AA 5847 then AA 2686 at Charlotte
Augusta → Charlotte → St Louis
Timetable, Charlotte time
06:15AA 5847 from Augusta at the gate
18:17AA 2686 to St Louis leaves the gate
12 h 02 apart on the timetable
AA 2686 leaves 12 h 02 after AA 5847 arrives on the timetable: more than half a day, so not a connection we count.