UA 3920 then UA 20 at Houston
Orlando → Houston → Amsterdam
Timetable, Houston time
19:47UA 3920 from Orlando at the gate
15:55UA 20 to Amsterdam leaves the gate
20 h 08 apart on the timetable, overnight
UA 20 leaves 20 h 08 after UA 3920 arrives on the timetable: more than half a day, so not a connection we count.