DL 3977 then DL 5101 at Detroit
Lexington → Detroit → Birmingham (Alabama)
Timetable, Detroit time
09:05DL 3977 from Lexington at the gate
08:40DL 5101 to Birmingham (Alabama) leaves the gate
23 h 35 apart on the timetable, overnight
DL 5101 leaves 23 h 35 after DL 3977 arrives on the timetable: more than half a day, so not a connection we count.