JL 2 then UA 3912 at San Francisco
Tokyo Haneda → San Francisco → Houston
Timetable, San Francisco time
10:25JL 2 from Tokyo Haneda at the gatealso AS 7320, AA 8401, MH 9102
23:00UA 3912 to Houston leaves the gate
12 h 35 apart on the timetable
UA 3912 leaves 12 h 35 after JL 2 arrives on the timetable: more than half a day, so not a connection we count.