IB 5353 then LA 5756 at Barcelona
Milan → Barcelona → Basel
Timetable, Barcelona time
11:55IB 5353 from Milan at the gate
11:35LA 5756 to Basel leaves the gate
23 h 40 apart on the timetable, overnight
LA 5756 leaves 23 h 40 after IB 5353 arrives on the timetable: more than half a day, so not a connection we count.