The calculated distance (air line) between Pathein and Mawlamyinegyunn is approximately 45 miles respectively 72 kilometers.
By car or train, the actual journey to Mawlamyinegyunn is certainly longer, as only the direct route (as the crow flies) between Pathein and Mawlamyinegyunn has been calculated here.
Air line (approximately)
72 kilometers
39 nautical miles