BR 620 then UA 1853 at LAX
Taipei → Los Angeles → San Francisco
Timetable, Los Angeles time
01:37BR 620 from Taipei at the gate
22:35UA 1853 to San Francisco leaves the gate
20 h 58 apart on the timetable
UA 1853 leaves 20 h 58 after BR 620 arrives on the timetable: more than half a day, so not a connection we count.