The calculated distance (air line) between Bou Ismaïl and M'Sila is approximately 122 miles respectively 196 kilometers.
By car or train, the actual journey to M'Sila is certainly longer, as only the direct route (as the crow flies) between Bou Ismaïl and M'Sila has been calculated here.
Air line (approximately)
196 kilometers
106 nautical miles