UA 3851 then GF 4166 at San Francisco
Rio De Janeiro → San Francisco → Los Angeles
Timetable, San Francisco time
17:41UA 3851 from Rio De Janeiro at the gate
16:10GF 4166 to Los Angeles leaves the gatealso BA 6507
22 h 29 apart on the timetable, overnight
GF 4166 leaves 22 h 29 after UA 3851 arrives on the timetable: more than half a day, so not a connection we count.