UA 1366 then UA 3754 at Houston
Nashville → Houston → Waco
Timetable, Houston time
15:16UA 1366 from Nashville at the gate
11:30UA 3754 to Waco leaves the gate
20 h 14 apart on the timetable, overnight
UA 3754 leaves 20 h 14 after UA 1366 arrives on the timetable: more than half a day, so not a connection we count.