DL 2934 then B6 1223 at JFK
Detroit → New York → Los Angeles
Timetable, New York time
17:56DL 2934 from Detroit at the gate
16:48B6 1223 to Los Angeles leaves the gate
22 h 52 apart on the timetable, overnight
B6 1223 leaves 22 h 52 after DL 2934 arrives on the timetable: more than half a day, so not a connection we count.