DL 5122 then DL 4989 at Detroit
Louisville → Detroit → Knoxville
Timetable, Detroit time
16:44DL 5122 from Louisville at the gate
16:10DL 4989 to Knoxville leaves the gate
23 h 26 apart on the timetable, overnight
DL 4989 leaves 23 h 26 after DL 5122 arrives on the timetable: more than half a day, so not a connection we count.