FR 8836 then FR 6926 at Fiumicino
Zagreb → Rome → Barcelona
Timetable, Rome time
19:35FR 8836 from Zagreb at the gate
15:35FR 6926 to Barcelona leaves the gate
20 h apart on the timetable, overnight
FR 6926 leaves 20 h after FR 8836 arrives on the timetable: more than half a day, so not a connection we count.