Flight Amsterdam Airport Schiphol departs from Amsterdam Amsterdam Airport Schiphol at 20:50 and arrives at Madrid Adolfo Suárez Madrid–Barajas Airport at 23:25.
The flighttime is about 2h 35m. The distance travelled ("as the bird flies"): 1606 Km. So the average speed is roughly 622 Km.
The best day to arrive at Amsterdam is Sunday and it would be best to avoid Monday, as prices are on average 133% higher than on Sunday. (Average prices, based on 776450 datapoints.)
We have a lot more statistics for flights KL 1509 and between Amsterdam and Madrid.