DL 5648 then DL 5702 at Boston
Charlotte → Boston → New York JFK
Timetable, Boston time
09:01DL 5648 from Charlotte at the gate
21:30DL 5702 to New York JFK leaves the gate
12 h 29 apart on the timetable
DL 5702 leaves 12 h 29 after DL 5648 arrives on the timetable: more than half a day, so not a connection we count.