DL 676 then B6 2718 at JFK
Los Angeles → New York → Boston
Timetable, New York time
06:45DL 676 from Los Angeles at the gate
06:40B6 2718 to Boston leaves the gate
23 h 55 apart on the timetable, overnight
B6 2718 leaves 23 h 55 after DL 676 arrives on the timetable: more than half a day, so not a connection we count.