UA 3920 then DL 1891 at Houston
Orlando → Houston → Detroit
Timetable, Houston time
19:47UA 3920 from Orlando at the gate
15:32DL 1891 to Detroit leaves the gate
19 h 45 apart on the timetable, overnight
DL 1891 leaves 19 h 45 after UA 3920 arrives on the timetable: more than half a day, so not a connection we count.