AV 6975 then CZ 1634 at San Francisco
Vancouver → San Francisco → Chicago O'Hare
Timetable, San Francisco time
10:32AV 6975 from Vancouver at the gate
23:39CZ 1634 to Chicago O'Hare leaves the gate
13 h 07 apart on the timetable
CZ 1634 leaves 13 h 07 after AV 6975 arrives on the timetable: more than half a day, so not a connection we count.