AA 5988 then AA 750 at Charlotte
Roanoke → Charlotte → Las Vegas
Timetable, Charlotte time
15:40AA 5988 from Roanoke at the gate
14:14AA 750 to Las Vegas leaves the gate
22 h 34 apart on the timetable, overnight
AA 750 leaves 22 h 34 after AA 5988 arrives on the timetable: more than half a day, so not a connection we count.