BA 6431 then OZ 6303 at San Francisco
San Diego → San Francisco → Chicago O'Hare
Timetable, San Francisco time
18:06BA 6431 from San Diego at the gate
17:10OZ 6303 to Chicago O'Hare leaves the gate
23 h 04 apart on the timetable, overnight
OZ 6303 leaves 23 h 04 after BA 6431 arrives on the timetable: more than half a day, so not a connection we count.