IB 136 then IB 419 at Madrid
Quito → Madrid → Barcelona
Timetable, Madrid time
10:45IB 136 from Quito at the gate
16:50IB 419 to Barcelona leaves the gatealso IB 419S, LA 1524, LL 3019, VY 5059, AT 5332, AV 6174, QR 8077
6 h 05 apart on the timetable
The last days
IB 136 and IB 419 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.