UA 3920 then UA 462 at Houston
Orlando → Houston → Boston
Timetable, Houston time
19:47UA 3920 from Orlando at the gate
16:38UA 462 to Boston leaves the gate
20 h 51 apart on the timetable, overnight
UA 462 leaves 20 h 51 after UA 3920 arrives on the timetable: more than half a day, so not a connection we count.