UA 4579 then AA 1869 at Houston
Baton Rouge → Houston → Miami
Timetable, Houston time
13:30UA 4579 from Baton Rouge at the gate
13:20AA 1869 to Miami leaves the gate
23 h 50 apart on the timetable, overnight
AA 1869 leaves 23 h 50 after UA 4579 arrives on the timetable: more than half a day, so not a connection we count.