The calculated distance (air line) between Pervomayskoye and Krasnogvardeyskoye is approximately 26 miles respectively 42 kilometers.
By car or train, the actual journey to Krasnogvardeyskoye is certainly longer, as only the direct route (as the crow flies) between Pervomayskoye and Krasnogvardeyskoye has been calculated here.
Air line (approximately)
42 kilometers
23 nautical miles