KL 1501 then U2 7591 at Madrid
Amsterdam → Madrid → Valencia
Timetable, Madrid time
09:55KL 1501 from Amsterdam at the gatealso MU 1845, UX 3766, BT 6050, DL 9360
14:55U2 7591 to Valencia leaves the gate
5 h apart on the timetable
The last days
KL 1501 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.