UA 1948 then AV 2066 at San Francisco
Cancún → San Francisco → Sacramento
Timetable, San Francisco time
16:52UA 1948 from Cancún at the gate
08:30AV 2066 to Sacramento leaves the gate
15 h 38 apart on the timetable, overnight
AV 2066 leaves 15 h 38 after UA 1948 arrives on the timetable: more than half a day, so not a connection we count.