UA 4701 then UA 3754 at Houston
Brownsville → Houston → Waco
Timetable, Houston time
13:28UA 4701 from Brownsville at the gate
11:30UA 3754 to Waco leaves the gate
22 h 02 apart on the timetable, overnight
UA 3754 leaves 22 h 02 after UA 4701 arrives on the timetable: more than half a day, so not a connection we count.