The calculated distance (air line) between Tarija and Libertador General San Martín is approximately 157 miles respectively 253 kilometers.
By car or train, the actual journey to Libertador General San Martín is certainly longer, as only the direct route (as the crow flies) between Tarija and Libertador General San Martín has been calculated here.
Air line (approximately)
253 kilometers
137 nautical miles