The calculated distance (air line) between San Nicolás and Álvaro Obregón is approximately 91 miles respectively 146 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 Nicolás and Álvaro Obregón has been calculated here.
Air line (approximately)
146 kilometers
79 nautical miles