AA 9866 then AA 3375 at O'Hare
Marquette → Chicago → Fargo
Timetable, Chicago time
10:30AA 9866 from Marquette at the gate
09:55AA 3375 to Fargo leaves the gate
23 h 25 apart on the timetable, overnight
AA 3375 leaves 23 h 25 after AA 9866 arrives on the timetable: more than half a day, so not a connection we count.