Chicago to St Louis
ORDSTL
Fly from Chicago to St Louis starting at USD 111 with UA.
Best fare available on Apr 29, 2026.
Limited seats. Better plans. Book before it's gone.
Chicago to St Louis cheapest flights this week
23 Apr
0P
20:20ORD
--:--STL
Direct$127VIEW DEAL
25 Apr
UA
09:15ORD
--:--STL
Direct$116VIEW DEAL
27 Apr
G7
20:20ORD
--:--STL
Direct$129VIEW DEAL
29 Apr
UA
07:00ORD
--:--STL
Direct$111VIEW DEAL
6 May
F9
21:37ORD
--:--STL
1 Stop$161VIEW DEAL
22 Aug
UA
18:00ORD
--:--STL
Direct$168VIEW DEAL
23 Aug
UA
14:08ORD
--:--STL
Direct$168VIEW DEAL
1 Feb
AA
19:45ORD
--:--STL
Direct$182VIEW DEAL
Chicago to St Louis monthly flight fare trend
Apr
from USD 111
May
from USD 161
Jun
No flights
Jul
No flights
Aug
from USD 168
Sep
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
