UA 1089 then UA 3754 at Houston
Mexico City → Houston → Waco
Timetable, Houston time
12:22UA 1089 from Mexico City at the gate
11:30UA 3754 to Waco leaves the gate
23 h 08 apart on the timetable, overnight
UA 3754 leaves 23 h 08 after UA 1089 arrives on the timetable: more than half a day, so not a connection we count.