AA 4721 then DL 962 at JFK
Boston → New York → Atlanta
Timetable, New York time
19:03AA 4721 from Boston at the gate
18:59DL 962 to Atlanta leaves the gate
23 h 56 apart on the timetable, overnight
DL 962 leaves 23 h 56 after AA 4721 arrives on the timetable: more than half a day, so not a connection we count.