My advice to OP: Ignore this comment. Call AA and change your flights to something you are comfortable with
Originally Posted by
gemac
I have done a 35 minute connection STL-ORD-LHR. The gates were next to each other. Walk off one aircraft, walk 50 feet, get on the other aircraft. Easiest connection I've ever had. I believe that this is a normal procedure at ORD for this connection.