AA 2885 then UA 3912 at San Francisco
Chicago O'Hare → San Francisco → Houston
Timetable, San Francisco time
09:37AA 2885 from Chicago O'Hare at the gatealso QF 3008
23:00UA 3912 to Houston leaves the gate
13 h 23 apart on the timetable
UA 3912 leaves 13 h 23 after AA 2885 arrives on the timetable: more than half a day, so not a connection we count.