IB 518 then U2 7591 at Madrid
Santiago de Compostela → Madrid → Valencia
Timetable, Madrid time
10:25IB 518 from Santiago de Compostela at the gate
14:55U2 7591 to Valencia leaves the gate
4 h 30 apart on the timetable
The last days
IB 518 and U2 7591 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.