The calculated distance (air line) between Akhtubinsk and Krasnyy Yar is approximately 158 miles respectively 254 kilometers.
By car or train, the actual journey to Krasnyy Yar is certainly longer, as only the direct route (as the crow flies) between Akhtubinsk and Krasnyy Yar has been calculated here.
Air line (approximately)
254 kilometers
137 nautical miles