DL 1748 then DL 5101 at Detroit
Boston → Detroit → Birmingham (Alabama)
Timetable, Detroit time
11:32DL 1748 from Boston at the gate
08:40DL 5101 to Birmingham (Alabama) leaves the gate
21 h 08 apart on the timetable, overnight
DL 5101 leaves 21 h 08 after DL 1748 arrives on the timetable: more than half a day, so not a connection we count.