UA 3914 then UA 2135 at Houston
Chicago → Houston → Fort Lauderdale
Timetable, Houston time
23:27UA 3914 from Chicago at the gate
14:28UA 2135 to Fort Lauderdale leaves the gate
15 h 01 apart on the timetable, overnight
UA 2135 leaves 15 h 01 after UA 3914 arrives on the timetable: more than half a day, so not a connection we count.