DL 9941 then DL 659 at Atlanta
Queretaro → Atlanta → Las Vegas
Timetable, Atlanta time
19:43DL 9941 from Queretaro at the gate
15:29DL 659 to Las Vegas leaves the gate
19 h 46 apart on the timetable, overnight
DL 659 leaves 19 h 46 after DL 9941 arrives on the timetable: more than half a day, so not a connection we count.