$265 Cheap Frontier Airlines flights Philadelphia (PHL) to St. Louis (STL)

$265 Cheap Frontier Airlines flights Philadelphia (PHL) to St. Louis (STL)

Prices were available within the past 7 days and start at $265 for one-way flights and $292 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Thu, Jul 3 - Sat, Jul 5

PHL

Philadelphia

STL

St. Louis

$292 Roundtrip, found 12 hours ago

$292

Roundtrip

found 12 hours ago

Select Frontier Airlines flight, departing Thu, Jul 3 from Philadelphia to St. Louis, returning Sat, Jul 5, priced at $292 found 12 hours ago

Mon, Jun 30 - Sat, Jul 5

PHL

Philadelphia

STL

St. Louis

$342 Roundtrip, found 12 hours ago

$342

Roundtrip

found 12 hours ago

Select Frontier Airlines flight, departing Mon, Jun 30 from Philadelphia to St. Louis, returning Sat, Jul 5, priced at $342 found 12 hours ago

Sun, Jun 22 - Mon, Jun 30

PHL

Philadelphia

STL

St. Louis

$362 Roundtrip, found 6 hours ago

$362

Roundtrip

found 6 hours ago

Select Frontier Airlines flight, departing Sun, Jun 22 from Philadelphia to St. Louis, returning Mon, Jun 30, priced at $362 found 6 hours ago

Thu, Jun 19 - Thu, Jun 19

PHL

Philadelphia

STL

St. Louis

$412 Roundtrip, found 6 hours ago

$412

Roundtrip

found 6 hours ago

Select Frontier Airlines flight, departing Thu, Jun 19 from Philadelphia to St. Louis, returning Thu, Jun 19, priced at $412 found 6 hours ago

Fri, Jun 20 - Sun, Jun 22

PHL

Philadelphia

STL

St. Louis

$471 Roundtrip, found 6 hours ago

$471

Roundtrip

found 6 hours ago

Select Frontier Airlines flight, departing Fri, Jun 20 from Philadelphia to St. Louis, returning Sun, Jun 22, priced at $471 found 6 hours ago

Fri, Jun 20 - Sun, Jun 22

PHL

Philadelphia

STL

St. Louis

$474 Roundtrip, found 6 hours ago

$474

Roundtrip

found 6 hours ago

Select Frontier Airlines flight, departing Fri, Jun 20 from Philadelphia to St. Louis, returning Sun, Jun 22, priced at $474 found 6 hours ago