F9 4353 then DL 5630 at Charlotte
Philadelphia → Charlotte → Boston
Timetable, Charlotte time
16:40F9 4353 from Philadelphia at the gate
14:37DL 5630 to Boston leaves the gate
21 h 57 apart on the timetable, overnight
DL 5630 leaves 21 h 57 after F9 4353 arrives on the timetable: more than half a day, so not a connection we count.