FR 4892 then AZ 204 at Fiumicino
Catania → Rome → London Heathrow
Timetable, Rome time
16:50FR 4892 from Catania at the gate
13:50AZ 204 to London Heathrow leaves the gate
21 h apart on the timetable, overnight
AZ 204 leaves 21 h after FR 4892 arrives on the timetable: more than half a day, so not a connection we count.