IB 646 then SN 3728 at Madrid
Milan Linate → Madrid → Brussels
Timetable, Madrid time
12:55IB 646 from Milan Linate at the gatealso VY 5124
17:30SN 3728 to Brussels leaves the gate
4 h 35 apart on the timetable
The last days
IB 646 and SN 3728 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.