The calculated distance (air line) between Oran and Aïn el Bya is approximately 20 miles respectively 32 kilometers.
By car or train, the actual journey to Aïn el Bya is certainly longer, as only the direct route (as the crow flies) between Oran and Aïn el Bya has been calculated here.
Air line (approximately)
32 kilometers
17 nautical miles