AA 4912 then UA 2405 at LAX
St Louis → Los Angeles → Fort Lauderdale
Timetable, Los Angeles time
10:37AA 4912 from St Louis at the gate
09:05UA 2405 to Fort Lauderdale leaves the gate
22 h 28 apart on the timetable, overnight
UA 2405 leaves 22 h 28 after AA 4912 arrives on the timetable: more than half a day, so not a connection we count.