The calculated distance (air line) between Fiambalá and San Miguel de Tucumán is approximately 158 miles respectively 255 kilometers.
By car or train, the actual journey to San Miguel de Tucumán is certainly longer, as only the direct route (as the crow flies) between Fiambalá and San Miguel de Tucumán has been calculated here.
Air line (approximately)
255 kilometers
138 nautical miles