IB 5455 then JU 585 at Barcelona
Paris Charles de Gaulle → Barcelona → Belgrade
Timetable, Barcelona time
23:35IB 5455 from Paris Charles de Gaulle at the gate
20:35JU 585 to Belgrade leaves the gate
21 h apart on the timetable, overnight
JU 585 leaves 21 h after IB 5455 arrives on the timetable: more than half a day, so not a connection we count.