UA 571 then UA 412 at San Francisco
Atlanta → San Francisco → Mexico City
Timetable, San Francisco time
09:29UA 571 from Atlanta at the gatealso CA 7243, VA 8403, NZ 9005
22:48UA 412 to Mexico City leaves the gatealso AC 5025
13 h 19 apart on the timetable
UA 412 leaves 13 h 19 after UA 571 arrives on the timetable: more than half a day, so not a connection we count.