DL 9941 then DL 711 at Atlanta
Queretaro → Atlanta → Las Vegas
Timetable, Atlanta time
19:43DL 9941 from Queretaro at the gate
17:15DL 711 to Las Vegas leaves the gate
21 h 32 apart on the timetable, overnight
DL 711 leaves 21 h 32 after DL 9941 arrives on the timetable: more than half a day, so not a connection we count.