The calculated distance (air line) between Chellalat el Adhaouara and Mostaganem is approximately 186 miles respectively 300 kilometers.
By car or train, the actual journey to Mostaganem is certainly longer, as only the direct route (as the crow flies) between Chellalat el Adhaouara and Mostaganem has been calculated here.
Air line (approximately)
300 kilometers
162 nautical miles