AA 1225 then DL 5808 at Boston
Miami → Boston → New York JFK
Timetable, Boston time
13:55AA 1225 from Miami at the gate
13:37DL 5808 to New York JFK leaves the gate
23 h 42 apart on the timetable, overnight
DL 5808 leaves 23 h 42 after AA 1225 arrives on the timetable: more than half a day, so not a connection we count.