Chicago to St Louis
ORDSTL
Fly from Chicago to St Louis starting at USD 168 with United Airlines.
Best fare available on Aug 22, 2026.
Limited seats. Better plans. Book before it's gone.
Chicago to St Louis cheapest flights this week
Chicago to St Louis monthly flight fare trend
May
from USD 161
Jun
No flights
Jul
No flights
Aug
from USD 168
Sep
No flights
Oct
No flights
Airport Details
Origin
Chicago
Chicago O'Hare International Airport (ORD)
Chicago, ORD
Zone
Chicago
Elev
680 ft
Destination
St Louis
St. Louis Lambert International Airport (STL)
St Louis, STL
Zone
Chicago
Elev
618 ft
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