Flight Amsterdam Airport Schiphol departs from Amsterdam Amsterdam Airport Schiphol at 09:50 and arrives at Madrid Adolfo Suárez Madrid–Barajas Airport at 12:15.
The flighttime is about 2h 25m. The distance travelled ("as the bird flies"): 1606 Km. So the average speed is roughly 665 Km.
The best day to arrive at Amsterdam is Tuesday and it would be best to avoid Monday, as prices are on average 149.73% higher than on Tuesday. (Average prices, based on 680347 datapoints.)
We have a lot more statistics for flights KL 1503 and between Amsterdam and Madrid.