AA 6078 then AA 2654 at Charlotte
Harrisburg → Charlotte → Las Vegas
Timetable, Charlotte time
07:58AA 6078 from Harrisburg at the gate
20:17AA 2654 to Las Vegas leaves the gate
12 h 19 apart on the timetable
AA 2654 leaves 12 h 19 after AA 6078 arrives on the timetable: more than half a day, so not a connection we count.