AA 2455 then UA 2405 at LAX
Boston → Los Angeles → Fort Lauderdale
Timetable, Los Angeles time
11:28AA 2455 from Boston at the gate
09:05UA 2405 to Fort Lauderdale leaves the gate
21 h 37 apart on the timetable, overnight
UA 2405 leaves 21 h 37 after AA 2455 arrives on the timetable: more than half a day, so not a connection we count.