UA 3851 then AS 3492 at San Francisco
Rio De Janeiro → San Francisco → Santa Ana
Timetable, San Francisco time
17:41UA 3851 from Rio De Janeiro at the gate
14:41AS 3492 to Santa Ana leaves the gatealso QR 8820, AA 9325
21 h apart on the timetable, overnight
AS 3492 leaves 21 h after UA 3851 arrives on the timetable: more than half a day, so not a connection we count.