HV 5131 then JU 581 at Barcelona
Amsterdam → Barcelona → Belgrade
Timetable, Barcelona time
13:35HV 5131 from Amsterdam at the gate
09:45JU 581 to Belgrade leaves the gate
20 h 10 apart on the timetable, overnight
JU 581 leaves 20 h 10 after HV 5131 arrives on the timetable: more than half a day, so not a connection we count.