UA 1948 then OZ 6345 at San Francisco
Cancún → San Francisco → Reno
Timetable, San Francisco time
16:52UA 1948 from Cancún at the gate
16:31OZ 6345 to Reno leaves the gate
23 h 39 apart on the timetable, overnight
OZ 6345 leaves 23 h 39 after UA 1948 arrives on the timetable: more than half a day, so not a connection we count.