St Louis to Philadelphia
STLPHL
Fly from St Louis to Philadelphia starting at USD 73 with Frontier Airlines.
Best fare available on Sep 3, 2026.
Limited seats. Better plans. Book before it's gone.
St Louis to Philadelphia cheapest flights this week
St Louis to Philadelphia monthly flight fare trend
Jul
No flights
Aug
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Sep
from USD 73
Oct
No flights
Nov
No flights
Dec
No flights
Airport Details
Origin
St Louis
St. Louis Lambert International Airport (STL)
St Louis, STL
Zone
Chicago
Elev
618 ft
Destination
Philadelphia
Philadelphia International Airport (PHL)
Philadelphia, PHL
Zone
New York
Elev
36 ft
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