EC 3749 then QR 3534 at Barcelona
Milan → Barcelona → Seville
Timetable, Barcelona time
09:40EC 3749 from Milan at the gate
15:10QR 3534 to Seville leaves the gate
5 h 30 apart on the timetable
The last days
EC 3749 and QR 3534 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.