The calculated distance (air line) between San Francisco de Asís and San Luis Potosí is approximately 148 miles respectively 238 kilometers.
By car or train, the actual journey to San Luis Potosí is certainly longer, as only the direct route (as the crow flies) between San Francisco de Asís and San Luis Potosí has been calculated here.
Air line (approximately)
238 kilometers
129 nautical miles