DL 5725 then B6 1337 at Boston
New York LaGuardia → Boston → Detroit
Timetable, Boston time
18:28DL 5725 from New York LaGuardia at the gate
18:15B6 1337 to Detroit leaves the gate
23 h 47 apart on the timetable, overnight
B6 1337 leaves 23 h 47 after DL 5725 arrives on the timetable: more than half a day, so not a connection we count.