UA 3920 then UA 753 at Houston
Orlando → Houston → Grand Cayman
Timetable, Houston time
19:47UA 3920 from Orlando at the gate
12:04UA 753 to Grand Cayman leaves the gate
16 h 17 apart on the timetable, overnight
UA 753 leaves 16 h 17 after UA 3920 arrives on the timetable: more than half a day, so not a connection we count.