AV 6985 then AC 4154 at San Francisco
Vancouver → San Francisco → Tucson
Timetable, San Francisco time
16:06AV 6985 from Vancouver at the gate
12:10AC 4154 to Tucson leaves the gatealso UA 5736, NH 7008, NZ 9748
20 h 04 apart on the timetable, overnight
AC 4154 leaves 20 h 04 after AV 6985 arrives on the timetable: more than half a day, so not a connection we count.