G4 536 then G4 3473 at Boston
Grand Rapids → Boston → Fort Lauderdale
Timetable, Boston time
10:34G4 536 from Grand Rapids at the gate
10:19G4 3473 to Fort Lauderdale leaves the gate
23 h 45 apart on the timetable, overnight
G4 3473 leaves 23 h 45 after G4 536 arrives on the timetable: more than half a day, so not a connection we count.