AA 5645 then DL 5630 at Charlotte
Pittsburgh → Charlotte → Boston
Timetable, Charlotte time
15:26AA 5645 from Pittsburgh at the gate
14:37DL 5630 to Boston leaves the gate
23 h 11 apart on the timetable, overnight
DL 5630 leaves 23 h 11 after AA 5645 arrives on the timetable: more than half a day, so not a connection we count.