AA 3391 then AA 2937 at Charlotte
Hilton Head → Charlotte → St Louis
Timetable, Charlotte time
17:40AA 3391 from Hilton Head at the gate
16:34AA 2937 to St Louis leaves the gate
22 h 54 apart on the timetable, overnight
AA 2937 leaves 22 h 54 after AA 3391 arrives on the timetable: more than half a day, so not a connection we count.