The calculated distance (air line) between Batu Gajah and Sungai Petani is approximately 90 miles respectively 145 kilometers.
By car or train, the actual journey to Sungai Petani is certainly longer, as only the direct route (as the crow flies) between Batu Gajah and Sungai Petani has been calculated here.
Air line (approximately)
145 kilometers
78 nautical miles