IB 934 then IB 409 at Madrid
Dubrovnik → Madrid → Barcelona
Timetable, Madrid time
15:40IB 934 from Dubrovnik at the gatealso VY 5525
10:25IB 409 to Barcelona leaves the gatealso IB 409S, LA 1624, CX 1827, LL 3009, VY 5116, AV 6078, BA 7129, QR 7246, AA 8727
18 h 45 apart on the timetable, overnight
IB 409 leaves 18 h 45 after IB 934 arrives on the timetable: more than half a day, so not a connection we count.