The calculated distance (air line) between Tanah Rata and Bukit Mertajam is approximately 88 miles respectively 142 kilometers.
By car or train, the actual journey to Bukit Mertajam is certainly longer, as only the direct route (as the crow flies) between Tanah Rata and Bukit Mertajam has been calculated here.
Air line (approximately)
142 kilometers
77 nautical miles