AA 4222 then UA 6080 at O'Hare
Green Bay → Chicago → Saginaw
Timetable, Chicago time
16:00AA 4222 from Green Bay at the gate
13:25UA 6080 to Saginaw leaves the gate
21 h 25 apart on the timetable, overnight
UA 6080 leaves 21 h 25 after AA 4222 arrives on the timetable: more than half a day, so not a connection we count.