AA 6486 then AA 775 at O'Hare
Detroit → Chicago → Washington National
Timetable, Chicago time
17:29AA 6486 from Detroit at the gate
09:50AA 775 to Washington National leaves the gate
16 h 21 apart on the timetable, overnight
AA 775 leaves 16 h 21 after AA 6486 arrives on the timetable: more than half a day, so not a connection we count.