The calculated distance (air line) between Bou Ismaïl and Mostaganem is approximately 153 miles respectively 246 kilometers.
By car or train, the actual journey to Mostaganem is certainly longer, as only the direct route (as the crow flies) between Bou Ismaïl and Mostaganem has been calculated here.
Air line (approximately)
246 kilometers
133 nautical miles