UA 475 then UA 3880 at Houston
Denver → Houston → IAB
Timetable, Houston time
22:54UA 475 from Denver at the gate
22:00UA 3880 to IAB leaves the gate
23 h 06 apart on the timetable, overnight
UA 3880 leaves 23 h 06 after UA 475 arrives on the timetable: more than half a day, so not a connection we count.