The calculated distance (air line) between Hammam Bou Hadjar and Sidi Bel Abbes is approximately 23 miles respectively 37 kilometers.
By car or train, the actual journey to Sidi Bel Abbes is certainly longer, as only the direct route (as the crow flies) between Hammam Bou Hadjar and Sidi Bel Abbes has been calculated here.
Air line (approximately)
37 kilometers
20 nautical miles