AA 1652 then UA 5201 at O'Hare
Philadelphia → Chicago → Milwaukee
Timetable, Chicago time
07:27AA 1652 from Philadelphia at the gate
20:00UA 5201 to Milwaukee leaves the gate
12 h 33 apart on the timetable
UA 5201 leaves 12 h 33 after AA 1652 arrives on the timetable: more than half a day, so not a connection we count.