AV 6975 then CZ 1640 at San Francisco
Vancouver → San Francisco → Philadelphia
Timetable, San Francisco time
10:32AV 6975 from Vancouver at the gate
22:58CZ 1640 to Philadelphia leaves the gatealso AA 1826
12 h 26 apart on the timetable
CZ 1640 leaves 12 h 26 after AV 6975 arrives on the timetable: more than half a day, so not a connection we count.