The calculated distance (air line) between Monsummano Terme and San Miniato Basso is approximately 12 miles respectively 19 kilometers.
By car or train, the actual journey to San Miniato Basso is certainly longer, as only the direct route (as the crow flies) between Monsummano Terme and San Miniato Basso has been calculated here.
Air line (approximately)
19 kilometers
11 nautical miles