The calculated distance (air line) between Sungai Besar and Bukit Mertajam is approximately 122 miles respectively 196 kilometers.
By car or train, the actual journey to Bukit Mertajam is certainly longer, as only the direct route (as the crow flies) between Sungai Besar and Bukit Mertajam has been calculated here.
Air line (approximately)
196 kilometers
106 nautical miles