EI 7327 then UA 3912 at San Francisco
Chicago O'Hare → San Francisco → Houston
Timetable, San Francisco time
09:40EI 7327 from Chicago O'Hare at the gate
23:00UA 3912 to Houston leaves the gate
13 h 20 apart on the timetable
UA 3912 leaves 13 h 20 after EI 7327 arrives on the timetable: more than half a day, so not a connection we count.