AV 6975 then UA 3917 at San Francisco
Vancouver → San Francisco → Denver
Timetable, San Francisco time
23:01AV 6975 from Vancouver at the gate
21:45UA 3917 to Denver leaves the gate
22 h 44 apart on the timetable, overnight
UA 3917 leaves 22 h 44 after AV 6975 arrives on the timetable: more than half a day, so not a connection we count.