IB 421 then QR 3624 at Barcelona
Madrid → Barcelona → Bordeaux
Timetable, Barcelona time
19:15IB 421 from Madrid at the gatealso LL 3021, VY 5122, AV 6170, QR 6971
16:40QR 3624 to Bordeaux leaves the gatealso LL 5462, VY 8122
21 h 25 apart on the timetable, overnight
QR 3624 leaves 21 h 25 after IB 421 arrives on the timetable: more than half a day, so not a connection we count.