The calculated distance (air line) between Bykovo and Zheleznodorozhnyy is approximately 8 miles respectively 13 kilometers.
By car or train, the actual journey to Zheleznodorozhnyy is certainly longer, as only the direct route (as the crow flies) between Bykovo and Zheleznodorozhnyy has been calculated here.
Air line (approximately)
13 kilometers
7 nautical miles