UA 2156 then UA 3880 at Houston
Las Vegas → Houston → IAB
Timetable, Houston time
22:07UA 2156 from Las Vegas at the gate
22:00UA 3880 to IAB leaves the gate
23 h 53 apart on the timetable, overnight
UA 3880 leaves 23 h 53 after UA 2156 arrives on the timetable: more than half a day, so not a connection we count.