AA 1815 then AA 2230 at Miami
Grand Cayman → Miami → Houston
Timetable, Miami time
09:56AA 1815 from Grand Cayman at the gate
21:59AA 2230 to Houston leaves the gate
12 h 03 apart on the timetable
AA 2230 leaves 12 h 03 after AA 1815 arrives on the timetable: more than half a day, so not a connection we count.