UA 3851 then AC 567 at San Francisco
Rio De Janeiro → San Francisco → Vancouver
Timetable, San Francisco time
17:41UA 3851 from Rio De Janeiro at the gate
14:45AC 567 to Vancouver leaves the gatealso SQ 1021, NZ 4608, AV 6904, UA 8564
21 h 04 apart on the timetable, overnight
AC 567 leaves 21 h 04 after UA 3851 arrives on the timetable: more than half a day, so not a connection we count.