UA 3913 then UA 2385 at Houston
Denver → Houston → New Orleans
Timetable, Houston time
21:22UA 3913 from Denver at the gate
12:00UA 2385 to New Orleans leaves the gate
14 h 38 apart on the timetable, overnight
UA 2385 leaves 14 h 38 after UA 3913 arrives on the timetable: more than half a day, so not a connection we count.