AV 6975 then CM 1447 at San Francisco
Vancouver → San Francisco → Arcata
Timetable, San Francisco time
23:01AV 6975 from Vancouver at the gate
20:50CM 1447 to Arcata leaves the gatealso UA 2220
21 h 49 apart on the timetable, overnight
CM 1447 leaves 21 h 49 after AV 6975 arrives on the timetable: more than half a day, so not a connection we count.