St Louis to Phoenix
STLPHX
Fly from St Louis to Phoenix starting at USD 143 with Frontier Airlines.
Best fare available on Oct 15, 2026.
Limited seats. Better plans. Book before it's gone.
St Louis to Phoenix cheapest flights this week
St Louis to Phoenix monthly flight fare trend
Jul
No flights
Aug
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Sep
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Oct
from USD 143
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
Phoenix
Phoenix Sky Harbor International Airport (PHX)
Phoenix, PHX
Zone
Phoenix
Elev
1135 ft
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