OZ 6344 then WN 1997 at San Francisco
St Louis → San Francisco → Las Vegas
Timetable, San Francisco time
21:41OZ 6344 from St Louis at the gate
13:30WN 1997 to Las Vegas leaves the gate
15 h 49 apart on the timetable, overnight
WN 1997 leaves 15 h 49 after OZ 6344 arrives on the timetable: more than half a day, so not a connection we count.