The calculated distance (air line) between Brignano Gera d'Adda and Prato is approximately 135 miles respectively 218 kilometers.
By car or train, the actual journey to Prato is certainly longer, as only the direct route (as the crow flies) between Brignano Gera d'Adda and Prato has been calculated here.
Air line (approximately)
218 kilometers
117 nautical miles