Chicago to St Louis
ORDSTL
Fly from Chicago to St Louis starting at USD 168 with UA.
Best fare available on Aug 22, 2026.
Limited seats. Better plans. Book before it's gone.
Chicago to St Louis cheapest flights this week
22 Aug
UA
18:00ORD
19:31STL
Direct$168VIEW DEAL
23 Aug
UA
14:08ORD
15:38STL
Direct$168VIEW DEAL
1 Feb
AA
19:45ORD
21:10STL
Direct$182VIEW DEAL
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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