The calculated distance (air line) between Pyu and Nay Pyi Taw is approximately 90 miles respectively 144 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 Pyu and Nay Pyi Taw has been calculated here.
Air line (approximately)
144 kilometers
78 nautical miles