AA 5275 then AA 5318 at Charlotte
Harrisburg → Charlotte → Lexington
Timetable, Charlotte time
19:34AA 5275 from Harrisburg at the gate
19:28AA 5318 to Lexington leaves the gate
23 h 54 apart on the timetable, overnight
AA 5318 leaves 23 h 54 after AA 5275 arrives on the timetable: more than half a day, so not a connection we count.