UA 3920 then UA 496 at Houston
Orlando → Houston → Orlando
Timetable, Houston time
19:47UA 3920 from Orlando at the gate
14:20UA 496 to Orlando leaves the gate
18 h 33 apart on the timetable, overnight
UA 496 leaves 18 h 33 after UA 3920 arrives on the timetable: more than half a day, so not a connection we count.