UA 3920 then UA 470 at Houston
Orlando → Houston → Denver
Timetable, Houston time
19:47UA 3920 from Orlando at the gate
16:26UA 470 to Denver leaves the gate
20 h 39 apart on the timetable, overnight
UA 470 leaves 20 h 39 after UA 3920 arrives on the timetable: more than half a day, so not a connection we count.