F9 2387 then DL 5626 at Charlotte
Philadelphia → Charlotte → Boston
Timetable, Charlotte time
10:40F9 2387 from Philadelphia at the gate
09:50DL 5626 to Boston leaves the gate
23 h 10 apart on the timetable, overnight
DL 5626 leaves 23 h 10 after F9 2387 arrives on the timetable: more than half a day, so not a connection we count.