From Amsterdam Schiphol (AMS):
Train: Direct trains to Den Haag Centraal (The Hague Central Station) run frequently (every 15-20 mins) and take approximately 30-50 minutes. The estimated cost is around €10 - €12.
Taxi: A taxi ride takes about 30-45 minutes and costs approximately €90 - €120.
From Rotterdam The Hague Airport (RTM):
Public Transport: Take Bus 33 to Meijersplein Metro Station, then connect to Metro E toward Den Haag Centraal. The journey takes about 40 minutes and costs around €4 - €7.
Taxi: A taxi ride to the city centre takes about 30 minutes and costs approximately €55 - €75.