BA 554 then FR 1170 at Fiumicino
London Heathrow → Rome → Catania
Timetable, Rome time
14:55BA 554 from London Heathrow at the gate
10:55FR 1170 to Catania leaves the gate
20 h apart on the timetable, overnight
FR 1170 leaves 20 h after BA 554 arrives on the timetable: more than half a day, so not a connection we count.