Flights from New Castle to St. Louis

Cheapest flights from New Castle

These prices were available within the past 7 days. Prices quoted are per person, round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Sat, May 24 - Wed, May 28

PHL

Philadelphia Intl.

STL

Lambert-St. Louis Intl.

$162 Roundtrip, found 22 hours ago

$162

Roundtrip

found 22 hours ago

Select Frontier Airlines flight, departing Sat, May 24 from Philadelphia Intl. to Lambert-St. Louis Intl., returning Wed, May 28, priced at $162 found 22 hours ago

Fri, May 30 - Mon, Jun 2

PHL

Philadelphia Intl.

STL

Lambert-St. Louis Intl.

$200 Roundtrip, found 22 hours ago

$200

Roundtrip

found 22 hours ago

Select Frontier Airlines flight, departing Fri, May 30 from Philadelphia Intl. to Lambert-St. Louis Intl., returning Mon, Jun 2, priced at $200 found 22 hours ago

Sun, May 25 - Wed, May 28

PHL

Philadelphia Intl.

STL

Lambert-St. Louis Intl.

$210 Roundtrip, found 22 hours ago

$210

Roundtrip

found 22 hours ago

Select Frontier Airlines flight, departing Sun, May 25 from Philadelphia Intl. to Lambert-St. Louis Intl., returning Wed, May 28, priced at $210 found 22 hours ago

Sun, May 25 - Sat, May 31

PHL

Philadelphia Intl.

STL

Lambert-St. Louis Intl.

$220 Roundtrip, found 22 hours ago

$220

Roundtrip

found 22 hours ago

Select Frontier Airlines flight, departing Sun, May 25 from Philadelphia Intl. to Lambert-St. Louis Intl., returning Sat, May 31, priced at $220 found 22 hours ago

Sat, May 24 - Sun, Jun 1

PHL

Philadelphia Intl.

STL

Lambert-St. Louis Intl.

$226 Roundtrip, found 22 hours ago

$226

Roundtrip

found 22 hours ago

Select Frontier Airlines flight, departing Sat, May 24 from Philadelphia Intl. to Lambert-St. Louis Intl., returning Sun, Jun 1, priced at $226 found 22 hours ago

Thu, Jun 12 - Mon, Jun 16

PHL

Philadelphia Intl.

STL

Lambert-St. Louis Intl.

$227 Roundtrip, found 6 hours ago

$227

Roundtrip

found 6 hours ago

Select Spirit Airlines flight, departing Thu, Jun 12 from Philadelphia Intl. to Lambert-St. Louis Intl., returning Mon, Jun 16, priced at $227 found 6 hours ago

Sun, May 25 - Tue, May 27

PHL

Philadelphia Intl.

STL

Lambert-St. Louis Intl.

$230 Roundtrip, found 22 hours ago

$230

Roundtrip

found 22 hours ago

Select Frontier Airlines flight, departing Sun, May 25 from Philadelphia Intl. to Lambert-St. Louis Intl., returning Tue, May 27, priced at $230 found 22 hours ago

Tue, Jun 10 - Wed, Jun 11

PHL

Philadelphia Intl.

STL

Lambert-St. Louis Intl.

$231 Roundtrip, found 6 hours ago

$231

Roundtrip

found 6 hours ago

Select Frontier Airlines flight, departing Tue, Jun 10 from Philadelphia Intl. to Lambert-St. Louis Intl., returning Wed, Jun 11, priced at $231 found 6 hours ago

Fri, Jun 6 - Tue, Jun 10

PHL

Philadelphia Intl.

STL

Lambert-St. Louis Intl.

$240 Roundtrip, found 6 hours ago

$240

Roundtrip

found 6 hours ago

Select Frontier Airlines flight, departing Fri, Jun 6 from Philadelphia Intl. to Lambert-St. Louis Intl., returning Tue, Jun 10, priced at $240 found 6 hours ago

Tue, Jun 10 - Sat, Jun 14

PHL

Philadelphia Intl.

STL

Lambert-St. Louis Intl.

$241 Roundtrip, found 6 hours ago

$241

Roundtrip

found 6 hours ago

Select Frontier Airlines flight, departing Tue, Jun 10 from Philadelphia Intl. to Lambert-St. Louis Intl., returning Sat, Jun 14, priced at $241 found 6 hours ago

Sun, May 25 - Sun, Jun 1

PHL

Philadelphia Intl.

