DL 706 then DL 919 at Atlanta
Denver → Atlanta → Las Vegas
Timetable, Atlanta time
21:24DL 706 from Denver at the gate
18:20DL 919 to Las Vegas leaves the gate
20 h 56 apart on the timetable, overnight
DL 919 leaves 20 h 56 after DL 706 arrives on the timetable: more than half a day, so not a connection we count.