UA 1381 then B6 2180 at Houston
Washington → Houston → Fort Lauderdale
Timetable, Houston time
17:15UA 1381 from Washington at the gate
16:55B6 2180 to Fort Lauderdale leaves the gate
23 h 40 apart on the timetable, overnight
B6 2180 leaves 23 h 40 after UA 1381 arrives on the timetable: more than half a day, so not a connection we count.