The calculated distance (air line) between Martaban and Mawlamyinegyunn is approximately 156 miles respectively 251 kilometers.
By car or train, the actual journey to Mawlamyinegyunn is certainly longer, as only the direct route (as the crow flies) between Martaban and Mawlamyinegyunn has been calculated here.
Air line (approximately)
251 kilometers
136 nautical miles