OZ 6344 then Y4 2735 at San Francisco
St Louis → San Francisco → Las Vegas
Timetable, San Francisco time
21:41OZ 6344 from St Louis at the gate
11:06Y4 2735 to Las Vegas leaves the gatealso F9 4158
13 h 25 apart on the timetable, overnight
Y4 2735 leaves 13 h 25 after OZ 6344 arrives on the timetable: more than half a day, so not a connection we count.