UA 3920 then UA 323 at Houston
Orlando → Houston → Oklahoma City
Timetable, Houston time
19:47UA 3920 from Orlando at the gate
16:30UA 323 to Oklahoma City leaves the gate
20 h 43 apart on the timetable, overnight
UA 323 leaves 20 h 43 after UA 3920 arrives on the timetable: more than half a day, so not a connection we count.