OZ 6344 then AA 1401 at San Francisco
St Louis → San Francisco → Dallas-Fort Worth
Timetable, San Francisco time
21:41OZ 6344 from St Louis at the gate
15:45AA 1401 to Dallas-Fort Worth leaves the gatealso QF 4572
18 h 04 apart on the timetable, overnight
AA 1401 leaves 18 h 04 after OZ 6344 arrives on the timetable: more than half a day, so not a connection we count.