AA 9950 then UA 5378 at O'Hare
Philadelphia → Chicago → Green Bay
Timetable, Chicago time
13:49AA 9950 from Philadelphia at the gate
11:29UA 5378 to Green Bay leaves the gate
21 h 40 apart on the timetable, overnight
UA 5378 leaves 21 h 40 after AA 9950 arrives on the timetable: more than half a day, so not a connection we count.