U2 1683 then FR 6974 at Fiumicino
Nice → Rome → Barcelona
Timetable, Rome time
11:00U2 1683 from Nice at the gate
08:35FR 6974 to Barcelona leaves the gate
21 h 35 apart on the timetable, overnight
FR 6974 leaves 21 h 35 after U2 1683 arrives on the timetable: more than half a day, so not a connection we count.