AA 5585 then DL 5630 at Charlotte
Louisville → Charlotte → Boston
Timetable, Charlotte time
19:21AA 5585 from Louisville at the gate
14:37DL 5630 to Boston leaves the gate
19 h 16 apart on the timetable, overnight
DL 5630 leaves 19 h 16 after AA 5585 arrives on the timetable: more than half a day, so not a connection we count.