The calculated distance (air line) between Fucecchio and Montecatini-Terme is approximately 10 miles respectively 17 kilometers.
By car or train, the actual journey to Montecatini-Terme is certainly longer, as only the direct route (as the crow flies) between Fucecchio and Montecatini-Terme has been calculated here.
Air line (approximately)
17 kilometers
9 nautical miles