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

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

Prices were available within the past 7 days and start at $119 for one-way flights and $220 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Wed, Jun 3 - Tue, Jun 9

STL

St. Louis

PHL

Philadelphia

$220 Roundtrip, found 4 days ago

$220

Roundtrip

found 4 days ago

Select Frontier Airlines flight, departing Wed, Jun 3 from St. Louis to Philadelphia, returning Tue, Jun 9, priced at $220 found 4 days ago

Wed, Jun 3 - Sat, Jun 13

STL

St. Louis

PHL

Philadelphia

$234 Roundtrip, found 4 days ago

$234

Roundtrip

found 4 days ago

Select Frontier Airlines flight, departing Wed, Jun 3 from St. Louis to Philadelphia, returning Sat, Jun 13, priced at $234 found 4 days ago

Wed, Jun 3 - Thu, Jun 11

STL

St. Louis

PHL

Philadelphia

$239 Roundtrip, found 4 days ago

$239

Roundtrip

found 4 days ago

Select Frontier Airlines flight, departing Wed, Jun 3 from St. Louis to Philadelphia, returning Thu, Jun 11, priced at $239 found 4 days ago

Fri, Jun 5 - Tue, Jun 9

STL

St. Louis

PHL

Philadelphia

$240 Roundtrip, found 4 days ago

$240

Roundtrip

found 4 days ago

Select Frontier Airlines flight, departing Fri, Jun 5 from St. Louis to Philadelphia, returning Tue, Jun 9, priced at $240 found 4 days ago

Fri, Jun 5 - Sat, Jun 13

STL

St. Louis

PHL

Philadelphia

$254 Roundtrip, found 4 days ago

$254

Roundtrip

found 4 days ago

Select Frontier Airlines flight, departing Fri, Jun 5 from St. Louis to Philadelphia, returning Sat, Jun 13, priced at $254 found 4 days ago

Mon, Jun 15 - Tue, Jun 16

STL

St. Louis

PHL

Philadelphia

$259 Roundtrip, found 4 hours ago

$259

Roundtrip

found 4 hours ago

Select Frontier Airlines flight, departing Mon, Jun 15 from St. Louis to Philadelphia, returning Tue, Jun 16, priced at $259 found 4 hours ago