AV 4509 then VA 8546 at San Francisco
Taipei → San Francisco → Los Angeles
Timetable, San Francisco time
15:00AV 4509 from Taipei at the gate
06:00VA 8546 to Los Angeles leaves the gate
15 h apart on the timetable, overnight
VA 8546 leaves 15 h after AV 4509 arrives on the timetable: more than half a day, so not a connection we count.