The calculated distance (air line) between Permatang Kuching and Sungai Petani is approximately 15 miles respectively 24 kilometers.
By car or train, the actual journey to Sungai Petani is certainly longer, as only the direct route (as the crow flies) between Permatang Kuching and Sungai Petani has been calculated here.
Air line (approximately)
24 kilometers
13 nautical miles