UA 521 then B6 2180 at Houston
Atlanta → Houston → Fort Lauderdale
Timetable, Houston time
17:21UA 521 from Atlanta at the gate
16:55B6 2180 to Fort Lauderdale leaves the gate
23 h 34 apart on the timetable, overnight
B6 2180 leaves 23 h 34 after UA 521 arrives on the timetable: more than half a day, so not a connection we count.