LA 6139 then DL 670 at San Francisco
Boston → San Francisco → New York JFK
Timetable, San Francisco time
00:24LA 6139 from Boston at the gate
22:25DL 670 to New York JFK leaves the gatealso AM 4305, LY 4444, VS 4848, LA 6189, KQ 7055
22 h 01 apart on the timetable
DL 670 leaves 22 h 01 after LA 6139 arrives on the timetable: more than half a day, so not a connection we count.