The calculated distance (air line) between Novyy Rogachik and Serafimovich is approximately 86 miles respectively 139 kilometers.
By car or train, the actual journey to Serafimovich is certainly longer, as only the direct route (as the crow flies) between Novyy Rogachik and Serafimovich has been calculated here.
Air line (approximately)
139 kilometers
75 nautical miles