OZ 6344 then UA 2603 at San Francisco
St Louis → San Francisco → Salt Lake City
Timetable, San Francisco time
21:41OZ 6344 from St Louis at the gate
12:28UA 2603 to Salt Lake City leaves the gate
14 h 47 apart on the timetable, overnight
UA 2603 leaves 14 h 47 after OZ 6344 arrives on the timetable: more than half a day, so not a connection we count.