AA 3263 then UA 4307 at Houston
Miami → Houston → Northwest Arkansas
Timetable, Houston time
11:53AA 3263 from Miami at the gate
09:35UA 4307 to Northwest Arkansas leaves the gate
21 h 42 apart on the timetable, overnight
UA 4307 leaves 21 h 42 after AA 3263 arrives on the timetable: more than half a day, so not a connection we count.