UA 4615 then UA 3754 at Houston
Baton Rouge → Houston → Waco
Timetable, Houston time
15:30UA 4615 from Baton Rouge at the gate
11:30UA 3754 to Waco leaves the gate
20 h apart on the timetable, overnight
UA 3754 leaves 20 h after UA 4615 arrives on the timetable: more than half a day, so not a connection we count.