The calculated distance (air line) between Alor Setar and Simpang Empat is approximately 83 miles respectively 134 kilometers.
By car or train, the actual journey to Simpang Empat is certainly longer, as only the direct route (as the crow flies) between Alor Setar and Simpang Empat has been calculated here.
Air line (approximately)
134 kilometers
72 nautical miles