AZ 355 then FR 6342 at Fiumicino
Nice → Rome → Barcelona
Timetable, Rome time
20:35AZ 355 from Nice at the gate
17:00FR 6342 to Barcelona leaves the gate
20 h 25 apart on the timetable, overnight
FR 6342 leaves 20 h 25 after AZ 355 arrives on the timetable: more than half a day, so not a connection we count.