AA 2230 then UA 4052 at Houston
Miami → Houston → Louisville
Timetable, Houston time
23:58AA 2230 from Miami at the gate
18:33UA 4052 to Louisville leaves the gate
18 h 35 apart on the timetable, overnight
UA 4052 leaves 18 h 35 after AA 2230 arrives on the timetable: more than half a day, so not a connection we count.