IB 5270 then FR 6920 at Barcelona
Mahón → Barcelona → Dublin
Timetable, Barcelona time
10:15IB 5270 from Mahón at the gate
06:20FR 6920 to Dublin leaves the gate
20 h 05 apart on the timetable, overnight
FR 6920 leaves 20 h 05 after IB 5270 arrives on the timetable: more than half a day, so not a connection we count.