DL 5122 then DL 3964 at Detroit
Louisville → Detroit → Saginaw
Timetable, Detroit time
16:44DL 5122 from Louisville at the gate
16:35DL 3964 to Saginaw leaves the gate
23 h 51 apart on the timetable, overnight
DL 3964 leaves 23 h 51 after DL 5122 arrives on the timetable: more than half a day, so not a connection we count.