OZ 6344 then UA 543 at San Francisco
St Louis → San Francisco → Las Vegas
Timetable, San Francisco time
21:41OZ 6344 from St Louis at the gate
14:20UA 543 to Las Vegas leaves the gatealso AC 3886, NZ 9222
16 h 39 apart on the timetable, overnight
UA 543 leaves 16 h 39 after OZ 6344 arrives on the timetable: more than half a day, so not a connection we count.