UA 3920 then BA 194 at Houston
Orlando → Houston → London
Timetable, Houston time
19:47UA 3920 from Orlando at the gate
15:50BA 194 to London leaves the gate
20 h 03 apart on the timetable, overnight
BA 194 leaves 20 h 03 after UA 3920 arrives on the timetable: more than half a day, so not a connection we count.