The calculated distance (air line) between Montcada i Reixac and Zaragoza is approximately 159 miles respectively 255 kilometers.
By car or train, the actual journey to Zaragoza is certainly longer, as only the direct route (as the crow flies) between Montcada i Reixac and Zaragoza has been calculated here.
Air line (approximately)
255 kilometers
138 nautical miles