The calculated distance (air line) between Al Başrah al Qadīmah and Dehdasht is approximately 165 miles respectively 265 kilometers.
By car or train, the actual journey to Dehdasht is certainly longer, as only the direct route (as the crow flies) between Al Başrah al Qadīmah and Dehdasht has been calculated here.
Air line (approximately)
265 kilometers
143 nautical miles