AZ 75 then FR 3946 at Fiumicino
Barcelona → Rome → Palermo
Timetable, Rome time
08:05AZ 75 from Barcelona at the gate
05:45FR 3946 to Palermo leaves the gate
21 h 40 apart on the timetable, overnight
FR 3946 leaves 21 h 40 after AZ 75 arrives on the timetable: more than half a day, so not a connection we count.