AA 2812 then G4 3473 at Boston
Los Angeles → Boston → Fort Lauderdale
Timetable, Boston time
23:59AA 2812 from Los Angeles at the gate
12:34G4 3473 to Fort Lauderdale leaves the gate
12 h 35 apart on the timetable, overnight
G4 3473 leaves 12 h 35 after AA 2812 arrives on the timetable: more than half a day, so not a connection we count.