Phoenix to St Louis
PHXSTL
Fly from Phoenix to St Louis starting at USD 186 with Frontier Airlines.
Best fare available on Jun 26, 2026.
Limited seats. Better plans. Book before it's gone.
Phoenix to St Louis cheapest flights this week
Phoenix to St Louis monthly flight fare trend
Jun
from USD 91
Jul
No flights
Aug
No flights
Sep
No flights
Oct
No flights
Nov
No flights
Airport Details
Origin
Phoenix
Phoenix Sky Harbor International Airport (PHX)
Phoenix, PHX
Zone
Phoenix
Elev
1135 ft
Destination
St Louis
St. Louis Lambert International Airport (STL)
St Louis, STL
Zone
Chicago
Elev
618 ft
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