AA 363 then UA 3914 at O'Hare
St Louis → Chicago → Houston
Timetable, Chicago time
06:30AA 363 from St Louis at the gate
20:30UA 3914 to Houston leaves the gate
14 h apart on the timetable
UA 3914 leaves 14 h after AA 363 arrives on the timetable: more than half a day, so not a connection we count.