AA 4708 then DL 5702 at Boston
Harrisburg → Boston → New York JFK
Timetable, Boston time
08:34AA 4708 from Harrisburg at the gate
21:20DL 5702 to New York JFK leaves the gate
12 h 46 apart on the timetable
DL 5702 leaves 12 h 46 after AA 4708 arrives on the timetable: more than half a day, so not a connection we count.