap Frontier Airlines flights Philadelphia (PHL) to St. Louis (STL)

$119 Cheap Frontier Airlines flights Philadelphia (PHL) to St. Louis (STL)

Prices were available within the past 7 days and start at $119 for one-way flights and $200 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Tue, Jul 14 - Tue, Jul 28

PHL

Philadelphia

STL

St. Louis

$200 Roundtrip, found 2 days ago

$200

Roundtrip

found 2 days ago

Select Frontier Airlines flight, departing Tue, Jul 14 from Philadelphia to St. Louis, returning Tue, Jul 28, priced at $200 found 2 days ago

Tue, Jun 9 - Thu, Jun 18

PHL

Philadelphia

STL

St. Louis

$210 Roundtrip, found 6 days ago

$210

Roundtrip

found 6 days ago

Select Frontier Airlines flight, departing Tue, Jun 9 from Philadelphia to St. Louis, returning Thu, Jun 18, priced at $210 found 6 days ago

Tue, Jul 14 - Sat, Jul 25

PHL

Philadelphia

STL

St. Louis

$214 Roundtrip, found 2 days ago

$214

Roundtrip

found 2 days ago

Select Frontier Airlines flight, departing Tue, Jul 14 from Philadelphia to St. Louis, returning Sat, Jul 25, priced at $214 found 2 days ago

Tue, Jul 14 - Mon, Jul 27

PHL

Philadelphia

STL

St. Louis

$219 Roundtrip, found 2 days ago

$219

Roundtrip

found 2 days ago

Select Frontier Airlines flight, departing Tue, Jul 14 from Philadelphia to St. Louis, returning Mon, Jul 27, priced at $219 found 2 days ago

Sun, Jul 12 - Tue, Jul 28

PHL

Philadelphia

STL

St. Louis

$220 Roundtrip, found 2 days ago

$220

Roundtrip

found 2 days ago

Select Frontier Airlines flight, departing Sun, Jul 12 from Philadelphia to St. Louis, returning Tue, Jul 28, priced at $220 found 2 days ago

Sat, Jul 11 - Sat, Jul 25

PHL

Philadelphia

STL

St. Louis

$228 Roundtrip, found 2 days ago

$228

Roundtrip

found 2 days ago

Select Frontier Airlines flight, departing Sat, Jul 11 from Philadelphia to St. Louis, returning Sat, Jul 25, priced at $228 found 2 days ago