OZ 6344 then UA 5401 at San Francisco
St Louis → San Francisco → Phoenix
Timetable, San Francisco time
21:41OZ 6344 from St Louis at the gate
12:00UA 5401 to Phoenix leaves the gatealso NZ 9375
14 h 19 apart on the timetable, overnight
UA 5401 leaves 14 h 19 after OZ 6344 arrives on the timetable: more than half a day, so not a connection we count.