AA 3033 then UA 3914 at O'Hare
Atlanta → Chicago → Houston
Timetable, Chicago time
20:50AA 3033 from Atlanta at the gate
20:30UA 3914 to Houston leaves the gate
23 h 40 apart on the timetable, overnight
UA 3914 leaves 23 h 40 after AA 3033 arrives on the timetable: more than half a day, so not a connection we count.