B6 833 then DL 630 at San Francisco
Boston → San Francisco → New York JFK
Timetable, San Francisco time
20:55B6 833 from Boston at the gatealso EY 8011
14:35DL 630 to New York JFK leaves the gatealso LY 4568, VS 4844, LA 6393, LA 6653
17 h 40 apart on the timetable, overnight
DL 630 leaves 17 h 40 after B6 833 arrives on the timetable: more than half a day, so not a connection we count.