IB 423 then QR 3683 at Barcelona
Madrid → Barcelona → Santander
Timetable, Barcelona time
20:25IB 423 from Madrid at the gatealso LA 1684, LL 3023, OB 5010, VY 5063, AV 6072, QR 6918
16:05QR 3683 to Santander leaves the gate
19 h 40 apart on the timetable, overnight
QR 3683 leaves 19 h 40 after IB 423 arrives on the timetable: more than half a day, so not a connection we count.