AA 9866 then AA 802 at O'Hare
Marquette → Chicago → Boston
Timetable, Chicago time
10:30AA 9866 from Marquette at the gate
08:30AA 802 to Boston leaves the gate
22 h apart on the timetable, overnight
AA 802 leaves 22 h after AA 9866 arrives on the timetable: more than half a day, so not a connection we count.