AA 660 then DL 5138 at Detroit
Dallas-Fort Worth → Detroit → Knoxville
Timetable, Detroit time
18:34AA 660 from Dallas-Fort Worth at the gate
18:10DL 5138 to Knoxville leaves the gate
23 h 36 apart on the timetable, overnight
DL 5138 leaves 23 h 36 after AA 660 arrives on the timetable: more than half a day, so not a connection we count.