OZ 6344 then KE 3644 at San Francisco
St Louis → San Francisco → Atlanta
Timetable, San Francisco time
21:41OZ 6344 from St Louis at the gate
11:51KE 3644 to Atlanta leaves the gate
14 h 10 apart on the timetable, overnight
KE 3644 leaves 14 h 10 after OZ 6344 arrives on the timetable: more than half a day, so not a connection we count.