DL 502 then DL 5138 at Detroit
Las Vegas → Detroit → Knoxville
Timetable, Detroit time
06:07DL 502 from Las Vegas at the gate
19:55DL 5138 to Knoxville leaves the gate
13 h 48 apart on the timetable
DL 5138 leaves 13 h 48 after DL 502 arrives on the timetable: more than half a day, so not a connection we count.