The calculated distance (air line) between San Bernardino and Álvaro Obregón is approximately 22 miles respectively 35 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 Bernardino and Álvaro Obregón has been calculated here.
Air line (approximately)
35 kilometers
19 nautical miles