OZ 6344 then B6 1234 at San Francisco
St Louis → San Francisco → Boston
Timetable, San Francisco time
21:41OZ 6344 from St Louis at the gate
14:50B6 1234 to Boston leaves the gate
17 h 09 apart on the timetable, overnight
B6 1234 leaves 17 h 09 after OZ 6344 arrives on the timetable: more than half a day, so not a connection we count.