The calculated distance (air line) between Sterlibashevo and Bizhbulyak is approximately 45 miles respectively 72 kilometers.
By car or train, the actual journey to Bizhbulyak is certainly longer, as only the direct route (as the crow flies) between Sterlibashevo and Bizhbulyak has been calculated here.
Air line (approximately)
72 kilometers
39 nautical miles