UA 3920 then AA 1869 at Houston
Orlando → Houston → Miami
Timetable, Houston time
19:47UA 3920 from Orlando at the gate
17:00AA 1869 to Miami leaves the gate
21 h 13 apart on the timetable, overnight
AA 1869 leaves 21 h 13 after UA 3920 arrives on the timetable: more than half a day, so not a connection we count.