AA 8676 then IB 547 at Madrid
Bilbao → Madrid → Porto
Timetable, Madrid time
14:45AA 8676 from Bilbao at the gate
15:40IB 547 to Porto leaves the gate
55 min apart on the timetable
The last days
AA 8676 and IB 547 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.