UA 3920 then DL 1777 at Houston
Orlando → Houston → New York LaGuardia
Timetable, Houston time
19:47UA 3920 from Orlando at the gate
14:00DL 1777 to New York LaGuardia leaves the gate
18 h 13 apart on the timetable, overnight
DL 1777 leaves 18 h 13 after UA 3920 arrives on the timetable: more than half a day, so not a connection we count.