The calculated distance (air line) between Pistoia and Sesto Fiorentino is approximately 15 miles respectively 25 kilometers.
By car or train, the actual journey to Sesto Fiorentino is certainly longer, as only the direct route (as the crow flies) between Pistoia and Sesto Fiorentino has been calculated here.
Air line (approximately)
25 kilometers
13 nautical miles