AV 6975 then UA 2854 at San Francisco
Vancouver → San Francisco → Philadelphia
Timetable, San Francisco time
10:32AV 6975 from Vancouver at the gate
23:20UA 2854 to Philadelphia leaves the gatealso VA 8450, NZ 9360
12 h 48 apart on the timetable
UA 2854 leaves 12 h 48 after AV 6975 arrives on the timetable: more than half a day, so not a connection we count.