UA 571 then UA 1971 at San Francisco
Atlanta → San Francisco → Chicago O'Hare
Timetable, San Francisco time
09:29UA 571 from Atlanta at the gatealso CA 7243, VA 8403, NZ 9005
22:45UA 1971 to Chicago O'Hare leaves the gatealso AC 4200
13 h 16 apart on the timetable
UA 1971 leaves 13 h 16 after UA 571 arrives on the timetable: more than half a day, so not a connection we count.