The calculated distance (air line) between Salitrillo and Álvaro Obregón is approximately 33 miles respectively 52 kilometers.
By car or train, the actual journey to Álvaro Obregón is certainly longer, as only the direct route (as the crow flies) between Salitrillo and Álvaro Obregón has been calculated here.
Air line (approximately)
52 kilometers
28 nautical miles