AC 4121 then BR 7 at San Francisco
Ontario → San Francisco → Taipei
Timetable, San Francisco time
17:50AC 4121 from Ontario at the gate
12:00BR 7 to Taipei leaves the gatealso AV 4508, TG 6257
18 h 10 apart on the timetable, overnight
BR 7 leaves 18 h 10 after AC 4121 arrives on the timetable: more than half a day, so not a connection we count.