DL 860 then G4 3473 at Boston
San Francisco → Boston → Fort Lauderdale
Timetable, Boston time
23:35DL 860 from San Francisco at the gate
12:34G4 3473 to Fort Lauderdale leaves the gate
12 h 59 apart on the timetable, overnight
G4 3473 leaves 12 h 59 after DL 860 arrives on the timetable: more than half a day, so not a connection we count.