AA 5903 then AA 5585 at Charlotte
Mobile → Charlotte → Roanoke
Timetable, Charlotte time
14:55AA 5903 from Mobile at the gate
11:30AA 5585 to Roanoke leaves the gate
20 h 35 apart on the timetable, overnight
AA 5585 leaves 20 h 35 after AA 5903 arrives on the timetable: more than half a day, so not a connection we count.