The calculated distance (air line) between Feodosiya and Shchyolkino is approximately 35 miles respectively 56 kilometers.
By car or train, the actual journey to Shchyolkino is certainly longer, as only the direct route (as the crow flies) between Feodosiya and Shchyolkino has been calculated here.
Air line (approximately)
56 kilometers
30 nautical miles