DL 5765 then DL 2246 at Boston
New York JFK → Boston → Miami
Timetable, Boston time
07:20DL 5765 from New York JFK at the gate
19:25DL 2246 to Miami leaves the gate
12 h 05 apart on the timetable
DL 2246 leaves 12 h 05 after DL 5765 arrives on the timetable: more than half a day, so not a connection we count.