The calculated distance (air line) between Eindhoven and Alphen aan den Rijn is approximately 59 miles respectively 95 kilometers.
By car or train, the actual journey to Alphen aan den Rijn is certainly longer, as only the direct route (as the crow flies) between Eindhoven and Alphen aan den Rijn has been calculated here.
Air line (approximately)
95 kilometers
51 nautical miles