Philadelphia to St Louis
PHLSTL
Fly from Philadelphia to St Louis starting at USD 96 with F9.
Best fare available on May 20, 2026.
Limited seats. Better plans. Book before it's gone.
Philadelphia to St Louis cheapest flights this week
11 May
F9
17:04PHL
01:21STL
1 Stop$161VIEW DEAL
20 May
F9
20:35PHL
20:23STL
1 Stop$96VIEW DEAL
Philadelphia to St Louis monthly flight fare trend
May
from USD 96
Jun
No flights
Jul
No flights
Aug
No flights
Sep
No flights
Oct
No flights
Airport Details
Origin
Philadelphia
Philadelphia International Airport (PHL)
Philadelphia, PHL
Zone
New York
Elev
36 ft
Destination
St Louis
St. Louis Lambert International Airport (STL)
St Louis, STL
Zone
Chicago
Elev
618 ft
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