The calculated distance (air line) between Merlo and Gobernador Gálvez is approximately 158 miles respectively 254 kilometers.
By car or train, the actual journey to Gobernador Gálvez is certainly longer, as only the direct route (as the crow flies) between Merlo and Gobernador Gálvez has been calculated here.
Air line (approximately)
254 kilometers
137 nautical miles