AZ 1754 then FR 999 at Fiumicino
Catania → Rome → Valencia
Timetable, Rome time
17:55AZ 1754 from Catania at the gate
10:35FR 999 to Valencia leaves the gate
16 h 40 apart on the timetable, overnight
FR 999 leaves 16 h 40 after AZ 1754 arrives on the timetable: more than half a day, so not a connection we count.