The calculated distance (air line) between Oran and Hammam Bou Hadjar is approximately 29 miles respectively 47 kilometers.
By car or train, the actual journey to Hammam Bou Hadjar is certainly longer, as only the direct route (as the crow flies) between Oran and Hammam Bou Hadjar has been calculated here.
Air line (approximately)
47 kilometers
25 nautical miles