UA 4671 then AA 3176 at LAX
Reno → Los Angeles → San Francisco
Timetable, Los Angeles time
17:29UA 4671 from Reno at the gate
12:37AA 3176 to San Francisco leaves the gate
19 h 08 apart on the timetable, overnight
AA 3176 leaves 19 h 08 after UA 4671 arrives on the timetable: more than half a day, so not a connection we count.