DL 2398 then B6 123 at JFK
Atlanta → New York → Los Angeles
Timetable, New York time
17:36DL 2398 from Atlanta at the gate
05:45B6 123 to Los Angeles leaves the gate
12 h 09 apart on the timetable, overnight
B6 123 leaves 12 h 09 after DL 2398 arrives on the timetable: more than half a day, so not a connection we count.