UA 3926 then B6 416 at San Francisco
Newark → San Francisco → New York JFK
Timetable, San Francisco time
22:56UA 3926 from Newark at the gate
14:55B6 416 to New York JFK leaves the gatealso SQ 1548
15 h 59 apart on the timetable, overnight
B6 416 leaves 15 h 59 after UA 3926 arrives on the timetable: more than half a day, so not a connection we count.