The calculated distance (air line) between Arroyo Naranjo and San Cristobal is approximately 49 miles respectively 78 kilometers.
By car or train, the actual journey to San Cristobal is certainly longer, as only the direct route (as the crow flies) between Arroyo Naranjo and San Cristobal has been calculated here.
Air line (approximately)
78 kilometers
42 nautical miles