DL 960 then DL 5798 at JFK
Los Angeles → New York → Boston
Timetable, New York time
05:28DL 960 from Los Angeles at the gate
17:30DL 5798 to Boston leaves the gate
12 h 02 apart on the timetable
DL 5798 leaves 12 h 02 after DL 960 arrives on the timetable: more than half a day, so not a connection we count.