Philadelphia to St Louis

PHLSTL

Fly from Philadelphia to St Louis starting at SAR 496 with Frontier Airlines.Best fare available on Oct 19, 2026.Limited seats. Better plans. Book before it's gone.

Philadelphia to St Louis cheapest flights this week

8 Aug
Frontier Airlines
16:30PHL
18:37STL
1 StopSAR 511VIEW DEAL
15 Aug
Frontier Airlines
17:52PHL
00:59STL
1 StopSAR 629VIEW DEAL
19 Oct
Frontier Airlines
10:15PHL
20:39STL
1 StopSAR 496VIEW DEAL

Philadelphia to St Louis monthly flight fare trend

Aug
from SAR 511
Sep
No flights
Oct
from SAR 496
Nov
No flights
Dec
No flights
Jan
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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