WN 1638 then AA 4712 at Detroit
Chicago Midway → Detroit → Washington National
Timetable, Detroit time
17:15WN 1638 from Chicago Midway at the gate
16:46AA 4712 to Washington National leaves the gate
23 h 31 apart on the timetable, overnight
AA 4712 leaves 23 h 31 after WN 1638 arrives on the timetable: more than half a day, so not a connection we count.