The calculated distance (air line) between Aïn el Bya and Mostaganem is approximately 24 miles respectively 38 kilometers.
By car or train, the actual journey to Mostaganem is certainly longer, as only the direct route (as the crow flies) between Aïn el Bya and Mostaganem has been calculated here.
Air line (approximately)
38 kilometers
20 nautical miles