UA 6147 then UA 3754 at Houston
New Orleans → Houston → Waco
Timetable, Houston time
13:34UA 6147 from New Orleans at the gate
11:30UA 3754 to Waco leaves the gate
21 h 56 apart on the timetable, overnight
UA 3754 leaves 21 h 56 after UA 6147 arrives on the timetable: more than half a day, so not a connection we count.