DL 188 then DL 9963 at Atlanta
Seoul → Atlanta → Queretaro
Timetable, Atlanta time
17:10DL 188 from Seoul at the gate
09:30DL 9963 to Queretaro leaves the gate
16 h 20 apart on the timetable, overnight
DL 9963 leaves 16 h 20 after DL 188 arrives on the timetable: more than half a day, so not a connection we count.