The calculated distance (air line) between Kyain Seikgyi Township and Pyapon is approximately 174 miles respectively 280 kilometers.
By car or train, the actual journey to Pyapon is certainly longer, as only the direct route (as the crow flies) between Kyain Seikgyi Township and Pyapon has been calculated here.
Air line (approximately)
280 kilometers
151 nautical miles