DL 1625 then B6 1520 at Atlanta
Memphis → Atlanta → New York JFK
Timetable, Atlanta time
10:30DL 1625 from Memphis at the gate
10:09B6 1520 to New York JFK leaves the gate
23 h 39 apart on the timetable, overnight
B6 1520 leaves 23 h 39 after DL 1625 arrives on the timetable: more than half a day, so not a connection we count.