B6 2001 then B6 1223 at JFK
Buffalo → New York → Los Angeles
Timetable, New York time
07:30B6 2001 from Buffalo at the gate
20:29B6 1223 to Los Angeles leaves the gate
12 h 59 apart on the timetable
B6 1223 leaves 12 h 59 after B6 2001 arrives on the timetable: more than half a day, so not a connection we count.