UA 3851 then AF 81 at San Francisco
Rio De Janeiro → San Francisco → Paris Charles de Gaulle
Timetable, San Francisco time
17:41UA 3851 from Rio De Janeiro at the gate
15:10AF 81 to Paris Charles de Gaulle leaves the gatealso KL 2432, VS 6804, DL 8759
21 h 29 apart on the timetable, overnight
AF 81 leaves 21 h 29 after UA 3851 arrives on the timetable: more than half a day, so not a connection we count.