FR 8385 then KU 1 at Barcelona
Budapest → Barcelona → Belgrade
Timetable, Barcelona time
18:00FR 8385 from Budapest at the gate
13:30KU 1 to Belgrade leaves the gate
19 h 30 apart on the timetable, overnight
KU 1 leaves 19 h 30 after FR 8385 arrives on the timetable: more than half a day, so not a connection we count.