The calculated distance (air line) between Novopetrovskoye and Ryazan’ is approximately 158 miles respectively 254 kilometers.
By car or train, the actual journey to Ryazan’ is certainly longer, as only the direct route (as the crow flies) between Novopetrovskoye and Ryazan’ has been calculated here.
Air line (approximately)
254 kilometers
137 nautical miles