OZ 6344 then UA 863 at San Francisco
St Louis → San Francisco → Sydney
Timetable, San Francisco time
10:36OZ 6344 from St Louis at the gate
23:05UA 863 to Sydney leaves the gatealso LX 3158, VA 8005, LH 9327, NZ 9863
12 h 29 apart on the timetable
UA 863 leaves 12 h 29 after OZ 6344 arrives on the timetable: more than half a day, so not a connection we count.