AA 3493 then UA 5201 at O'Hare
Green Bay → Chicago → Milwaukee
Timetable, Chicago time
07:23AA 3493 from Green Bay at the gate
20:00UA 5201 to Milwaukee leaves the gate
12 h 37 apart on the timetable
UA 5201 leaves 12 h 37 after AA 3493 arrives on the timetable: more than half a day, so not a connection we count.