The calculated distance (air line) between Bordj Bou Arreridj and M'Sila is approximately 28 miles respectively 45 kilometers.
By car or train, the actual journey to M'Sila is certainly longer, as only the direct route (as the crow flies) between Bordj Bou Arreridj and M'Sila has been calculated here.
Air line (approximately)
45 kilometers
24 nautical miles