DL 2947 then AA 1729 at LAX
Portland (Oregon) → Los Angeles → Miami
Timetable, Los Angeles time
08:45DL 2947 from Portland (Oregon) at the gate
21:30AA 1729 to Miami leaves the gate
12 h 45 apart on the timetable
AA 1729 leaves 12 h 45 after DL 2947 arrives on the timetable: more than half a day, so not a connection we count.