The calculated distance (air line) between Wijk bij Duurstede and The Hague is approximately 45 miles respectively 72 kilometers.
By car or train, the actual journey to The Hague is certainly longer, as only the direct route (as the crow flies) between Wijk bij Duurstede and The Hague has been calculated here.
Air line (approximately)
72 kilometers
39 nautical miles