The calculated distance (air line) between Calpulalpan and Álvaro Obregón is approximately 44 miles respectively 71 kilometers.
By car or train, the actual journey to Álvaro Obregón is certainly longer, as only the direct route (as the crow flies) between Calpulalpan and Álvaro Obregón has been calculated here.
Air line (approximately)
71 kilometers
38 nautical miles