LA 5799 then FR 4545 at Barcelona
Mahón → Barcelona → Porto
Timetable, Barcelona time
09:00LA 5799 from Mahón at the gate
06:45FR 4545 to Porto leaves the gate
21 h 45 apart on the timetable, overnight
FR 4545 leaves 21 h 45 after LA 5799 arrives on the timetable: more than half a day, so not a connection we count.