UA 3914 then B6 2180 at Houston
Chicago → Houston → Fort Lauderdale
Timetable, Houston time
23:27UA 3914 from Chicago at the gate
17:46B6 2180 to Fort Lauderdale leaves the gate
18 h 19 apart on the timetable, overnight
B6 2180 leaves 18 h 19 after UA 3914 arrives on the timetable: more than half a day, so not a connection we count.