DL 850 then DL 9963 at Atlanta
Washington National → Atlanta → Queretaro
Timetable, Atlanta time
20:29DL 850 from Washington National at the gate
09:30DL 9963 to Queretaro leaves the gate
13 h 01 apart on the timetable, overnight
DL 9963 leaves 13 h 01 after DL 850 arrives on the timetable: more than half a day, so not a connection we count.