DL 927 then DL 9963 at Atlanta
Las Vegas → Atlanta → Queretaro
Timetable, Atlanta time
16:40DL 927 from Las Vegas at the gate
09:30DL 9963 to Queretaro leaves the gate
16 h 50 apart on the timetable, overnight
DL 9963 leaves 16 h 50 after DL 927 arrives on the timetable: more than half a day, so not a connection we count.