AZ 79 then FR 8837 at Fiumicino
Barcelona → Rome → Zagreb
Timetable, Rome time
18:35AZ 79 from Barcelona at the gate
12:00FR 8837 to Zagreb leaves the gate
17 h 25 apart on the timetable, overnight
FR 8837 leaves 17 h 25 after AZ 79 arrives on the timetable: more than half a day, so not a connection we count.