UA 3914 then UA 1968 at Houston
Chicago → Houston → Kansas City
Timetable, Houston time
23:27UA 3914 from Chicago at the gate
14:45UA 1968 to Kansas City leaves the gate
15 h 18 apart on the timetable, overnight
UA 1968 leaves 15 h 18 after UA 3914 arrives on the timetable: more than half a day, so not a connection we count.