UA 3902 then UA 4594 at Houston
Toronto → Houston → Corpus Christi
Timetable, Houston time
08:27UA 3902 from Toronto at the gate
07:30UA 4594 to Corpus Christi leaves the gate
23 h 03 apart on the timetable, overnight
UA 4594 leaves 23 h 03 after UA 3902 arrives on the timetable: more than half a day, so not a connection we count.