UA 3920 then DL 1995 at Houston
Orlando → Houston → Atlanta
Timetable, Houston time
19:47UA 3920 from Orlando at the gate
16:55DL 1995 to Atlanta leaves the gate
21 h 08 apart on the timetable, overnight
DL 1995 leaves 21 h 08 after UA 3920 arrives on the timetable: more than half a day, so not a connection we count.