UA 3905 then UA 686 at San Francisco
Tokyo Haneda → San Francisco → Houston
Timetable, San Francisco time
16:33UA 3905 from Tokyo Haneda at the gate
07:15UA 686 to Houston leaves the gatealso EK 6415, VA 8076, NZ 9201
14 h 42 apart on the timetable, overnight
UA 686 leaves 14 h 42 after UA 3905 arrives on the timetable: more than half a day, so not a connection we count.