In general, when looking for the cheapest flight to Amsterdam, try to choose a flight departing in March for the best deal.
In general, most flyers find the cheapest time to book a flight to Amsterdam is about 60 days prior.
In general, booking your departure to Amsterdam for a Thursday represents the best deal on airfare. Try to avoid a Sunday departure to stay away from the highest prices.
Typically, cheap prices to Amsterdam are most often found for morning flights. Cheap prices are less likely for midday flights.