BR 620 then UA 3874 at LAX
Taipei → Los Angeles → Greensboro
Timetable, Los Angeles time
01:37BR 620 from Taipei at the gate
14:00UA 3874 to Greensboro leaves the gate
12 h 23 apart on the timetable
UA 3874 leaves 12 h 23 after BR 620 arrives on the timetable: more than half a day, so not a connection we count.