BR 620 then UA 2780 at LAX
Taipei → Los Angeles → Chicago O'Hare
Timetable, Los Angeles time
01:37BR 620 from Taipei at the gate
16:45UA 2780 to Chicago O'Hare leaves the gate
15 h 08 apart on the timetable
UA 2780 leaves 15 h 08 after BR 620 arrives on the timetable: more than half a day, so not a connection we count.