Flights from St. Louis to Great Valley

Cheapest flights from St. Louis

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.

Wed, Aug 13 - Mon, Aug 18

STL

Lambert-St. Louis Intl.

PHL

Philadelphia Intl.

$237 Roundtrip, found 6 days ago

$237

Roundtrip

found 6 days ago

Select Frontier Airlines flight, departing Wed, Aug 13 from Lambert-St. Louis Intl. to Philadelphia Intl., returning Mon, Aug 18, priced at $237 found 6 days ago

Wed, Aug 13 - Tue, Aug 19

STL

Lambert-St. Louis Intl.

PHL

Philadelphia Intl.

$247 Roundtrip, found 6 days ago

$247

Roundtrip

found 6 days ago

Select Delta flight, departing Wed, Aug 13 from Lambert-St. Louis Intl. to Philadelphia Intl., returning Tue, Aug 19, priced at $247 found 6 days ago

Mon, Aug 11 - Mon, Aug 18

STL

Lambert-St. Louis Intl.

PHL

Philadelphia Intl.

$247 Roundtrip, found 6 days ago

$247

Roundtrip

found 6 days ago

Select Frontier Airlines flight, departing Mon, Aug 11 from Lambert-St. Louis Intl. to Philadelphia Intl., returning Mon, Aug 18, priced at $247 found 6 days ago

Wed, Aug 13 - Sat, Aug 16

STL

Lambert-St. Louis Intl.

PHL

Philadelphia Intl.

$260 Roundtrip, found 6 days ago

$260

Roundtrip

found 6 days ago

Select Frontier Airlines flight, departing Wed, Aug 13 from Lambert-St. Louis Intl. to Philadelphia Intl., returning Sat, Aug 16, priced at $260 found 6 days ago

Mon, Jun 23 - Sat, Jun 28

STL

Lambert-St. Louis Intl.

PHL

Philadelphia Intl.

$270 Roundtrip, found 4 days ago

$270

Roundtrip

found 4 days ago

Select Frontier Airlines flight, departing Mon, Jun 23 from Lambert-St. Louis Intl. to Philadelphia Intl., returning Sat, Jun 28, priced at $270 found 4 days ago

Mon, Jun 30 - Thu, Jul 3

STL

Lambert-St. Louis Intl.

PHL

Philadelphia Intl.

$274 Roundtrip, found 11 hours ago

$274

Roundtrip

found 11 hours ago

Select Spirit Airlines flight, departing Mon, Jun 30 from Lambert-St. Louis Intl. to Philadelphia Intl., returning Thu, Jul 3, priced at $274 found 11 hours ago

Fri, Jun 27 - Sun, Jun 29

STL

Lambert-St. Louis Intl.

PHL

Philadelphia Intl.

$276 Roundtrip, found 4 days ago

$276

Roundtrip

found 4 days ago

Select Spirit Airlines flight, departing Fri, Jun 27 from Lambert-St. Louis Intl. to Philadelphia Intl., returning Sun, Jun 29, priced at $276 found 4 days ago

Mon, Aug 11 - Wed, Aug 13

STL

Lambert-St. Louis Intl.

PHL

Philadelphia Intl.

$280 Roundtrip, found 6 days ago

$280

Roundtrip

found 6 days ago

Select Frontier Airlines flight, departing Mon, Aug 11 from Lambert-St. Louis Intl. to Philadelphia Intl., returning Wed, Aug 13, priced at $280 found 6 days ago

Mon, Jun 30 - Mon, Jul 7

STL

Lambert-St. Louis Intl.

PHL

Philadelphia Intl.

$284 Roundtrip, found 11 hours ago

$284

Roundtrip

found 11 hours ago

Select Spirit Airlines flight, departing Mon, Jun 30 from Lambert-St. Louis Intl. to Philadelphia Intl., returning Mon, Jul 7, priced at $284 found 11 hours ago

Mon, Aug 11 - Tue, Aug 19

STL

Lambert-St. Louis Intl.

PHL

Philadelphia Intl.

$286 Roundtrip, found 6 days ago

$286

Roundtrip

found 6 days ago

Select Delta flight, departing Mon, Aug 11 from Lambert-St. Louis Intl. to Philadelphia Intl., returning Tue, Aug 19, priced at $286 found 6 days ago

Fri, Jun 27 - Mon, Jun 30

STL

Lambert-St. Louis Intl.

