$124 Cheap Frontier Airlines flights Philadelphia (PHL) to St. Louis (STL)

$124 Cheap Frontier Airlines flights Philadelphia (PHL) to St. Louis (STL)

Prices were available within the past 7 days and start at $124 for one-way flights and $228 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Sat, Aug 23 - Wed, Aug 27

PHL

Philadelphia

STL

St. Louis

$228 Roundtrip, found 3 days ago

$228

Roundtrip

found 3 days ago

Select Frontier Airlines flight, departing Sat, Aug 23 from Philadelphia to St. Louis, returning Wed, Aug 27, priced at $228 found 3 days ago

Fri, Aug 22 - Wed, Aug 27

PHL

Philadelphia

STL

St. Louis

$238 Roundtrip, found 3 days ago

$238

Roundtrip

found 3 days ago

Select Frontier Airlines flight, departing Fri, Aug 22 from Philadelphia to St. Louis, returning Wed, Aug 27, priced at $238 found 3 days ago

Mon, Aug 25 - Fri, Aug 29

PHL

Philadelphia

STL

St. Louis

$243 Roundtrip, found 3 days ago

$243

Roundtrip

found 3 days ago

Select Frontier Airlines flight, departing Mon, Aug 25 from Philadelphia to St. Louis, returning Fri, Aug 29, priced at $243 found 3 days ago

Sun, Aug 24 - Thu, Aug 28

PHL

Philadelphia

STL

St. Louis

$248 Roundtrip, found 3 days ago

$248

Roundtrip

found 3 days ago

Select Frontier Airlines flight, departing Sun, Aug 24 from Philadelphia to St. Louis, returning Thu, Aug 28, priced at $248 found 3 days ago

Mon, Aug 25 - Fri, Aug 29

PHL

Philadelphia

STL

St. Louis

$299 Roundtrip, found 3 days ago

$299

Roundtrip

found 3 days ago

Select Frontier Airlines flight, departing Mon, Aug 25 from Philadelphia to St. Louis, returning Fri, Aug 29, priced at $299 found 3 days ago

Mon, Aug 25 - Fri, Aug 29

PHL

Philadelphia

STL

St. Louis

$301 Roundtrip, found 3 days ago

$301

Roundtrip

found 3 days ago

Select Frontier Airlines flight, departing Mon, Aug 25 from Philadelphia to St. Louis, returning Fri, Aug 29, priced at $301 found 3 days ago