IB 5453 then KU 1 at Barcelona
Paris Charles de Gaulle → Barcelona → Belgrade
Timetable, Barcelona time
15:50IB 5453 from Paris Charles de Gaulle at the gatealso LL 5453, VY 8061
13:30KU 1 to Belgrade leaves the gate
21 h 40 apart on the timetable, overnight
KU 1 leaves 21 h 40 after IB 5453 arrives on the timetable: more than half a day, so not a connection we count.