AA 6486 then AA 4919 at O'Hare
Detroit → Chicago → Milwaukee
Timetable, Chicago time
17:29AA 6486 from Detroit at the gate
10:05AA 4919 to Milwaukee leaves the gate
16 h 36 apart on the timetable, overnight
AA 4919 leaves 16 h 36 after AA 6486 arrives on the timetable: more than half a day, so not a connection we count.