DL 2847 then B6 618 at JFK
New Orleans → New York → Boston
Timetable, New York time
15:27DL 2847 from New Orleans at the gate
15:14B6 618 to Boston leaves the gate
23 h 47 apart on the timetable, overnight
B6 618 leaves 23 h 47 after DL 2847 arrives on the timetable: more than half a day, so not a connection we count.