DL 9941 then DL 549 at Atlanta
Queretaro → Atlanta → Las Vegas
Timetable, Atlanta time
19:43DL 9941 from Queretaro at the gate
13:00DL 549 to Las Vegas leaves the gate
17 h 17 apart on the timetable, overnight
DL 549 leaves 17 h 17 after DL 9941 arrives on the timetable: more than half a day, so not a connection we count.