CK 221 then UA 1546 at LAX
Shanghai → Los Angeles → Las Vegas
Timetable, Los Angeles time
10:00CK 221 from Shanghai at the gate
22:42UA 1546 to Las Vegas leaves the gate
12 h 42 apart on the timetable
UA 1546 leaves 12 h 42 after CK 221 arrives on the timetable: more than half a day, so not a connection we count.