The calculated distance (air line) between Letpandan and Nay Pyi Taw is approximately 138 miles respectively 221 kilometers.
By car or train, the actual journey to Nay Pyi Taw is certainly longer, as only the direct route (as the crow flies) between Letpandan and Nay Pyi Taw has been calculated here.
Air line (approximately)
221 kilometers
119 nautical miles