Flights from St. Louis to Port Mahon

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 - Wed, Aug 20

STL

Lambert-St. Louis Intl.

PHL

Philadelphia Intl.

$224 Roundtrip, found 5 hours ago

$224

Roundtrip

found 5 hours ago

Select Frontier Airlines flight, departing Wed, Aug 13 from Lambert-St. Louis Intl. to Philadelphia Intl., returning Wed, Aug 20, priced at $224 found 5 hours ago

Wed, Aug 13 - Sun, Aug 17

STL

Lambert-St. Louis Intl.

PHL

Philadelphia Intl.

$236 Roundtrip, found 5 hours ago

$236

Roundtrip

found 5 hours ago

Select Frontier Airlines flight, departing Wed, Aug 13 from Lambert-St. Louis Intl. to Philadelphia Intl., returning Sun, Aug 17, priced at $236 found 5 hours ago

Wed, Aug 13 - Sat, Aug 16

STL

Lambert-St. Louis Intl.

PHL

Philadelphia Intl.

$247 Roundtrip, found 5 hours ago

$247

Roundtrip

found 5 hours ago

Select Frontier Airlines flight, departing Wed, Aug 13 from Lambert-St. Louis Intl. to Philadelphia Intl., returning Sat, Aug 16, priced at $247 found 5 hours ago

Mon, Aug 11 - Sun, Aug 17

STL

Lambert-St. Louis Intl.

PHL

Philadelphia Intl.

$248 Roundtrip, found 5 hours ago

$248

Roundtrip

found 5 hours ago

Select Frontier Airlines flight, departing Mon, Aug 11 from Lambert-St. Louis Intl. to Philadelphia Intl., returning Sun, Aug 17, priced at $248 found 5 hours ago

Mon, Aug 11 - Sat, Aug 16

STL

Lambert-St. Louis Intl.

PHL

Philadelphia Intl.

$259 Roundtrip, found 5 hours ago

$259

Roundtrip

found 5 hours ago

Select Frontier Airlines flight, departing Mon, Aug 11 from Lambert-St. Louis Intl. to Philadelphia Intl., returning Sat, Aug 16, priced at $259 found 5 hours ago

Tue, Aug 12 - Sat, Aug 16

STL

Lambert-St. Louis Intl.

PHL

Philadelphia Intl.

$270 Roundtrip, found 5 hours ago

$270

Roundtrip

found 5 hours ago

Select Frontier Airlines flight, departing Tue, Aug 12 from Lambert-St. Louis Intl. to Philadelphia Intl., returning Sat, Aug 16, priced at $270 found 5 hours ago

Fri, Aug 15 - Sat, Aug 16

STL

Lambert-St. Louis Intl.

PHL

Philadelphia Intl.

$279 Roundtrip, found 5 hours ago

$279

Roundtrip

found 5 hours ago

Select Frontier Airlines flight, departing Fri, Aug 15 from Lambert-St. Louis Intl. to Philadelphia Intl., returning Sat, Aug 16, priced at $279 found 5 hours ago

Tue, Aug 12 - Tue, Aug 19

STL

Lambert-St. Louis Intl.

PHL

Philadelphia Intl.

$353 Roundtrip, found 5 hours ago

$353

Roundtrip

found 5 hours ago

Select Delta flight, departing Tue, Aug 12 from Lambert-St. Louis Intl. to Philadelphia Intl., returning Tue, Aug 19, priced at $353 found 5 hours ago

Wed, Aug 13 - Wed, Aug 13

STL

Lambert-St. Louis Intl.

PHL

Philadelphia Intl.

$357 Roundtrip, found 5 hours ago

$357

Roundtrip

found 5 hours ago

Select Delta flight, departing Wed, Aug 13 from Lambert-St. Louis Intl. to Philadelphia Intl., returning Wed, Aug 13, priced at $357 found 5 hours ago

Mon, Aug 11 - Tue, Aug 19

STL

Lambert-St. Louis Intl.

PHL

Philadelphia Intl.

$371 Roundtrip, found 5 hours ago

$371

Roundtrip

found 5 hours ago

Select Delta flight, departing Mon, Aug 11 from Lambert-St. Louis Intl. to Philadelphia Intl., returning Tue, Aug 19, priced at $371 found 5 hours ago

Fri, Aug 15 - Tue, Aug 19

STL

Lambert-St. Louis Intl.

PHL

Philadelphia Intl.

$383 Roundtrip, found 5 hours ago

$383

Roundtrip

found 5 hours ago

Select Delta flight, departing Fri, Aug 15 from Lambert-St. Louis Intl. to Philadelphia Intl., returning Tue, Aug 19, priced at $383 found 5 hours ago

Sat, Aug 16 - Sat, Aug 16

STL

Lambert-St. Louis Intl.

PHL

Philadelphia Intl.

$389 Roundtrip, found 5 hours ago

$389

Roundtrip

found 5 hours ago

Select Delta flight, departing Sat, Aug 16 from Lambert-St. Louis Intl. to Philadelphia Intl., returning Sat, Aug 16, priced at $389 found 5 hours ago

Sun, Aug 10 - Tue, Aug 19

STL

Lambert-St. Louis Intl.

PHL

Philadelphia Intl.

$398 Roundtrip, found 5 hours ago

$398

Roundtrip

found 5 hours ago

Select Delta flight, departing Sun, Aug 10 from Lambert-St. Louis Intl. to Philadelphia Intl., returning Tue, Aug 19, priced at $398 found 5 hours ago

Fri, Aug 15 - Fri, Aug 15

STL

Lambert-St. Louis Intl.

PHL

Philadelphia Intl.

$439 Roundtrip, found 5 hours ago

$439

Roundtrip

found 5 hours ago

Select American Airlines flight, departing Fri, Aug 15 from Lambert-St. Louis Intl. to Philadelphia Intl., returning Fri, Aug 15, priced at $439 found 5 hours ago