UA 876 then SQ 1491 at San Francisco
Tokyo Haneda → San Francisco → New York JFK
Timetable, San Francisco time
11:15UA 876 from Tokyo Haneda at the gatealso NH 7010
06:00SQ 1491 to New York JFK leaves the gate
18 h 45 apart on the timetable, overnight
SQ 1491 leaves 18 h 45 after UA 876 arrives on the timetable: more than half a day, so not a connection we count.