QR 3733 then IB 5170 at Barcelona
Mahón → Barcelona → Bilbao
Timetable, Barcelona time
19:25QR 3733 from Mahón at the gate
15:35IB 5170 to Bilbao leaves the gate
20 h 10 apart on the timetable, overnight
IB 5170 leaves 20 h 10 after QR 3733 arrives on the timetable: more than half a day, so not a connection we count.