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

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

Prices were available within the past 7 days and start at for one-way flights and $190 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

$190 Roundtrip, found 14 hours ago

$190

Roundtrip

found 14 hours ago

Select Frontier Airlines flight, departing Wed, Jun 3 from St. Louis to Philadelphia, returning Tue, Jun 9, priced at $190 found 14 hours ago

Wed, Jun 3 - Wed, Jun 10

STL

St. Louis

PHL

Philadelphia

$195 Roundtrip, found 14 hours ago

$195

Roundtrip

found 14 hours ago

Select Frontier Airlines flight, departing Wed, Jun 3 from St. Louis to Philadelphia, returning Wed, Jun 10, priced at $195 found 14 hours ago

Wed, Jun 3 - Thu, Jun 11

STL

St. Louis

PHL

Philadelphia

$215 Roundtrip, found 14 hours ago

$215

Roundtrip

found 14 hours ago

Select Frontier Airlines flight, departing Wed, Jun 3 from St. Louis to Philadelphia, returning Thu, Jun 11, priced at $215 found 14 hours ago