DL 539 then DL 9963 at Atlanta
Portland (Oregon) → Atlanta → Queretaro
Timetable, Atlanta time
19:27DL 539 from Portland (Oregon) at the gate
09:30DL 9963 to Queretaro leaves the gate
14 h 03 apart on the timetable, overnight
DL 9963 leaves 14 h 03 after DL 539 arrives on the timetable: more than half a day, so not a connection we count.