OZ 6344 then UA 1496 at San Francisco
St Louis → San Francisco → Boston
Timetable, San Francisco time
21:41OZ 6344 from St Louis at the gate
14:42UA 1496 to Boston leaves the gatealso VA 8307, NZ 9013
17 h 01 apart on the timetable, overnight
UA 1496 leaves 17 h 01 after OZ 6344 arrives on the timetable: more than half a day, so not a connection we count.