IB 5270 then FR 4587 at Barcelona
Mahón → Barcelona → Porto
Timetable, Barcelona time
10:15IB 5270 from Mahón at the gate
15:35FR 4587 to Porto leaves the gate
5 h 20 apart on the timetable
The last days
IB 5270 and FR 4587 weren’t both flown 15 min to 12 h apart in the last 21 days.
Statistics from past flights, not live flight information. Always check times and your connection with your airline, and don’t base travel or booking decisions on these numbers.