DL 2168 then DL 9963 at Atlanta
Key West → Atlanta → Queretaro
Timetable, Atlanta time
20:19DL 2168 from Key West at the gate
09:30DL 9963 to Queretaro leaves the gate
13 h 11 apart on the timetable, overnight
DL 9963 leaves 13 h 11 after DL 2168 arrives on the timetable: more than half a day, so not a connection we count.