AA 6486 then AA 4920 at O'Hare
Detroit → Chicago → Milwaukee
Timetable, Chicago time
17:29AA 6486 from Detroit at the gate
13:20AA 4920 to Milwaukee leaves the gate
19 h 51 apart on the timetable, overnight
AA 4920 leaves 19 h 51 after AA 6486 arrives on the timetable: more than half a day, so not a connection we count.