DL 112 then FR 3946 at Fiumicino
Boston → Rome → Palermo
Timetable, Rome time
08:45DL 112 from Boston at the gate
07:15FR 3946 to Palermo leaves the gate
22 h 30 apart on the timetable, overnight
FR 3946 leaves 22 h 30 after DL 112 arrives on the timetable: more than half a day, so not a connection we count.