$165 Cheap Frontier Airlines flights St. Louis (STL) to Philadelphia (PHL)

$165 Cheap Frontier Airlines flights St. Louis (STL) to Philadelphia (PHL)

Prices were available within the past 7 days and start at $165 for one-way flights and $160 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Tue, Mar 31 - Wed, Apr 8

STL

St. Louis

PHL

Philadelphia

$160 Roundtrip, found 1 day ago

$160

Roundtrip

found 1 day ago

Select Frontier Airlines flight, departing Tue, Mar 31 from St. Louis to Philadelphia, returning Wed, Apr 8, priced at $160 found 1 day ago

Wed, Apr 1 - Wed, Apr 8

STL

St. Louis

PHL

Philadelphia

$180 Roundtrip, found 1 day ago

$180

Roundtrip

found 1 day ago

Select Frontier Airlines flight, departing Wed, Apr 1 from St. Louis to Philadelphia, returning Wed, Apr 8, priced at $180 found 1 day ago

Thu, Apr 2 - Wed, Apr 8

STL

St. Louis

PHL

Philadelphia

$195 Roundtrip, found 1 day ago

$195

Roundtrip

found 1 day ago

Select Frontier Airlines flight, departing Thu, Apr 2 from St. Louis to Philadelphia, returning Wed, Apr 8, priced at $195 found 1 day ago

Wed, Apr 1 - Fri, Apr 10

STL

St. Louis

PHL

Philadelphia

$200 Roundtrip, found 1 day ago

$200

Roundtrip

found 1 day ago

Select Frontier Airlines flight, departing Wed, Apr 1 from St. Louis to Philadelphia, returning Fri, Apr 10, priced at $200 found 1 day ago

Thu, Apr 2 - Fri, Apr 10

STL

St. Louis

PHL

Philadelphia

$215 Roundtrip, found 1 day ago

$215

Roundtrip

found 1 day ago

Select Frontier Airlines flight, departing Thu, Apr 2 from St. Louis to Philadelphia, returning Fri, Apr 10, priced at $215 found 1 day ago

Sun, Apr 5 - Wed, Apr 8

STL

St. Louis

PHL

Philadelphia

$245 Roundtrip, found 1 day ago

$245

Roundtrip

found 1 day ago

Select Frontier Airlines flight, departing Sun, Apr 5 from St. Louis to Philadelphia, returning Wed, Apr 8, priced at $245 found 1 day ago

Sun, Apr 5 - Fri, Apr 10

STL

St. Louis

PHL

Philadelphia

$265 Roundtrip, found 1 day ago

$265

Roundtrip

found 1 day ago

Select Frontier Airlines flight, departing Sun, Apr 5 from St. Louis to Philadelphia, returning Fri, Apr 10, priced at $265 found 1 day ago

Thu, Apr 2 - Fri, Apr 3

STL

St. Louis

PHL

Philadelphia

$280 Roundtrip, found 1 day ago

$280

Roundtrip

found 1 day ago

Select Frontier Airlines flight, departing Thu, Apr 2 from St. Louis to Philadelphia, returning Fri, Apr 3, priced at $280 found 1 day ago

Fri, Apr 3 - Sat, Apr 4

STL

St. Louis

PHL

Philadelphia

$330 Roundtrip, found 1 day ago

$330

Roundtrip

found 1 day ago

Select Frontier Airlines flight, departing Fri, Apr 3 from St. Louis to Philadelphia, returning Sat, Apr 4, priced at $330 found 1 day ago