AA 9950 then AA 4920 at O'Hare
Philadelphia → Chicago → Milwaukee
Timetable, Chicago time
13:49AA 9950 from Philadelphia at the gate
13:20AA 4920 to Milwaukee leaves the gate
23 h 31 apart on the timetable, overnight
AA 4920 leaves 23 h 31 after AA 9950 arrives on the timetable: more than half a day, so not a connection we count.