IB 672 then AA 8727 at Madrid
Milan → Madrid → Barcelona
Timetable, Madrid time
12:50IB 672 from Milan at the gatealso VY 5277, LA 5422, QR 6520, AA 8662
19:10AA 8727 to Barcelona leaves the gate
6 h 20 apart on the timetable
The last days
IB 672 and AA 8727 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.