NZ 9675 then OZ 9521 at San Francisco
Sacramento → San Francisco → Houston
Timetable, San Francisco time
21:41NZ 9675 from Sacramento at the gate
16:40OZ 9521 to Houston leaves the gate
18 h 59 apart on the timetable, overnight
OZ 9521 leaves 18 h 59 after NZ 9675 arrives on the timetable: more than half a day, so not a connection we count.