DL 8839 then DL 5630 at Boston
Memphis → Boston → Charlotte
Timetable, Boston time
13:30DL 8839 from Memphis at the gate
11:15DL 5630 to Charlotte leaves the gate
21 h 45 apart on the timetable, overnight
DL 5630 leaves 21 h 45 after DL 8839 arrives on the timetable: more than half a day, so not a connection we count.