AA 4448 then DL 1480 at JFK
Boston → New York → Atlanta
Timetable, New York time
14:10AA 4448 from Boston at the gate
14:00DL 1480 to Atlanta leaves the gate
23 h 50 apart on the timetable, overnight
DL 1480 leaves 23 h 50 after AA 4448 arrives on the timetable: more than half a day, so not a connection we count.