UA 3851 then WN 4875 at San Francisco
Rio De Janeiro → San Francisco → Phoenix
Timetable, San Francisco time
17:41UA 3851 from Rio De Janeiro at the gate
16:15WN 4875 to Phoenix leaves the gate
22 h 34 apart on the timetable, overnight
WN 4875 leaves 22 h 34 after UA 3851 arrives on the timetable: more than half a day, so not a connection we count.