AZ 63 then FR 8837 at Fiumicino
Madrid → Rome → Zagreb
Timetable, Rome time
20:30AZ 63 from Madrid at the gate
12:00FR 8837 to Zagreb leaves the gate
15 h 30 apart on the timetable, overnight
FR 8837 leaves 15 h 30 after AZ 63 arrives on the timetable: more than half a day, so not a connection we count.