AA 6486 then AA 843 at O'Hare
Detroit → Chicago → Washington National
Timetable, Chicago time
17:29AA 6486 from Detroit at the gate
14:55AA 843 to Washington National leaves the gate
21 h 26 apart on the timetable, overnight
AA 843 leaves 21 h 26 after AA 6486 arrives on the timetable: more than half a day, so not a connection we count.