AC 566 then UA 3900 at San Francisco
Vancouver → San Francisco → Rio De Janeiro
Timetable, San Francisco time
16:06AC 566 from Vancouver at the gatealso SQ 1020, LX 4645, NZ 4823, UA 8577
16:00UA 3900 to Rio De Janeiro leaves the gate
23 h 54 apart on the timetable, overnight
UA 3900 leaves 23 h 54 after AC 566 arrives on the timetable: more than half a day, so not a connection we count.