DL 516 then DL 9936 at Atlanta
Dallas → Atlanta → Queretaro
Timetable, Atlanta time
09:15DL 516 from Dallas at the gate
08:00DL 9936 to Queretaro leaves the gate
22 h 45 apart on the timetable, overnight
DL 9936 leaves 22 h 45 after DL 516 arrives on the timetable: more than half a day, so not a connection we count.