DL 5232 then DL 5122 at Detroit
Memphis → Detroit → Louisville
Timetable, Detroit time
20:50DL 5232 from Memphis at the gate
12:30DL 5122 to Louisville leaves the gate
15 h 40 apart on the timetable, overnight
DL 5122 leaves 15 h 40 after DL 5232 arrives on the timetable: more than half a day, so not a connection we count.