The calculated distance (air line) between Nibong Tebal and Bukit Mertajam is approximately 14 miles respectively 22 kilometers.
By car or train, the actual journey to Bukit Mertajam is certainly longer, as only the direct route (as the crow flies) between Nibong Tebal and Bukit Mertajam has been calculated here.
Air line (approximately)
22 kilometers
12 nautical miles