STL

Lambert-St. Louis Intl.

$250 Roundtrip, found 22 hours ago

$250

Roundtrip

found 22 hours ago

Select Frontier Airlines flight, departing Sun, May 25 from Philadelphia Intl. to Lambert-St. Louis Intl., returning Sun, Jun 1, priced at $250 found 22 hours ago

Thu, Jun 12 - Fri, Jun 13

PHL

Philadelphia Intl.

STL

Lambert-St. Louis Intl.

$252 Roundtrip, found 6 hours ago

$252

Roundtrip

found 6 hours ago

Select Spirit Airlines flight, departing Thu, Jun 12 from Philadelphia Intl. to Lambert-St. Louis Intl., returning Fri, Jun 13, priced at $252 found 6 hours ago

Sat, Jun 7 - Wed, Jun 11

PHL

Philadelphia Intl.

STL

Lambert-St. Louis Intl.

$260 Roundtrip, found 6 hours ago

$260

Roundtrip

found 6 hours ago

Select Frontier Airlines flight, departing Sat, Jun 7 from Philadelphia Intl. to Lambert-St. Louis Intl., returning Wed, Jun 11, priced at $260 found 6 hours ago

Tue, Jun 10 - Thu, Jun 12

PHL

Philadelphia Intl.

STL

Lambert-St. Louis Intl.

$261 Roundtrip, found 6 hours ago

$261

Roundtrip

found 6 hours ago

Select Frontier Airlines flight, departing Tue, Jun 10 from Philadelphia Intl. to Lambert-St. Louis Intl., returning Thu, Jun 12, priced at $261 found 6 hours ago

Fri, Jun 6 - Mon, Jun 9

PHL

Philadelphia Intl.

STL

Lambert-St. Louis Intl.

$271 Roundtrip, found 6 hours ago

$271

Roundtrip

found 6 hours ago

Select Frontier Airlines flight, departing Fri, Jun 6 from Philadelphia Intl. to Lambert-St. Louis Intl., returning Mon, Jun 9, priced at $271 found 6 hours ago

Tue, May 27 - Tue, May 27

PHL

Philadelphia Intl.

STL

Lambert-St. Louis Intl.

$271 Roundtrip, found 22 hours ago

$271

Roundtrip

found 22 hours ago

Select Delta flight, departing Tue, May 27 from Philadelphia Intl. to Lambert-St. Louis Intl., returning Tue, May 27, priced at $271 found 22 hours ago

Fri, Jun 6 - Sat, Jun 14

PHL

Philadelphia Intl.

STL

Lambert-St. Louis Intl.

$271 Roundtrip, found 6 hours ago

$271

Roundtrip

found 6 hours ago

Select Frontier Airlines flight, departing Fri, Jun 6 from Philadelphia Intl. to Lambert-St. Louis Intl., returning Sat, Jun 14, priced at $271 found 6 hours ago

Fri, Jun 20 - Sun, Jun 22

PHL

Philadelphia Intl.

STL

Lambert-St. Louis Intl.

$337 Roundtrip, found 1 day ago

$337

Roundtrip

found 1 day ago

Select American Airlines flight, departing Fri, Jun 20 from Philadelphia Intl. to Lambert-St. Louis Intl., returning Sun, Jun 22, priced at $337 found 1 day ago

Fri, Jun 20 - Sun, Jun 22

PHL

Philadelphia Intl.

STL

Lambert-St. Louis Intl.

$366 Roundtrip, found 1 day ago

$366

Roundtrip

found 1 day ago

Select American Airlines flight, departing Fri, Jun 20 from Philadelphia Intl. to Lambert-St. Louis Intl., returning Sun, Jun 22, priced at $366 found 1 day ago

Mon, Jun 9 - Thu, Jun 12

PHL

Philadelphia Intl.

STL

Lambert-St. Louis Intl.

$389 Roundtrip, found 6 hours ago

$389

Roundtrip

found 6 hours ago

Select United flight, departing Mon, Jun 9 from Philadelphia Intl. to Lambert-St. Louis Intl., returning Thu, Jun 12, priced at $389 found 6 hours ago