AA 9866 then AA 5014 at O'Hare
Marquette → Chicago → Indianapolis
Timetable, Chicago time
10:30AA 9866 from Marquette at the gate
09:50AA 5014 to Indianapolis leaves the gate
23 h 20 apart on the timetable, overnight
AA 5014 leaves 23 h 20 after AA 9866 arrives on the timetable: more than half a day, so not a connection we count.