DL 3848 then DL 1171 at Detroit
Milwaukee → Detroit → Boston
Timetable, Detroit time
15:28DL 3848 from Milwaukee at the gate
14:00DL 1171 to Boston leaves the gate
22 h 32 apart on the timetable, overnight
DL 1171 leaves 22 h 32 after DL 3848 arrives on the timetable: more than half a day, so not a connection we count.