The calculated distance (air line) between Kyaikto and Mawlamyinegyunn is approximately 132 miles respectively 213 kilometers.
By car or train, the actual journey to Mawlamyinegyunn is certainly longer, as only the direct route (as the crow flies) between Kyaikto and Mawlamyinegyunn has been calculated here.
Air line (approximately)
213 kilometers
115 nautical miles