VY 3956 then AZ 1781 at Fiumicino
Bilbao → Rome → Palermo
Timetable, Rome time
13:25VY 3956 from Bilbao at the gate
13:15AZ 1781 to Palermo leaves the gate
23 h 50 apart on the timetable, overnight
AZ 1781 leaves 23 h 50 after VY 3956 arrives on the timetable: more than half a day, so not a connection we count.