UA 1448 then UA 3754 at Houston
Chicago → Houston → Waco
Timetable, Houston time
15:40UA 1448 from Chicago at the gate
11:30UA 3754 to Waco leaves the gate
19 h 50 apart on the timetable, overnight
UA 3754 leaves 19 h 50 after UA 1448 arrives on the timetable: more than half a day, so not a connection we count.