The calculated distance (air line) between Yangon and Mawlamyinegyunn is approximately 66 miles respectively 106 kilometers.
By car or train, the actual journey to Mawlamyinegyunn is certainly longer, as only the direct route (as the crow flies) between Yangon and Mawlamyinegyunn has been calculated here.
Air line (approximately)
106 kilometers
57 nautical miles