The calculated distance (air line) between San Miguel and Gobernador Gálvez is approximately 152 miles respectively 245 kilometers.
By car or train, the actual journey to Gobernador Gálvez is certainly longer, as only the direct route (as the crow flies) between San Miguel and Gobernador Gálvez has been calculated here.
Air line (approximately)
245 kilometers
132 nautical miles