IB 5171 then LA 5754 at Barcelona
Bilbao → Barcelona → Bordeaux
Timetable, Barcelona time
18:50IB 5171 from Bilbao at the gate
16:40LA 5754 to Bordeaux leaves the gate
21 h 50 apart on the timetable, overnight
LA 5754 leaves 21 h 50 after IB 5171 arrives on the timetable: more than half a day, so not a connection we count.