AA 9866 then AA 3134 at O'Hare
Marquette → Chicago → San Diego
Timetable, Chicago time
10:30AA 9866 from Marquette at the gate
10:04AA 3134 to San Diego leaves the gate
23 h 34 apart on the timetable, overnight
AA 3134 leaves 23 h 34 after AA 9866 arrives on the timetable: more than half a day, so not a connection we count.