DL 693 then UA 3912 at San Francisco
Atlanta → San Francisco → Houston
Timetable, San Francisco time
10:41DL 693 from Atlanta at the gatealso LA 6160
23:00UA 3912 to Houston leaves the gate
12 h 19 apart on the timetable
UA 3912 leaves 12 h 19 after DL 693 arrives on the timetable: more than half a day, so not a connection we count.