AA 1971 then AA 817 at Philadelphia
Cancún → Philadelphia → Miami
Timetable, Philadelphia time
16:01AA 1971 from Cancún at the gate
11:45AA 817 to Miami leaves the gate
19 h 44 apart on the timetable, overnight
AA 817 leaves 19 h 44 after AA 1971 arrives on the timetable: more than half a day, so not a connection we count.