OO 391 then AA 4712 at Detroit
Chicago O'Hare → Detroit → Washington National
Timetable, Detroit time
16:53OO 391 from Chicago O'Hare at the gate
16:46AA 4712 to Washington National leaves the gate
23 h 53 apart on the timetable, overnight
AA 4712 leaves 23 h 53 after OO 391 arrives on the timetable: more than half a day, so not a connection we count.