UA 3920 then AA 1478 at Houston
Orlando → Houston → Charlotte
Timetable, Houston time
19:47UA 3920 from Orlando at the gate
14:59AA 1478 to Charlotte leaves the gate
19 h 12 apart on the timetable, overnight
AA 1478 leaves 19 h 12 after UA 3920 arrives on the timetable: more than half a day, so not a connection we count.