The calculated distance (air line) between Akhtubinsk and Krasnoslobodsk is approximately 79 miles respectively 127 kilometers.
By car or train, the actual journey to Krasnoslobodsk is certainly longer, as only the direct route (as the crow flies) between Akhtubinsk and Krasnoslobodsk has been calculated here.
Air line (approximately)
127 kilometers
68 nautical miles