The calculated distance (air line) between Driebergen-Rijsenburg and Haarlem is approximately 35 miles respectively 57 kilometers.
By car or train, the actual journey to Haarlem is certainly longer, as only the direct route (as the crow flies) between Driebergen-Rijsenburg and Haarlem has been calculated here.
Air line (approximately)
57 kilometers
31 nautical miles