DL 597 then DL 9963 at Atlanta
Cancún → Atlanta → Queretaro
Timetable, Atlanta time
17:39DL 597 from Cancún at the gate
09:30DL 9963 to Queretaro leaves the gate
15 h 51 apart on the timetable, overnight
DL 9963 leaves 15 h 51 after DL 597 arrives on the timetable: more than half a day, so not a connection we count.