The calculated distance (air line) between Álvaro Obregón and San Juan del Río is approximately 88 miles respectively 141 kilometers.
By car or train, the actual journey to San Juan del Río is certainly longer, as only the direct route (as the crow flies) between Álvaro Obregón and San Juan del Río has been calculated here.
Air line (approximately)
141 kilometers
76 nautical miles