DL 512 then DL 9963 at Atlanta
Dallas → Atlanta → Queretaro
Timetable, Atlanta time
18:59DL 512 from Dallas at the gate
09:30DL 9963 to Queretaro leaves the gate
14 h 31 apart on the timetable, overnight
DL 9963 leaves 14 h 31 after DL 512 arrives on the timetable: more than half a day, so not a connection we count.