DL 937 then DL 9963 at Atlanta
Tucson → Atlanta → Queretaro
Timetable, Atlanta time
20:35DL 937 from Tucson at the gate
09:30DL 9963 to Queretaro leaves the gate
12 h 55 apart on the timetable, overnight
DL 9963 leaves 12 h 55 after DL 937 arrives on the timetable: more than half a day, so not a connection we count.