AA 5992 then AA 3990 at Charlotte
Tri-Cities → Charlotte → Columbia Regional
Timetable, Charlotte time
08:25AA 5992 from Tri-Cities at the gate
21:20AA 3990 to Columbia Regional leaves the gate
12 h 55 apart on the timetable
AA 3990 leaves 12 h 55 after AA 5992 arrives on the timetable: more than half a day, so not a connection we count.