The calculated distance (air line) between San Lucas el Grande and Álvaro Obregón is approximately 47 miles respectively 76 kilometers.
By car or train, the actual journey to Álvaro Obregón is certainly longer, as only the direct route (as the crow flies) between San Lucas el Grande and Álvaro Obregón has been calculated here.
Air line (approximately)
76 kilometers
41 nautical miles