AA 5198 then AA 5258 at Charlotte
Nashville → Charlotte → Lexington
Timetable, Charlotte time
17:40AA 5198 from Nashville at the gate
17:16AA 5258 to Lexington leaves the gate
23 h 36 apart on the timetable, overnight
AA 5258 leaves 23 h 36 after AA 5198 arrives on the timetable: more than half a day, so not a connection we count.