Philadelphia to St Louis

PHLSTL

Fly from Philadelphia to St Louis starting at SAR 289 with Frontier Airlines.Best fare available on Sep 21, 2026.Limited seats. Better plans. Book before it's gone.

Philadelphia to St Louis cheapest flights this week

20 Sept
Frontier Airlines
17:32PHL
14:10STL
1 StopSAR 296VIEW DEAL
20 Sept
Frontier Airlines
10:10PHL
17:34STL
1 StopSAR 411VIEW DEAL
21 Sept
Frontier Airlines
08:41PHL
14:10STL
1 StopSAR 289VIEW DEAL
19 Oct
Frontier Airlines
10:15PHL
20:39STL
1 StopSAR 496VIEW DEAL

Philadelphia to St Louis monthly flight fare trend

Sep
from SAR 289
Oct
from SAR 496
Nov
No flights
Dec
No flights
Jan
No flights
Feb
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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