UA 3920 then UA 371 at Houston
Orlando → Houston → San Francisco
Timetable, Houston time
19:47UA 3920 from Orlando at the gate
17:35UA 371 to San Francisco leaves the gate
21 h 48 apart on the timetable, overnight
UA 371 leaves 21 h 48 after UA 3920 arrives on the timetable: more than half a day, so not a connection we count.