AA 3040 then UA 6016 at O'Hare
Atlanta → Chicago → Green Bay
Timetable, Chicago time
08:33AA 3040 from Atlanta at the gate
21:25UA 6016 to Green Bay leaves the gate
12 h 52 apart on the timetable
UA 6016 leaves 12 h 52 after AA 3040 arrives on the timetable: more than half a day, so not a connection we count.