AZ 615 then FR 4906 at Fiumicino
Boston → Rome → Palermo
Timetable, Rome time
07:15AZ 615 from Boston at the gate
05:45FR 4906 to Palermo leaves the gate
22 h 30 apart on the timetable, overnight
FR 4906 leaves 22 h 30 after AZ 615 arrives on the timetable: more than half a day, so not a connection we count.