The calculated distance (air line) between Parit Buntar and Bukit Mertajam is approximately 16 miles respectively 26 kilometers.
By car or train, the actual journey to Bukit Mertajam is certainly longer, as only the direct route (as the crow flies) between Parit Buntar and Bukit Mertajam has been calculated here.
Air line (approximately)
26 kilometers
14 nautical miles