The calculated distance (air line) between San Martín de la Vega and Zaragoza is approximately 173 miles respectively 278 kilometers.
By car or train, the actual journey to Zaragoza is certainly longer, as only the direct route (as the crow flies) between San Martín de la Vega and Zaragoza has been calculated here.
Air line (approximately)
278 kilometers
150 nautical miles