OZ 6344 then AC 4470 at San Francisco
St Louis → San Francisco → Ontario
Timetable, San Francisco time
21:41OZ 6344 from St Louis at the gate
14:00AC 4470 to Ontario leaves the gatealso UA 5592
16 h 19 apart on the timetable, overnight
AC 4470 leaves 16 h 19 after OZ 6344 arrives on the timetable: more than half a day, so not a connection we count.