NZ 9426 then B6 816 at San Francisco
Seattle → San Francisco → New York JFK
Timetable, San Francisco time
21:50NZ 9426 from Seattle at the gate
16:25B6 816 to New York JFK leaves the gate
18 h 35 apart on the timetable, overnight
B6 816 leaves 18 h 35 after NZ 9426 arrives on the timetable: more than half a day, so not a connection we count.