The calculated distance (air line) between Casilda and San Nicolás de los Arroyos is approximately 59 miles respectively 95 kilometers.
By car or train, the actual journey to San Nicolás de los Arroyos is certainly longer, as only the direct route (as the crow flies) between Casilda and San Nicolás de los Arroyos has been calculated here.
Air line (approximately)
95 kilometers
51 nautical miles