BA 6431 then OZ 9521 at San Francisco
San Diego → San Francisco → Houston
Timetable, San Francisco time
18:06BA 6431 from San Diego at the gate
16:40OZ 9521 to Houston leaves the gate
22 h 34 apart on the timetable, overnight
OZ 9521 leaves 22 h 34 after BA 6431 arrives on the timetable: more than half a day, so not a connection we count.