The calculated distance (air line) between Petaling Jaya and Bukit Mertajam is approximately 175 miles respectively 281 kilometers.
By car or train, the actual journey to Bukit Mertajam is certainly longer, as only the direct route (as the crow flies) between Petaling Jaya and Bukit Mertajam has been calculated here.
Air line (approximately)
281 kilometers
152 nautical miles