AA 3909 then UA 3914 at O'Hare
Green Bay → Chicago → Houston
Timetable, Chicago time
22:00AA 3909 from Green Bay at the gate
20:30UA 3914 to Houston leaves the gate
22 h 30 apart on the timetable, overnight
UA 3914 leaves 22 h 30 after AA 3909 arrives on the timetable: more than half a day, so not a connection we count.