UA 884 then FR 3946 at Fiumicino
Washington → Rome → Palermo
Timetable, Rome time
08:30UA 884 from Washington at the gate
07:15FR 3946 to Palermo leaves the gate
22 h 45 apart on the timetable, overnight
FR 3946 leaves 22 h 45 after UA 884 arrives on the timetable: more than half a day, so not a connection we count.