W6 4737 then FR 1421 at Barcelona
Skopje → Barcelona → Budapest
Timetable, Barcelona time
15:15W6 4737 from Skopje at the gate
05:55FR 1421 to Budapest leaves the gate
14 h 40 apart on the timetable, overnight
FR 1421 leaves 14 h 40 after W6 4737 arrives on the timetable: more than half a day, so not a connection we count.