The calculated distance (air line) between Kerch and Primorsko-Akhtarsk is approximately 95 miles respectively 153 kilometers.
By car or train, the actual journey to Primorsko-Akhtarsk is certainly longer, as only the direct route (as the crow flies) between Kerch and Primorsko-Akhtarsk has been calculated here.
Air line (approximately)
153 kilometers
83 nautical miles