AA 4394 then DL 5702 at Boston
New York LaGuardia → Boston → New York JFK
Timetable, Boston time
09:07AA 4394 from New York LaGuardia at the gate
21:20DL 5702 to New York JFK leaves the gate
12 h 13 apart on the timetable
DL 5702 leaves 12 h 13 after AA 4394 arrives on the timetable: more than half a day, so not a connection we count.