FR 270 then LA 5746 at Barcelona
Milan → Barcelona → Bilbao
Timetable, Barcelona time
17:10FR 270 from Milan at the gate
12:20LA 5746 to Bilbao leaves the gate
19 h 10 apart on the timetable, overnight
LA 5746 leaves 19 h 10 after FR 270 arrives on the timetable: more than half a day, so not a connection we count.