B6 618 then DL 1432 at Boston
New York JFK → Boston → Detroit
Timetable, Boston time
16:59B6 618 from New York JFK at the gate
16:57DL 1432 to Detroit leaves the gate
23 h 58 apart on the timetable, overnight
DL 1432 leaves 23 h 58 after B6 618 arrives on the timetable: more than half a day, so not a connection we count.