DL 346 then DL 9963 at Atlanta
Denver → Atlanta → Queretaro
Timetable, Atlanta time
15:20DL 346 from Denver at the gate
09:30DL 9963 to Queretaro leaves the gate
18 h 10 apart on the timetable, overnight
DL 9963 leaves 18 h 10 after DL 346 arrives on the timetable: more than half a day, so not a connection we count.