AA 2144 then AA 4612 at Miami
Houston → Miami → Oklahoma City
Timetable, Miami time
08:53AA 2144 from Houston at the gate
20:59AA 4612 to Oklahoma City leaves the gate
12 h 06 apart on the timetable
AA 4612 leaves 12 h 06 after AA 2144 arrives on the timetable: more than half a day, so not a connection we count.