The calculated distance (air line) between San Luis Potosí and San Luis de la Paz is approximately 66 miles respectively 106 kilometers.
By car or train, the actual journey to San Luis de la Paz is certainly longer, as only the direct route (as the crow flies) between San Luis Potosí and San Luis de la Paz has been calculated here.
Air line (approximately)
106 kilometers
57 nautical miles