AA 4222 then UA 4772 at O'Hare
Green Bay → Chicago → Columbia Regional
Timetable, Chicago time
16:00AA 4222 from Green Bay at the gate
12:45UA 4772 to Columbia Regional leaves the gate
20 h 45 apart on the timetable, overnight
UA 4772 leaves 20 h 45 after AA 4222 arrives on the timetable: more than half a day, so not a connection we count.