The calculated distance (air line) between La Romana and Concepción de La Vega is approximately 116 miles respectively 186 kilometers.
By car or train, the actual journey to Concepción de La Vega is certainly longer, as only the direct route (as the crow flies) between La Romana and Concepción de La Vega has been calculated here.
Air line (approximately)
186 kilometers
100 nautical miles