NH 841 then UA 28 at Changi
Tokyo Haneda → Singapore → San Francisco
Timetable, Singapore time
17:35NH 841 from Tokyo Haneda at the gate
08:40UA 28 to San Francisco leaves the gate
15 h 05 apart on the timetable, overnight
UA 28 leaves 15 h 05 after NH 841 arrives on the timetable: more than half a day, so not a connection we count.