UA 367 then UA 580 at San Francisco
Washington → San Francisco → Los Angeles
Timetable, San Francisco time
01:29UA 367 from Washington at the gatealso LH 7530, VA 8388, NZ 9181
21:20UA 580 to Los Angeles leaves the gatealso CM 1067, VA 8560, NZ 9258
19 h 51 apart on the timetable
UA 580 leaves 19 h 51 after UA 367 arrives on the timetable: more than half a day, so not a connection we count.