$149 Cheap United flights St. Louis (STL) to Philadelphia (PHL)

View $149 flight on Tue, Jul 22, 2025Opens in a new window

$149 Cheap United flights St. Louis (STL) to Philadelphia (PHL)

Prices were available within the past 7 days and start at $149 for one-way flights and $314 for roundtrip, for the period specified. Prices and availability are subject to change. Additional terms apply.
United
Tue, Jul 22 - Sat, Jul 26
STL
St. Louis
PHL
Philadelphia
$314
Roundtrip
Found 1 day ago
Select United flight, departing Tue, Jul 22 from St. Louis to Philadelphia, returning Sat, Jul 26, priced at $314 Found 1 day ago
United
Tue, Jul 22 - Sat, Jul 26
STL
St. Louis
PHL
Philadelphia
$326
Roundtrip
Found 1 day ago
Select United flight, departing Tue, Jul 22 from St. Louis to Philadelphia, returning Sat, Jul 26, priced at $326 Found 1 day ago
United
Tue, Jul 22 - Sat, Jul 26
STL
St. Louis
PHL
Philadelphia
$348
Roundtrip
Found 1 day ago
Select United flight, departing Tue, Jul 22 from St. Louis to Philadelphia, returning Sat, Jul 26, priced at $348 Found 1 day ago
United
Tue, Jul 22 - Sat, Jul 26
STL
St. Louis
PHL
Philadelphia
$350
Roundtrip
Found 1 day ago
Select United flight, departing Tue, Jul 22 from St. Louis to Philadelphia, returning Sat, Jul 26, priced at $350 Found 1 day ago
United
Tue, Jul 22 - Sat, Jul 26
STL
St. Louis
PHL
Philadelphia
$378
Roundtrip
Found 1 day ago
Select United flight, departing Tue, Jul 22 from St. Louis to Philadelphia, returning Sat, Jul 26, priced at $378 Found 1 day ago
Flights from St. Louis (STL) to Philadelphia (PHL)
Origin airport
Lambert-St. Louis Intl.
Destination airport
Philadelphia Intl.
Distance
1298 km
Average flight time
3 hours 14 mins