The calculated distance (air line) between San Isidro and San Juan de la Rambla is approximately 23 miles respectively 36 kilometers.
By car or train, the actual journey to San Juan de la Rambla is certainly longer, as only the direct route (as the crow flies) between San Isidro and San Juan de la Rambla has been calculated here.
Air line (approximately)
36 kilometers
20 nautical miles