The calculated distance (air line) between Katwijk aan den Rijn and Enschede is approximately 105 miles respectively 169 kilometers.
By car or train, the actual journey to Enschede is certainly longer, as only the direct route (as the crow flies) between Katwijk aan den Rijn and Enschede has been calculated here.
Air line (approximately)
169 kilometers
91 nautical miles