The calculated distance (air line) between Unión de Reyes and Pinar del Río is approximately 140 miles respectively 226 kilometers.
By car or train, the actual journey to Pinar del Río is certainly longer, as only the direct route (as the crow flies) between Unión de Reyes and Pinar del Río has been calculated here.
Air line (approximately)
226 kilometers
122 nautical miles