UA 3851 then CA 7337 at San Francisco
Rio De Janeiro → San Francisco → Seattle
Timetable, San Francisco time
17:41UA 3851 from Rio De Janeiro at the gate
14:10CA 7337 to Seattle leaves the gatealso NZ 9403
20 h 29 apart on the timetable, overnight
CA 7337 leaves 20 h 29 after UA 3851 arrives on the timetable: more than half a day, so not a connection we count.