DL 748 then DL 5258 at Atlanta
Las Vegas → Atlanta → Knoxville
Timetable, Atlanta time
19:25DL 748 from Las Vegas at the gate
17:45DL 5258 to Knoxville leaves the gate
22 h 20 apart on the timetable, overnight
DL 5258 leaves 22 h 20 after DL 748 arrives on the timetable: more than half a day, so not a connection we count.