FR 6927 then AZ 344 at Fiumicino
Barcelona → Rome → Nice
Timetable, Rome time
15:00FR 6927 from Barcelona at the gate
13:15AZ 344 to Nice leaves the gate
22 h 15 apart on the timetable, overnight
AZ 344 leaves 22 h 15 after FR 6927 arrives on the timetable: more than half a day, so not a connection we count.