The calculated distance (air line) between Sungai Petani and Kuala Selangor is approximately 167 miles respectively 269 kilometers.
By car or train, the actual journey to Kuala Selangor is certainly longer, as only the direct route (as the crow flies) between Sungai Petani and Kuala Selangor has been calculated here.
Air line (approximately)
269 kilometers
145 nautical miles