AA 5211 then AA 6003 at Charlotte
Myrtle Beach → Charlotte → Huntsville
Timetable, Charlotte time
17:25AA 5211 from Myrtle Beach at the gate
14:40AA 6003 to Huntsville leaves the gate
21 h 15 apart on the timetable, overnight
AA 6003 leaves 21 h 15 after AA 5211 arrives on the timetable: more than half a day, so not a connection we count.