DL 2857 then DL 9963 at Atlanta
Harrisburg → Atlanta → Queretaro
Timetable, Atlanta time
20:34DL 2857 from Harrisburg at the gate
09:30DL 9963 to Queretaro leaves the gate
12 h 56 apart on the timetable, overnight
DL 9963 leaves 12 h 56 after DL 2857 arrives on the timetable: more than half a day, so not a connection we count.