The calculated distance (air line) between At-Bashi and Bazar-Korgon is approximately 159 miles respectively 256 kilometers.
By car or train, the actual journey to Bazar-Korgon is certainly longer, as only the direct route (as the crow flies) between At-Bashi and Bazar-Korgon has been calculated here.
Air line (approximately)
256 kilometers
138 nautical miles