DL 2919 then DL 670 at San Francisco
Boston → San Francisco → New York JFK
Timetable, San Francisco time
23:58DL 2919 from Boston at the gatealso SK 3585, AF 3726
23:05DL 670 to New York JFK leaves the gatealso AM 4305, VS 4848, LA 6189, KQ 7055
23 h 07 apart on the timetable, overnight
DL 670 leaves 23 h 07 after DL 2919 arrives on the timetable: more than half a day, so not a connection we count.