The calculated distance (air line) between Pirogovskiy and Vostochnyy is approximately 12 miles respectively 20 kilometers.
By car or train, the actual journey to Vostochnyy is certainly longer, as only the direct route (as the crow flies) between Pirogovskiy and Vostochnyy has been calculated here.
Air line (approximately)
20 kilometers
11 nautical miles