AA 597 then UA 2127 at San Francisco
Chicago O'Hare → San Francisco → Los Angeles
Timetable, San Francisco time
16:19AA 597 from Chicago O'Hare at the gatealso QF 4712
06:00UA 2127 to Los Angeles leaves the gatealso AV 2163, UA 3904, NZ 9260
13 h 41 apart on the timetable, overnight
UA 2127 leaves 13 h 41 after AA 597 arrives on the timetable: more than half a day, so not a connection we count.