The calculated distance (air line) between Sungai Petani and Simpang Empat is approximately 49 miles respectively 79 kilometers.
By car or train, the actual journey to Simpang Empat is certainly longer, as only the direct route (as the crow flies) between Sungai Petani and Simpang Empat has been calculated here.
Air line (approximately)
79 kilometers
43 nautical miles