The calculated distance (air line) between Termas de Río Hondo and La Rioja is approximately 179 miles respectively 289 kilometers.
By car or train, the actual journey to La Rioja is certainly longer, as only the direct route (as the crow flies) between Termas de Río Hondo and La Rioja has been calculated here.
Air line (approximately)
289 kilometers
156 nautical miles