UA 643 then CI 5345 at San Francisco
Las Vegas → San Francisco → Taipei
Timetable, San Francisco time
07:44UA 643 from Las Vegas at the gatealso AC 5211, NH 7315, VA 8122, NZ 9237
01:50CI 5345 to Taipei leaves the gate
18 h 06 apart on the timetable, overnight
CI 5345 leaves 18 h 06 after UA 643 arrives on the timetable: more than half a day, so not a connection we count.