AA 1138 then DL 9963 at Atlanta
Chicago O'Hare → Atlanta → Queretaro
Timetable, Atlanta time
16:02AA 1138 from Chicago O'Hare at the gate
09:30DL 9963 to Queretaro leaves the gate
17 h 28 apart on the timetable, overnight
DL 9963 leaves 17 h 28 after AA 1138 arrives on the timetable: more than half a day, so not a connection we count.