AA 4912 then B6 1524 at LAX
St Louis → Los Angeles → New York JFK
Timetable, Los Angeles time
10:37AA 4912 from St Louis at the gate
22:40B6 1524 to New York JFK leaves the gate
12 h 03 apart on the timetable
B6 1524 leaves 12 h 03 after AA 4912 arrives on the timetable: more than half a day, so not a connection we count.