The calculated distance (air line) between Miahuatlán and Álvaro Obregón is approximately 128 miles respectively 206 kilometers.
By car or train, the actual journey to Álvaro Obregón is certainly longer, as only the direct route (as the crow flies) between Miahuatlán and Álvaro Obregón has been calculated here.
Air line (approximately)
206 kilometers
111 nautical miles