AV 6975 then LH 7871 at San Francisco
Vancouver → San Francisco → Chicago O'Hare
Timetable, San Francisco time
23:01AV 6975 from Vancouver at the gate
14:00LH 7871 to Chicago O'Hare leaves the gate
14 h 59 apart on the timetable, overnight
LH 7871 leaves 14 h 59 after AV 6975 arrives on the timetable: more than half a day, so not a connection we count.