DL 996 then AA 1729 at LAX
Atlanta → Los Angeles → Miami
Timetable, Los Angeles time
08:59DL 996 from Atlanta at the gate
21:30AA 1729 to Miami leaves the gate
12 h 31 apart on the timetable
AA 1729 leaves 12 h 31 after DL 996 arrives on the timetable: more than half a day, so not a connection we count.