AA 3258 then UA 6086 at Houston
Miami → Houston → Shreveport
Timetable, Houston time
09:00AA 3258 from Miami at the gate
07:00UA 6086 to Shreveport leaves the gate
22 h apart on the timetable, overnight
UA 6086 leaves 22 h after AA 3258 arrives on the timetable: more than half a day, so not a connection we count.