UA 1966 then UA 1956 at Houston
Austin → Houston → Fort Lauderdale
Timetable, Houston time
06:28UA 1966 from Austin at the gate
18:32UA 1956 to Fort Lauderdale leaves the gate
12 h 04 apart on the timetable
UA 1956 leaves 12 h 04 after UA 1966 arrives on the timetable: more than half a day, so not a connection we count.