The calculated distance (air line) between La Negreta and Álvaro Obregón is approximately 114 miles respectively 184 kilometers.
By car or train, the actual journey to Álvaro Obregón is certainly longer, as only the direct route (as the crow flies) between La Negreta and Álvaro Obregón has been calculated here.
Air line (approximately)
184 kilometers
99 nautical miles