PHL

Philadelphia Intl.

$286 Roundtrip, found 4 days ago

$286

Roundtrip

found 4 days ago

Select Spirit Airlines flight, departing Fri, Jun 27 from Lambert-St. Louis Intl. to Philadelphia Intl., returning Mon, Jun 30, priced at $286 found 4 days ago

Mon, Jun 30 - Sun, Jul 6

STL

Lambert-St. Louis Intl.

PHL

Philadelphia Intl.

$294 Roundtrip, found 11 hours ago

$294

Roundtrip

found 11 hours ago

Select Spirit Airlines flight, departing Mon, Jun 30 from Lambert-St. Louis Intl. to Philadelphia Intl., returning Sun, Jul 6, priced at $294 found 11 hours ago

Fri, Aug 15 - Tue, Aug 19

STL

Lambert-St. Louis Intl.

PHL

Philadelphia Intl.

$305 Roundtrip, found 6 days ago

$305

Roundtrip

found 6 days ago

Select Delta flight, departing Fri, Aug 15 from Lambert-St. Louis Intl. to Philadelphia Intl., returning Tue, Aug 19, priced at $305 found 6 days ago

Tue, Aug 12 - Wed, Aug 13

STL

Lambert-St. Louis Intl.

PHL

Philadelphia Intl.

$310 Roundtrip, found 6 days ago

$310

Roundtrip

found 6 days ago

Select Frontier Airlines flight, departing Tue, Aug 12 from Lambert-St. Louis Intl. to Philadelphia Intl., returning Wed, Aug 13, priced at $310 found 6 days ago

Tue, Aug 12 - Tue, Aug 19

STL

Lambert-St. Louis Intl.

PHL

Philadelphia Intl.

$312 Roundtrip, found 6 days ago

$312

Roundtrip

found 6 days ago

Select Delta flight, departing Tue, Aug 12 from Lambert-St. Louis Intl. to Philadelphia Intl., returning Tue, Aug 19, priced at $312 found 6 days ago

Sat, Aug 16 - Tue, Aug 19

STL

Lambert-St. Louis Intl.

PHL

Philadelphia Intl.

$326 Roundtrip, found 6 days ago

$326

Roundtrip

found 6 days ago

Select Delta flight, departing Sat, Aug 16 from Lambert-St. Louis Intl. to Philadelphia Intl., returning Tue, Aug 19, priced at $326 found 6 days ago

Fri, Jun 27 - Thu, Jul 3

STL

Lambert-St. Louis Intl.

PHL

Philadelphia Intl.

$331 Roundtrip, found 11 hours ago

$331

Roundtrip

found 11 hours ago

Select Spirit Airlines flight, departing Fri, Jun 27 from Lambert-St. Louis Intl. to Philadelphia Intl., returning Thu, Jul 3, priced at $331 found 11 hours ago

Fri, Jun 27 - Mon, Jul 7

STL

Lambert-St. Louis Intl.

PHL

Philadelphia Intl.

$341 Roundtrip, found 11 hours ago

$341

Roundtrip

found 11 hours ago

Select Spirit Airlines flight, departing Fri, Jun 27 from Lambert-St. Louis Intl. to Philadelphia Intl., returning Mon, Jul 7, priced at $341 found 11 hours ago

Sat, Aug 16 - Sat, Aug 16

STL

Lambert-St. Louis Intl.

PHL

Philadelphia Intl.

$355 Roundtrip, found 6 days ago

$355

Roundtrip

found 6 days ago

Select United flight, departing Sat, Aug 16 from Lambert-St. Louis Intl. to Philadelphia Intl., returning Sat, Aug 16, priced at $355 found 6 days ago

Mon, Jun 30 - Mon, Jun 30

STL

Lambert-St. Louis Intl.

PHL

Philadelphia Intl.

$417 Roundtrip, found 11 hours ago

$417

Roundtrip

found 11 hours ago

Select American Airlines flight, departing Mon, Jun 30 from Lambert-St. Louis Intl. to Philadelphia Intl., returning Mon, Jun 30, priced at $417 found 11 hours ago