AA 1243 then UA 2405 at LAX
Boston → Los Angeles → Fort Lauderdale
Timetable, Los Angeles time
12:32AA 1243 from Boston at the gate
09:05UA 2405 to Fort Lauderdale leaves the gate
20 h 33 apart on the timetable, overnight
UA 2405 leaves 20 h 33 after AA 1243 arrives on the timetable: more than half a day, so not a connection we count.