AA 1992 then AA 1529 at Charlotte
St Louis → Charlotte → Columbus (Ohio)
Timetable, Charlotte time
08:00AA 1992 from St Louis at the gate
20:15AA 1529 to Columbus (Ohio) leaves the gate
12 h 15 apart on the timetable
AA 1529 leaves 12 h 15 after AA 1992 arrives on the timetable: more than half a day, so not a connection we count.