IB 415 then IB 5772 at Barcelona
Madrid → Barcelona → Rome
Timetable, Barcelona time
16:15IB 415 from Madrid at the gatealso LA 1522, LL 3015, VY 5057, AV 6016, QR 6889, BA 7134, AA 8630
20:50IB 5772 to Rome leaves the gatealso LL 5772, VY 6020
4 h 35 apart on the timetable
The last days
IB 415 and IB 5772 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.