OZ 6344 then UA 1375 at San Francisco
St Louis → San Francisco → Dallas-Fort Worth
Timetable, San Francisco time
21:41OZ 6344 from St Louis at the gate
16:45UA 1375 to Dallas-Fort Worth leaves the gate
19 h 04 apart on the timetable, overnight
UA 1375 leaves 19 h 04 after OZ 6344 arrives on the timetable: more than half a day, so not a connection we count.