DL 677 then DL 5227 at Atlanta
Las Vegas → Atlanta → Roanoke
Timetable, Atlanta time
13:54DL 677 from Las Vegas at the gate
13:23DL 5227 to Roanoke leaves the gate
23 h 29 apart on the timetable, overnight
DL 5227 leaves 23 h 29 after DL 677 arrives on the timetable: more than half a day, so not a connection we count.