UA 1159 then OZ 6345 at San Francisco
Cancún → San Francisco → Reno
Timetable, San Francisco time
19:17UA 1159 from Cancún at the gate
16:31OZ 6345 to Reno leaves the gate
21 h 14 apart on the timetable, overnight
OZ 6345 leaves 21 h 14 after UA 1159 arrives on the timetable: more than half a day, so not a connection we count.