NZ 9172 then OZ 9521 at San Francisco
Eugene → San Francisco → Houston
Timetable, San Francisco time
21:05NZ 9172 from Eugene at the gate
16:40OZ 9521 to Houston leaves the gate
19 h 35 apart on the timetable, overnight
OZ 9521 leaves 19 h 35 after NZ 9172 arrives on the timetable: more than half a day, so not a connection we count.