Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from San Jose to The Hague as you normally would.
Located just 2.9 mi from the city center, San Jose is the airport most travelers will use when flying to The Hague from San Jose. Booking flights from San Jose (SJC) to The Hague should be relatively easy as there are 0 daily outbound flights to The Hague from 8 different airlines.