AA 5198 then DL 5630 at Charlotte
Nashville → Charlotte → Boston
Timetable, Charlotte time
15:40AA 5198 from Nashville at the gate
14:37DL 5630 to Boston leaves the gate
22 h 57 apart on the timetable, overnight
DL 5630 leaves 22 h 57 after AA 5198 arrives on the timetable: more than half a day, so not a connection we count.