The calculated distance (air line) between Kerch and Krasnoarmeyskaya is approximately 84 miles respectively 136 kilometers.
By car or train, the actual journey to Krasnoarmeyskaya is certainly longer, as only the direct route (as the crow flies) between Kerch and Krasnoarmeyskaya has been calculated here.
Air line (approximately)
136 kilometers
73 nautical miles