DL 5706 then B6 1337 at Boston
Philadelphia → Boston → Detroit
Timetable, Boston time
18:30DL 5706 from Philadelphia at the gate
18:15B6 1337 to Detroit leaves the gate
23 h 45 apart on the timetable, overnight
B6 1337 leaves 23 h 45 after DL 5706 arrives on the timetable: more than half a day, so not a connection we count.