UA 99 then AA 3176 at LAX
Melbourne → Los Angeles → San Francisco
Timetable, Los Angeles time
06:55UA 99 from Melbourne at the gate
22:04AA 3176 to San Francisco leaves the gate
15 h 09 apart on the timetable
AA 3176 leaves 15 h 09 after UA 99 arrives on the timetable: more than half a day, so not a connection we count.