FR 6927 then AZ 1677 at Fiumicino
Barcelona → Rome → Firenze
Timetable, Rome time
15:00FR 6927 from Barcelona at the gate
13:50AZ 1677 to Firenze leaves the gate
22 h 50 apart on the timetable, overnight
AZ 1677 leaves 22 h 50 after FR 6927 arrives on the timetable: more than half a day, so not a connection we count.