AA 3515 then UA 5201 at O'Hare
Appleton → Chicago → Milwaukee
Timetable, Chicago time
07:12AA 3515 from Appleton at the gate
20:00UA 5201 to Milwaukee leaves the gate
12 h 48 apart on the timetable
UA 5201 leaves 12 h 48 after AA 3515 arrives on the timetable: more than half a day, so not a connection we count.