The calculated distance (air line) between Nay Pyi Taw and Nyaunglebin is approximately 130 miles respectively 209 kilometers.
By car or train, the actual journey to Nyaunglebin is certainly longer, as only the direct route (as the crow flies) between Nay Pyi Taw and Nyaunglebin has been calculated here.
Air line (approximately)
209 kilometers
113 nautical miles