UA 884 then FR 4856 at Fiumicino
Washington → Rome → Catania
Timetable, Rome time
08:30UA 884 from Washington at the gate
20:50FR 4856 to Catania leaves the gate
12 h 20 apart on the timetable
FR 4856 leaves 12 h 20 after UA 884 arrives on the timetable: more than half a day, so not a connection we count.