U2 4937 then FR 3946 at Fiumicino
Paris Orly → Rome → Palermo
Timetable, Rome time
09:50U2 4937 from Paris Orly at the gate
07:15FR 3946 to Palermo leaves the gate
21 h 25 apart on the timetable, overnight
FR 3946 leaves 21 h 25 after U2 4937 arrives on the timetable: more than half a day, so not a connection we count.