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 $153 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Thu, Nov 6 - Thu, Nov 13

STL

St. Louis

PHL

Philadelphia

$153 Roundtrip, found 20 hours ago

$153

Roundtrip

found 20 hours ago

Select Frontier Airlines flight, departing Thu, Nov 6 from St. Louis to Philadelphia, returning Thu, Nov 13, priced at $153 found 20 hours ago

Thu, Nov 6 - Wed, Nov 12

STL

St. Louis

PHL

Philadelphia

$173 Roundtrip, found 20 hours ago

$173

Roundtrip

found 20 hours ago

Select Frontier Airlines flight, departing Thu, Nov 6 from St. Louis to Philadelphia, returning Wed, Nov 12, priced at $173 found 20 hours ago

Wed, Nov 5 - Thu, Nov 6

STL

St. Louis

PHL

Philadelphia

$186 Roundtrip, found 20 hours ago

$186

Roundtrip

found 20 hours ago

Select Frontier Airlines flight, departing Wed, Nov 5 from St. Louis to Philadelphia, returning Thu, Nov 6, priced at $186 found 20 hours ago

Fri, Oct 31 - Wed, Nov 12

STL

St. Louis

PHL

Philadelphia

$199 Roundtrip, found 20 hours ago

$199

Roundtrip

found 20 hours ago

Select Frontier Airlines flight, departing Fri, Oct 31 from St. Louis to Philadelphia, returning Wed, Nov 12, priced at $199 found 20 hours ago

Fri, Oct 31 - Thu, Nov 6

STL

St. Louis

PHL

Philadelphia

$212 Roundtrip, found 20 hours ago

$212

Roundtrip

found 20 hours ago

Select Frontier Airlines flight, departing Fri, Oct 31 from St. Louis to Philadelphia, returning Thu, Nov 6, priced at $212 found 20 hours ago

Fri, Oct 31 - Sat, Nov 1

STL

St. Louis

PHL

Philadelphia

$238 Roundtrip, found 20 hours ago

$238

Roundtrip

found 20 hours ago

Select Frontier Airlines flight, departing Fri, Oct 31 from St. Louis to Philadelphia, returning Sat, Nov 1, priced at $238 found 20 hours ago

Fri, Oct 31 - Wed, Nov 5

STL

St. Louis

PHL

Philadelphia

$579 Roundtrip, found 20 hours ago

$579

Roundtrip

found 20 hours ago

Select Frontier Airlines flight, departing Fri, Oct 31 from St. Louis to Philadelphia, returning Wed, Nov 5, priced at $579 found 20 hours ago